| Compensation and Retirement Disclosure [Abstract] | Period [Axis] |
|---|
2015-07-01 - 2016-06-30 |
|---|
Compensation and Retirement Disclosure [Abstract] | |
Benefit obligation and fair value of plan assets for the defined benefit retirement and postretirement plan | The following table provides a reconciliation of the change in projected benefit obligation and fair value of plan assets for the defined benefit retirement and other retirement plans, excluding the multi-employer pension plan liability:
| | | | | | | | | | | | | | | | | At June 30, | Retirement Benefits | | Other Post-Retirement Benefits | (Dollars in millions) | 2016 | | 2015 | | 2016 | | 2015 | Accumulated Benefit Obligation | $ | 328.1 |
| | $ | 316.0 |
| | $ | 3.6 |
| | $ | 3.7 |
| | | | | | | | | Change in Benefit Obligation | | | | | | | | Benefit obligation at beginning of year | 323.7 |
| | 333.8 |
| | 3.7 |
| | 4.4 |
| Company service cost | 2.8 |
| | 2.7 |
| | — |
| | — |
| Interest cost | 10.4 |
| | 11.4 |
| | 0.1 |
| | 0.2 |
| Employee contributions | — |
| | — |
| | — |
| | — |
| Plan amendments | (0.7 | ) | | — |
| | — |
| | — |
| Curtailments | — |
| | (1.6 | ) | | — |
| | — |
| Settlements | — |
| | — |
| | — |
| | — |
| Special termination benefits | — |
| | — |
| | — |
| | — |
| Divestitures | — |
| | — |
| | — |
| | — |
| Business combinations | — |
| | — |
| | — |
| | — |
| Benefits paid | (11.6 | ) | | (9.6 | ) | | (0.2 | ) | | (0.2 | ) | Actual expenses | — |
| | — |
| | — |
| | — |
| Actuarial (gain)/loss | 40.5 |
| | 20.8 |
| | — |
| | (0.7 | ) | Exchange rate gain/(loss) | (28.5 | ) | | (33.8 | ) | | — |
| | — |
| Benefit obligation at end of year | 336.6 |
| | 323.7 |
| | 3.6 |
| | 3.7 |
| | | | | | | | | Change in Plan Assets | | | | | | | | Fair value of plan assets at beginning of year | 222.0 |
| | 222.2 |
| | — |
| | — |
| Actual return on plan assets | 33.8 |
| | 18.4 |
| | — |
| | — |
| Company contributions | 9.2 |
| | 9.0 |
| | 0.2 |
| | 0.2 |
| Employee contributions | — |
| | — |
| | — |
| | — |
| Settlements | — |
| | — |
| | — |
| | — |
| Special company contributions to fund termination benefits | — |
| | — |
| | — |
| | — |
| Divestitures | — |
| | — |
| | — |
| | — |
| Business combinations | — |
| | — |
| | — |
| | — |
| Benefits paid | (11.6 | ) | | (9.6 | ) | | (0.2 | ) | | (0.2 | ) | Actual expenses | — |
| | — |
| | — |
| | — |
| Exchange rate gain/(loss) | (25.8 | ) | | (18.0 | ) | | — |
| | — |
| Fair value of plan assets at end of year | 227.6 |
| | 222.0 |
| | — |
| | — |
| | | | | | | | | Funded Status | | | | | | | | Funded status at end of year | (109.0 | ) | | (101.7 | ) | | (3.6 | ) | | (3.7 | ) | Employer contributions between measurement date and reporting date | — |
| | — |
| | — |
| | — |
| Net pension asset (liability) | (109.0 | ) | | (101.7 | ) | | (3.6 | ) | | (3.7 | ) |
|
Reconciliation of the net amount recognized in the Consolidated Balance Sheets | The following table provides a reconciliation of the net amount recognized in the Consolidated Balance Sheets: | | | | | | | | | | | | | | | | | At June 30, | Retirement Benefits | | Other Post-Retirement Benefits | (Dollars in millions) | 2016 | | 2015 | | 2016 | | 2015 | Amounts Recognized in Statement of Financial Position | | | | | | | | Noncurrent assets | $ | — |
