| Pension and SERP | Pension and SERP | |||||||||||
| For the Three Months Ended | For the Six Months Ended | |||||||||||
| June 30, 2013 | June 30, 2012 | June 30, 2013 | June 30, 2012 | |||||||||
| (Millions of Dollars) | NU | NU | NU | NU | ||||||||
| Service Cost | $ | 24.6 | $ | 22.8 | $ | 51.1 | $ | 38.1 | ||||
| Interest Cost | 51.9 | 53.2 | 103.5 | 91.3 | ||||||||
| Expected Return on Plan Assets | (68.6) | (59.4) | (139.0) | (101.9) | ||||||||
| Actuarial Loss | 52.6 | 47.4 | 105.5 | 77.4 | ||||||||
| Prior Service Cost | 1.0 | 2.0 | 2.1 | 4.1 | ||||||||
| Total Net Periodic Benefit Expense | $ | 61.5 | $ | 66.0 | $ | 123.2 | $ | 109.0 | ||||
| Capitalized Pension Expense | $ | 19.9 | $ | 19.7 | $ | 36.6 | $ | 30.3 | ||||
| PBOP | PBOP | |||||||||||
| For the Three Months Ended | For the Six Months Ended | |||||||||||
| June 30, 2013 | June 30, 2012 | June 30, 2013 | June 30, 2012 | |||||||||
| (Millions of Dollars) | NU | NU | NU | NU | ||||||||
| Service Cost | $ | 3.7 | $ | 4.5 | $ | 8.5 | $ | 6.8 | ||||
| Interest Cost | 10.9 | 13.9 | 23.6 | 20.1 | ||||||||
| Expected Return on Plan Assets | (13.9) | (11.3) | (27.7) | (17.0) | ||||||||
| Actuarial Loss | 4.7 | 9.7 | 13.0 | 15.2 | ||||||||
| Prior Service Credit | (0.5) | (0.4) | (1.1) | (0.4) | ||||||||
| Net Transition Obligation Cost | - | 3.1 | - | 5.9 | ||||||||
| Total Net Periodic Benefit Expense | $ | 4.9 | $ | 19.5 | $ | 16.3 | $ | 30.6 | ||||
| Capitalized PBOP Expense | $ | 1.5 | $ | 6.5 | $ | 5.0 | $ | 9.8 | ||||
| Pension and SERP | ||||||||||||||||||||||||
| For the Three Months Ended June 30, 2013 | For the Three Months Ended June 30, 2012 | |||||||||||||||||||||||
| NSTAR | NSTAR | |||||||||||||||||||||||
| (Millions of Dollars) | CL&P | Electric(1) | PSNH | WMECO | CL&P | Electric(1) | PSNH | WMECO | ||||||||||||||||
| Service Cost | $ | 6.3 | $ | 7.3 | $ | 3.2 | $ | 1.2 | $ | 5.4 | $ | 7.3 | $ | 2.9 | $ | 1.1 | ||||||||
| Interest Cost | 12.1 | 14.7 | 5.9 | 2.5 | 12.9 | 14.7 | 6.1 | 2.6 | ||||||||||||||||
| Expected Return on Plan Assets | (18.4) | (20.2) | (9.2) | (4.4) | (17.7) | (16.3) | (7.2) | (4.1) | ||||||||||||||||
| Actuarial Loss | 13.9 | 14.6 | 5.4 | 2.9 | 12.6 | 15.9 | 4.1 | 2.7 | ||||||||||||||||
| Prior Service Cost/(Credit) | 0.5 | (0.1) | 0.1 | 0.1 | 0.9 | (0.1) | 0.4 | 0.2 | ||||||||||||||||
| Total Net Periodic Benefit Expense | $ | 14.4 | $ | 16.3 | $ | 5.4 | $ | 2.3 | $ | 14.1 | $ | 21.5 | $ | 6.3 | $ | 2.5 | ||||||||
| Related Intercompany | ||||||||||||||||||||||||
| Allocations | $ | 11.3 | $ | (2.2) | $ | 2.6 | $ | 2.0 | $ | 10.7 | $ | (3.0) | $ | 2.4 | $ | 2.0 | ||||||||
| Capitalized Pension Expense | $ | 7.0 | $ | 6.5 | $ | 1.7 | $ | 1.3 | $ | 6.8 | $ | 8.9 | $ | 1.9 | $ | 1.2 | ||||||||
| Pension and SERP | ||||||||||||||||||||||||
| For the Six Months Ended June 30, 2013 | For the Six Months Ended June 30, 2012 | |||||||||||||||||||||||
| NSTAR | NSTAR | |||||||||||||||||||||||
