Pension and Other Postretirement Benefits (Schedule of Defined Benefit Plan Assets) (Details) - USD ($) $ in Millions | Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018 |
Level 3 | | | |
Defined Benefit Plan Disclosure [Line Items] | | | |
Defined benefit plan assets at fair value | $ 360 | $ 464 | $ 533 |
Level 3 | Hedge funds | | | |
Defined Benefit Plan Disclosure [Line Items] | | | |
Defined benefit plan assets at fair value | 2 | 43 | 113 |
Level 3 | Private equity | | | |
Defined Benefit Plan Disclosure [Line Items] | | | |
Defined benefit plan assets at fair value | 51 | 75 | 103 |
Level 3 | Defined Benefit Plan, Real Estate | | | |
Defined Benefit Plan Disclosure [Line Items] | | | |
Defined benefit plan assets at fair value | 307 | 346 | 317 |
Fair Value Measured at Net Asset Value Per Share | Fixed income | | | |
Defined Benefit Plan Disclosure [Line Items] | | | |
Defined benefit plan assets at fair value | 137 | 193 | |
Fair Value Measured at Net Asset Value Per Share | Investment funds – global equity | | | |
Defined Benefit Plan Disclosure [Line Items] | | | |
Defined benefit plan assets at fair value | 141 | 96 | |
Fair Value Measured at Net Asset Value Per Share | Hedge funds | | | |
Defined Benefit Plan Disclosure [Line Items] | | | |
Defined benefit plan assets at fair value | 109 | 328 | |
Fair Value Measured at Net Asset Value Per Share | Investment funds – emerging markets | | | |
Defined Benefit Plan Disclosure [Line Items] | | | |
Defined benefit plan assets at fair value | 7 | 23 | |
Pension Plan | | | |
Defined Benefit Plan Disclosure [Line Items] | | | |
Defined benefit plan fair value of plan assets excluding accrued income | 4,659 | 4,604 | |
Pension Plan | Total assets in fair value hierarchy | | | |
Defined Benefit Plan Disclosure [Line Items] | | | |
Defined benefit plan assets at fair value | 4,265 | 3,964 | |
Pension Plan | Level 1 | | | |
Defined Benefit Plan Disclosure [Line Items] | | | |
Defined benefit plan assets at fair value | 1,388 | 1,041 | |
Pension Plan | Level 1 | Cash and cash equivalents | | | |
Defined Benefit Plan Disclosure [Line Items] | | | |
Defined benefit plan assets at fair value | 655 | 213 | |
Pension Plan | Level 1 | Global large cap equity | | | |
Defined Benefit Plan Disclosure [Line Items] | | | |
Defined benefit plan assets at fair value | 9 | 7 | |
Pension Plan | Level 1 | U.S. large cap equity | | | |
Defined Benefit Plan Disclosure [Line Items] | | | |
Defined benefit plan assets at fair value | 182 | 159 | |
Pension Plan | Level 1 | U.S. mid/small cap equity | | | |
Defined Benefit Plan Disclosure [Line Items] | | | |
Defined benefit plan assets at fair value | 323 | 245 | |
Pension Plan | Level 1 | Mutual funds – global equity | | | |
Defined Benefit Plan Disclosure [Line Items] | | | |
Defined benefit plan assets at fair value | 88 | 144 | |
Pension Plan | Level 1 | Mutual funds – U.S. equity | | | |
Defined Benefit Plan Disclosure [Line Items] | | | |
Defined benefit plan assets at fair value | 56 | 206 | |
Pension Plan | Level 1 | Fixed income | | | |
Defined Benefit Plan Disclosure [Line Items] | | | |
Defined benefit plan assets at fair value | 75 | 67 | |
Pension Plan | Level 2 | | | |
Defined Benefit Plan Disclosure [Line Items] | | | |
Defined benefit plan assets at fair value | 2,517 | 2,459 | |
Pension Plan | Level 2 | Fixed income | | | |
Defined Benefit Plan Disclosure [Line Items] | | | |
Defined benefit plan assets at fair value | 128 | 373 | |
Pension Plan | Level 2 | Government issued debt securities | | | |
Defined Benefit Plan Disclosure [Line Items] | | | |
Defined benefit plan assets at fair value | 298 | 260 | |
Pension Plan | Level 2 | Corporate debt securities | | | |
Defined Benefit Plan Disclosure [Line Items] | | | |
Defined benefit plan assets at fair value | 705 | 384 | |
Pension Plan | Level 2 | Asset backed securities | | | |
Defined Benefit Plan Disclosure [Line Items] | | | |