| | $ | 0.6 |
| | $ | — |
| | $ | — |
| Current liabilities | (0.8 | ) | | (0.9 | ) | | — |
| | (0.8 | ) | Noncurrent liabilities | (108.2 | ) | | (101.4 | ) | | (3.6 | ) | | (2.9 | ) | Total asset/(liability) | (109.0 | ) | | (101.7 | ) | | (3.6 | ) | | (3.7 | ) | | | | | | | | | Amounts Recognized in Accumulated Other Comprehensive Income | | | | | | | | Transition (asset)/obligation | — |
| | — |
| | — |
| | — |
| Prior service cost | (0.5 | ) | | 0.1 |
| | — |
| | — |
| Net (gain)/loss | 76.9 |
| | 63.2 |
| | (1.5 | ) | | (1.6 | ) | Total accumulated other comprehensive income at the end of the year | 76.4 |
| | 63.3 |
| | (1.5 | ) | | (1.6 | ) | | | | | | | | | Additional Information for Plan with ABO in Excess of Plan Assets | | | | | | | | Projected benefit obligation | 321.0 |
| | 309.6 |
| | 3.6 |
| | 3.7 |
| Accumulated benefit obligation | 315.7 |
| | 304.1 |
| | 3.6 |
| | 3.7 |
| Fair value of plan assets | 213.3 |
| | 207.3 |
| | — |
| | — |
| | | | | | | | | Additional Information for Plan with PBO in Excess of Plan Assets | | | | | | | | Projected benefit obligation | 336.6 |
| | 309.6 |
| | 3.6 |
| | 3.7 |
| Accumulated benefit obligation | 328.1 |
| | 304.1 |
| | 3.6 |
| | 3.7 |
| Fair value of plan assets | 227.6 |
| | 207.3 |
| | — |
| | — |
| | | | | | | | | Components of Net Periodic Benefit Cost | | | | | | | | Service Cost | 2.8 |
| | 2.7 |
| | — |
| | — |
| Interest Cost | 10.4 |
| | 11.4 |
| | 0.1 |
| | 0.2 |
| Expected return on plan assets | (9.8 | ) | | (10.5 | ) | | — |
| | — |
| Amortization of unrecognized: |
| | | | | | | Transition (asset)/obligation | — |
| | — |
| | — |
| | — |
| Prior service cost | — |
| | — |
| | — |
| | — |
| Net (gain)/loss | 2.9 |
| | 1.8 |
| | (0.1 | ) | | (0.1 | ) | Ongoing periodic cost | 6.3 |
| | 5.4 |
| | — |
| | 0.1 |
| Settlement/curtailment expense/(income) | — |
| | (0.2 | ) | | — |
| | — |
| Net periodic benefit cost | 6.3 |
| | 5.2 |
| | — |
| | 0.1 |
|
| | | | | | | | | | | | | | | | | At June 30, | Retirement Benefits | | Other Post-Retirement Benefits | (Dollars in millions) | 2016 | | 2015 | | 2016 | | 2015 | Other Changes in Plan Assets and Benefit Obligations Recognized in Other Comprehensive Income | | | | | | | | Net (gain)/loss arising during the year | $ | 16.4 |
| | $ | 13.0 |
| | — |
| | (0.7 | ) | Prior service cost (credit) during the year | (0.7 | ) | | — |
| | — |
| | — |
| Transition asset/(obligation) recognized during the year | — |
| | — |
| | — |
| | — |
| Prior service cost recognized during the year | — |
| | — |
| | — |
| | — |
| Net gain/(loss) recognized during the year | (2.8 | ) | | (3.2 | ) | | 0.1 |
| | 0.1 |
| Exchange rate gain/(loss) recognized during the year | 0.2 |
| | (0.6 | ) | | — |
| | — |
| Total recognized in other comprehensive income | $ | 13.1 |
| | $ | 9.2 |
| | $ | 0.1 |
| | $ | (0.6 | ) | Total Recognized in Net Periodic Benefit Cost and Other Comprehensive Income | | | | | | | | Total recognized in net periodic benefit cost and other comprehensive income | $ | 19.3 |
