Slicers (applies to each fact value in each table cell)

Reporting Entity [Axis]

0000007084 (http://www.sec.gov/CIK)

Compensation and Retirement Disclosure [Abstract]	Period [Axis]
	2016-01-01 - 2016-12-31
Compensation and Retirement Disclosure [Abstract]
Retirement Plan Expense	Pension Benefits   Postretirement Benefits (In millions)  Year Ended December 31   Year Ended December 31   2016 2015 2014   2016 2015 2014 Retirement plan expense               Defined benefit plans:               Service cost (benefits earned during the period) $ 82 $ 92 $ 71   $ 3 $ 5 $ 4 Interest cost 113 112 126   8 8 8 Expected return on plan assets (137 ) (129 ) (155 )   — — — Settlement charges (5 ) 60 95   — — — Curtailments — — —   (38 ) — — Amortization of actuarial loss 56 69 36   3 7 2 Amortization of prior service cost (credit) 2 2 3   (17 ) (17 ) (18 ) Net periodic defined benefit plan expense 111 206 176   (41 ) 3 (4 ) Defined contribution plans 57 52 50   — — — Total retirement plan expense $ 168 $ 258 $ 226   $ (41 ) $ 3 $ (4 )
Changes In Defined Benefit Obligation And Fair Value Of Defined Benefit Plan Assets	The following tables set forth changes in the defined benefit obligation and the fair value of defined benefit plan assets for the years ended December 31, 2016 and 2015:   Pension Benefits   Postretirement Benefits   December 31 2016   December 31 2015   December 31 2016   December 31 2015   (In millions)   (In millions) Benefit obligation, beginning $ 2,880   $ 3,305   $ 199   $ 231 Service cost 82   92   3   5 Interest cost 113   112   8   8 Actuarial loss (gain) 132   (117 )   5   (32 ) Employee contributions 1   2   —   — Curtailments —   (2 )   (38 )   — Settlements (10 )   (323 )   —   — Divestitures (8 )   (1 )   —   (1 ) Benefits paid (142 )   (91 )   (9 )   (11 ) Plan amendments —   (1 )   3   — Actual expenses (2 )   (2 )   —   — Foreign currency effects (54 )   (94 )   —   (1 ) Benefit obligation, ending $ 2,992   $ 2,880   $ 171   $ 199                 Fair value of plan assets, beginning $ 1,922   $ 2,194   $ —   $ — Actual return on plan assets 232   (7 )   —   — Employer contributions 183   222   9   11 Employee contributions 1   2   —   — Settlements (10 )   (328 )   —   — Divestitures (2 )   (1 )   —   — Benefits paid (142 )   (91 )   (9 )   (11 ) Actual expenses (2 )   (2 )   —   — Foreign currency effects (51 )   (67 )   —   — Fair value of plan assets, ending $ 2,131   $ 1,922   $ —   $ —                 Funded status $ (861 )   $ (958 )   $ (171 )   $ (199 )                 Prepaid benefit cost $ 30   $ 32   $ —   $ — Accrued benefit liability – current (16 )   (16 )   (13 )   (13 ) Accrued benefit liability – long-term (875 )   (974 )   (158 )   (186 ) Net amount recognized in the balance sheet $ (861 )   $ (958 )   $ (171 )   $ (199 )
Principal Assumptions In Developing Net Periodic Pension Cost	The following table sets forth the principal assumptions used in developing net periodic pension cost:     Pension Benefits   Postretirement Benefits   December 31 2016   December 31 2015   December 31 2016   December 31 2015 Discount rate 4.0%   3.5%   4.0%   3.8% Expected return on plan assets 7.1%   6.3%   N/A   N/A Rate of compensation increase 4.7%   3.8%   N/A   N/A The following table sets forth the principal assumptions used in developing the year-end actuarial present value of the projected benefit obligations:   Pension Benefits   Postretirement Benefits   December 31 2016   December 31 2015   December 31 2016   December 31 2015 Discount rate 3.7 %   4.0 %   3.9%   4.0% Rate of compensation increase 4.6 %   4.7 %   N/A   N/A
Impact Of 1% Change In Assumed Health Care Cost Trend Rates	A 1% change in assumed health care cost trend rates would have the following effects:     1% Increase   1% Decrease   (In millions) Effect on accumulated postretirement benefit obligations $ 5   $ (4 )
Schedule Of Fair Value Of Plan Assets	The following tables set forth, by level within the fair value hierarchy, the fair value of plan assets as of December 31, 2016 and 2015.   Fair Value Measurements at December 31, 2016   Quoted Prices in Active Markets for Identical Assets (Level 1)   Significant Other Observable Inputs (Level 2)   Significant Unobservable Inputs (Level 3)   Total   (In millions) Common stock               U.S. companies $ 222   $ —   $ —   $ 222 International companies 2   —   —   2 Equity mutual funds               Emerging markets 82   —   —   82 International 117   —   —   117 Large cap U.S. 447   —   —   447 Common collective trust funds               International equity —   306   —   306 Large cap U.S. equity —   47   —   47 Fixed income —   190   —   190 Other —   50   —   50 Debt instruments               Corporate bonds —   492   —   492 U.S. Treasury instruments 150   —   —   150 U.S. government agency, state and local government bonds —   22   —   22 Other —   4   —   4 Total assets at fair value $ 1,020   $ 1,111   $ —   $ 2,131   Fair Value Measurements at December 31, 2015   Quoted Prices in Active Markets for Identical Assets (Level 1)   Significant Other Observable Inputs (Level 2)   Significant Unobservable Inputs (Level 3)   Total   (In millions) Common stock               U.S. companies $ 196   $ —   $ —   $ 196 International companies 8   —   —   8 Equity mutual funds               Emerging markets 58   —   —   58 International 105   —   —   105 Large cap U.S. 409   —   —   409 Common collective trust funds               International equity —   278   —   278 Large cap U.S. equity —   45   —   45 Fixed income —   193   —   193 Other —   47   —   47 Debt instruments               Corporate bonds —   457   —   457 U.S. Treasury instruments 99   —   —   99 U.S. government agency, state and local government bonds —   24   —   24 Other —   3   —   3 Total assets at fair value $ 875   $ 1,047   $ —   $ 1,922
Actual Asset Allocation For Global Pension Plan Assets	The following table sets forth the actual asset allocation for the Company’s global pension plan assets as of the measurement date:     December 31 2016(1)(2)   December 31 2015(2) Equity securities 59%   58% Debt securities 40%   40% Other 1%   2% Total 100%   100% (1)  The Company’s U.S. pension plans contain approximately 79% of the Company’s global pension plan assets.  The actual asset allocation for the Company’s U.S. pension plans as of the measurement date consists of 60% equity securities and 40% debt securities.  The target asset allocation for the Company’s U.S. pension plans is approximately the same as the actual asset allocation.  The actual asset allocation for the Company’s foreign pension plans as of the measurement date consists of 54% equity securities, 41% debt securities, and 5% in other investments.  The target asset allocation for the Company’s foreign pension plans is approximately the same as the actual asset allocation. (2)  The Company’s pension plans did not directly hold any shares of Company common stock as of the December 31, 2016 and 2015 measurement dates.
Expected Future Benefit Payments To Be Paid	The following benefit payments, which reflect expected future service, are expected to be paid by the benefit plans:     Pension Benefits   Postretirement Benefits   (In millions) 2017 $ 94   $ 13 2018 100   12 2019 107   12 2020 113   12 2021 121   12 2022 – 2026 709   57