| (Millions of Dollars) | CL&P | Electric(1) | PSNH | WMECO | CL&P | Electric(1) | PSNH | WMECO | ||||||||||||||||
| Service Cost | $ | 12.4 | $ | 16.5 | $ | 6.5 | $ | 2.4 | $ | 10.9 | $ | 15.1 | $ | 5.8 | $ | 2.1 | ||||||||
| Interest Cost | 24.2 | 29.0 | 11.9 | 5.0 | 25.6 | 29.5 | 12.2 | 5.3 | ||||||||||||||||
| Expected Return on Plan Assets | (36.9) | (42.2) | (16.8) | (8.7) | (35.2) | (32.8) | (13.9) | (8.2) | ||||||||||||||||
| Actuarial Loss | 28.0 | 29.1 | 10.8 | 5.9 | 24.5 | 31.6 | 8.0 | 5.2 | ||||||||||||||||
| Prior Service Cost/(Credit) | 0.9 | (0.1) | 0.3 | 0.2 | 1.8 | (0.3) | 0.8 | 0.4 | ||||||||||||||||
| Total Net Periodic Benefit Expense | $ | 28.6 | $ | 32.3 | $ | 12.7 | $ | 4.8 | $ | 27.6 | $ | 43.1 | $ | 12.9 | $ | 4.8 | ||||||||
| Related Intercompany | ||||||||||||||||||||||||
| Allocations | $ | 22.1 | $ | (4.1) | $ | 5.2 | $ | 4.0 | $ | 21.3 | $ | (6.2) | $ | 5.0 | $ | 4.0 | ||||||||
| Capitalized Pension Expense | $ | 14.0 | $ | 11.8 | $ | 3.9 | $ | 2.6 | $ | 13.4 | $ | 15.2 | $ | 3.9 | $ | 2.4 | ||||||||
| PBOP | ||||||||||||||||||
| For the Three Months Ended June 30, 2013 | For the Three Months Ended June 30, 2012 | |||||||||||||||||
| (Millions of Dollars) | CL&P | PSNH | WMECO | CL&P | PSNH | WMECO | ||||||||||||
| Service Cost | $ | 0.9 | $ | 0.6 | $ | 0.2 | $ | 0.7 | $ | 0.5 | $ | 0.1 | ||||||
| Interest Cost | 2.0 | 1.0 | 0.4 | 2.3 | 1.1 | 0.5 | ||||||||||||
| Expected Return on Plan Assets | (2.5) | (1.3) | (0.6) | (2.3) | (1.1) | (0.5) | ||||||||||||
| Actuarial Loss | 1.9 | 0.9 | 0.3 | 1.8 | 0.8 | 0.3 | ||||||||||||
| Net Transition Obligation Cost | - | - | - | 1.5 | 0.6 | 0.3 | ||||||||||||
| Total Net Periodic Benefit Expense | $ | 2.3 | $ | 1.2 | $ | 0.3 | $ | 4.0 | $ | 1.9 | $ | 0.7 | ||||||
| Related Intercompany | ||||||||||||||||||
| Allocations | $ | 1.9 | $ | 0.4 | $ | 0.3 | $ | 1.9 | $ | 0.5 | $ | 0.4 | ||||||
| Capitalized PBOP Expense | $ | 1.2 | $ | 0.4 | $ | 0.2 | $ | 2.0 | $ | 0.5 | $ | 0.3 | ||||||
| PBOP | ||||||||||||||||||
| For the Six Months Ended June 30, 2013 | For the Six Months Ended June 30, 2012 | |||||||||||||||||
| (Millions of Dollars) | CL&P | PSNH | WMECO | CL&P | PSNH | WMECO | ||||||||||||
| Service Cost | $ | 1.7 | $ | 1.1 | $ | 0.4 | $ | 1.4 | $ | 1.0 | $ | 0.3 | ||||||
| Interest Cost | 3.9 | 2.0 | 0.8 | 4.6 | 2.3 | 1.0 | ||||||||||||
| Expected Return on Plan Assets | (5.0) | (2.6) | (1.2) | (4.5) | (2.3) | (1.1) | ||||||||||||
| Actuarial Loss | 3.7 | 1.8 | 0.6 | 3.8 | 1.8 | 0.6 | ||||||||||||
| Net Transition Obligation Cost | - | - | - | 3.0 | 1.2 | 0.7 | ||||||||||||
| Total Net Periodic Benefit Expense | $ | 4.3 | $ | 2.3 | $ | 0.6 | $ | 8.3 | $ | 4.0 | $ | 1.5 | ||||||
| Related Intercompany | ||||||||||||||||||
| Allocations | $ | 3.6 | $ | 0.8 | $ | 0.6 | $ | 4.1 | $ | 1.0 | $ | 0.8 | ||||||
| Capitalized PBOP Expense | $ | 2.4 | $ | 0.7 | $ | 0.4 | $ | 4.1 | $ | 1.1 | $ | 0.7 | ||||||