| | $ | 14.4 |
| | $ | 0.1 |
| | $ | (0.5 | ) | Estimated Amounts to be Amortized from Accumulated Other Comprehensive Income into Net Periodic Benefit Cost | | | | | | | | Amortization of: | | | | | | | | Transition (asset)/obligation | $ | — |
| | $ | — |
| | $ | — |
| | $ | — |
| Prior service cost/(credit) | — |
| | — |
| | — |
| | — |
| Net (gain)/loss | 4.5 |
| | 2.9 |
| | (0.1 | ) | | (0.1 | ) | Financial Assumptions Used to Determine Benefit Obligations at the Balance Sheet Date | | | | | | | | Discount rate (%) | 2.33 | % | | 3.38 | % | | 2.89 | % | | 3.69 | % | Rate of compensation increases (%) | 2.10 | % | | 2.06 | % | | n/a |
| | n/a |
| Financial Assumptions Used to Determine Net Periodic Benefit Cost for Financial Year | | | | | | | | Discount rate (%) | 3.38 | % | | 3.73 | % | | 3.69 | % | | 3.67 | % | Rate of compensation increases (%) | 2.10 | % | | 2.10 | % | | n/a |
| | n/a |
| Expected long-term rate of return (%) | 4.93 | % | | 5.11 | % | | n/a |
| | n/a |
| Expected Future Contributions | | | | | | | | Financial Year | | | | | | | | 2017 | $ | 8.4 |
| |
| | $ | 0.3 |
| |
|
|
| | | | | | | | | | | | | At June 30, | Retirement Benefits | | Other Post-Retirement Benefits | (Dollars in millions) | 2016 | | 2015 | | 2016 | | 2015 | Expected Future Benefit Payments | | | | | | | | Financial Year | | | | | | | | 2017 | 9.0 |
| | 10.5 |
| | 0.8 |
| | 0.8 |
| 2018 | 9.4 |
| | 9.5 |
| | 0.3 |
| | 0.3 |
| 2019 | 10.8 |
| | 11.1 |
| | 0.3 |
| | 0.3 |
| 2020 | 11.1 |
| | 11.2 |
| | 0.2 |
| | 0.3 |
| 2021 | 12.0 |
| | 13.9 |
| | 0.2 |
| | 0.3 |
| 2022-2026 | 67.4 |
| | 72.0 |
| | 1.0 |
| | 1.1 |
| | | | | | | | | Actual Asset Allocation (%) | | | | | | | | Equities | 23.6 | % | | 34.2 | % | | — | % | | — | % | Government Bonds | 29.9 | % | | 28.2 | % | | — | % | | — | % | Corporate Bonds | 12.3 | % | | 17.3 | % | | — | % | | — | % | Property | 2.5 | % | | 3.1 | % | | — | % | | — | % | Insurance Contracts | 9.0 | % | | 8.5 | % | | — | % | | — | % | Other | 22.7 | % | | 8.7 | % | | — | % | | — | % | Total | 100.0 | % | | 100.0 | % | | — | % | | — | % | | | | | | | | | Actual Asset Allocation (Amount) | | | | | | | | Equities | 53.7 |
| | 75.7 |
| | — |
| | — |
| Government Bonds | 68.1 |
| | 62.7 |
| | — |
| | — |
| Corporate Bonds | 28.0 |
| | 38.5 |
| | — |
| | — |
| Property | 5.8 |
| | 6.9 |
| | — |
| | — |
| Insurance Contracts | 20.4 |
| | 18.9 |
| | — |
| | — |
| Other | 51.6 |
| | 19.3 |
| | — |
| | — |
| Total | 227.6 |
| | 222.0 |
| | — |
| | — |
| | | | | | | | | Target Asset Allocation (%) | | | | | | | | Equities | 24.1 | % | | 34.5 | % | | — | % | | — | % | Government Bonds | 29.8 | % | | 24.8 | % | | — | % | | — | % | Corporate Bonds | 12.3 | % | | 22.1 | % | | — | % | | — | % | Property | 2.7 | % | | 3.5 | % | | — | % | | — | % | Insurance Contracts | 8.9 | % | | 6.3 | % | | — | % | | — | % | Other | 22.2 | % | | 8.8 | % | | — | % | | — | % | Total | 100.0 | % | | 100.0 | % | | — | % | | — | % |
|
Summary of plan assets that are measured in fair value | The following table provides a summary of plan assets that are measured in fair value as of June 30, 2015, aggregated by the level in the fair value hierarchy within which those measurements fall: | | | | | | | | | | | | | | | | | | | | (Dollars in millions) | Total Assets | | Level 1 | | Level 2 | | Level 3 | | | | | Equity Securities | $ | 75.7 |
| | $ | — |
| | $ | 75.7 |
| | — |
| | | Debt Securities | 101.2 |
| | — |
| | 101.2 |
| | — |
| | | Real Estate | 6.9 |
| | — |
| | 0.3 |
| | 6.6 |
| | | Other | 38.2 |
| | — |
| | 17.3 |
| | 20.9 |
| | | Total | $ | 222.0 |
| | $ | — |
| | $ | 194.5 |
| | $ | 27.5 |
|
The following table provides a summary of plan assets that are measured in fair value as of June 30, 2016, aggregated by the level in the fair value hierarchy within which those measurements fall: | | | | | | | | | | | | | | | | | | | | (Dollars in millions) | Total Assets | | Level 1 | | Level 2 | | Level 3 | | | | | Equity Securities | $ | 53.7 |
| | $ | — |
| | $ | 53.7 |
| | — |
| | | Debt Securities | 96.1 |
| | — |
| | 96.1 |
| | — |
| | | Real Estate | 5.8 |
| | — |
| | 5.8 |
| | — |
| | | Other | 72.0 |
| | — |
| | 52.4 |
| | 19.6 |
| | | Total | $ | 227.6 |
| | $ | — |
| | $ | 208.0 |
| | $ | 19.6 |
|
|
Reconciliation of beginning and ending balances of level 3 assets | Asset Category Allocations - June 30, 2016 | | | | | | | | | | | | | Total (Level 3) | Fair Value Measurement | | Fair Value Measurement | | Fair Value Measurement | (Dollars in millions) | Using Significant | | Using Significant | | Using Significant | | Unobservable Inputs | | Unobservable Inputs | | Unobservable Inputs | | Total (Level 3) | | Insurance Contracts | | Other | Beginning Balance at June 30, 2015 | $ | 27.5 |
| | $ | 4.7 |
| | $ | 22.8 |
| Actual return on plan assets: | | | | | | Relating to assets still held at the reporting date | (0.9 | ) | | (1.3 | ) | | 0.4 |
| Relating to assets sold during the period | — |
| | — |
| | — |
| Purchases, sales, settlements, contributions and benefits paid | (7.0 | ) | | (0.2 | ) | | (6.8 | ) | Transfers in and/or out of Level 3 | — |
| | — |
| | — |
| Ending Balance at June 30, 2016 | $ | 19.6 |
| | $ | 3.2 |
| | $ | 16.4 |
|
|
Assumed healthcare cost trend rates | | | | | | | | | | At June 30, | Other Post-Retirement Benefits | (Actual dollar amounts) | 2016 | | 2015 | | | | | Assumed Healthcare Cost Trend Rates at the Balance Sheet Date | | | | Healthcare cost trend rate – initial (%) | | | | Pre-65 | n/a |
| | n/a |
| Post-65 | 10.35 | % | | 11.35 | % | Healthcare cost trend rate – ultimate (%) | | | | Pre-65 | n/a |
| | n/a |
| Post-65 | 4.84 | % | | 4.64 | % | Year in which ultimate rates are reached | | | | Pre-65 | n/a |
| | n/a |
| Post-65 | 2022 |
| | 2022 |
| Effect of 1% Change in Healthcare Cost Trend Rate | | | | Healthcare cost trend rate up 1% | | | | on APBO at balance sheet date | $ | 169,433 |
| | $ | 171,309 |
| on total service and interest cost | 5,721 |
| | 8,181 |
| Effect of 1% Change in Healthcare Cost Trend Rate | | | | Healthcare cost trend rate down 1% | | | | on APBO at balance sheet date | $ | (151,184 | ) | | $ | (152,189 | ) | on total service and interest cost | (5,106 | ) | | (7,282 | ) | Expected Future Contributions | | | | Financial Year | | | | 2017 | $ | 259,942 |
| | |
|