Defined benefit plan assets at fair value | 2 | 2 | |
Pension Plan | Level 2 | Structured debt | | | |
Defined Benefit Plan Disclosure [Line Items] | | | |
Defined benefit plan assets at fair value | 1,034 | 811 | |
Pension Plan | Level 2 | Insurance contracts | | | |
Defined Benefit Plan Disclosure [Line Items] | | | |
Defined benefit plan assets at fair value | 115 | 105 | |
Pension Plan | Level 2 | Derivatives | | | |
Defined Benefit Plan Disclosure [Line Items] | | | |
Defined benefit plan assets at fair value | 166 | 194 | |
Pension Plan | Level 2 | Investment funds – global equity | | | |
Defined Benefit Plan Disclosure [Line Items] | | | |
Defined benefit plan assets at fair value | 69 | 297 | |
Pension Plan | Level 2 | Investment funds – emerging markets | | | |
Defined Benefit Plan Disclosure [Line Items] | | | |
Defined benefit plan assets at fair value | | 33 | |
Pension Plan | Level 3 | | | |
Defined Benefit Plan Disclosure [Line Items] | | | |
Defined benefit plan assets at fair value | 360 | 464 | |
Pension Plan | Level 3 | Hedge funds | | | |
Defined Benefit Plan Disclosure [Line Items] | | | |
Defined benefit plan assets at fair value | 2 | 43 | |
Pension Plan | Level 3 | Private equity | | | |
Defined Benefit Plan Disclosure [Line Items] | | | |
Defined benefit plan assets at fair value | 51 | 75 | |
Pension Plan | Level 3 | Defined Benefit Plan, Real Estate | | | |
Defined Benefit Plan Disclosure [Line Items] | | | |
Defined benefit plan assets at fair value | 35 | 30 | |
Pension Plan | Level 3 | Defined Benefit Plan, Equity Securities, US | | | |
Defined Benefit Plan Disclosure [Line Items] | | | |
Defined benefit plan assets at fair value | 272 | 316 | |
Pension Plan | Fair Value Measured at Net Asset Value Per Share | | | |
Defined Benefit Plan Disclosure [Line Items] | | | |
Defined benefit plan assets at fair value | 394 | 640 | |
Pension Plan | Fair Value Measured at Net Asset Value Per Share | Fixed income | | | |
Defined Benefit Plan Disclosure [Line Items] | | | |
Defined benefit plan assets at fair value | 137 | 193 | |
Pension Plan | Fair Value Measured at Net Asset Value Per Share | Investment funds – global equity | | | |
Defined Benefit Plan Disclosure [Line Items] | | | |
Defined benefit plan assets at fair value | 141 | 96 | |
Pension Plan | Fair Value Measured at Net Asset Value Per Share | Hedge funds | | | |
Defined Benefit Plan Disclosure [Line Items] | | | |
Defined benefit plan assets at fair value | 109 | 328 | |
Pension Plan | Fair Value Measured at Net Asset Value Per Share | Investment funds – emerging markets | | | |
Defined Benefit Plan Disclosure [Line Items] | | | |
Defined benefit plan assets at fair value | 7 | 23 | |
Pension Plan | U.S. Plans | | | |
Defined Benefit Plan Disclosure [Line Items] | | | |
Defined benefit plan assets at fair value | 1,152 | 1,131 | 1,012 |
Defined benefit plan fair value of plan assets excluding accrued income | 1,151 | 1,130 | |
Accrued income | 1 | 1 | |
Pension Plan | U.S. Plans | Total assets in fair value hierarchy | | | |
Defined Benefit Plan Disclosure [Line Items] | | | |
Defined benefit plan assets at fair value | 1,032 | 987 | |
Pension Plan | U.S. Plans | Level 1 | | | |
Defined Benefit Plan Disclosure [Line Items] | | | |
Defined benefit plan assets at fair value | 855 | 813 | |
Pension Plan | U.S. Plans | Level 1 | Cash and cash equivalents | | | |
Defined Benefit Plan Disclosure [Line Items] | | | |
Defined benefit plan assets at fair value | 157 | 23 | |
Pension Plan | U.S. Plans | Level 1 | Global large cap equity | | | |
Defined Benefit Plan Disclosure [Line Items] | | | |
Defined benefit plan assets at fair value | 0 | 0 | |
Pension Plan | U.S. Plans | Level 1 | U.S. large cap equity | | | |
Defined Benefit Plan Disclosure [Line Items] | | | |
Defined benefit plan assets at fair value | 178 | 155 | |
Pension Plan | U.S. Plans | Level 1 | U.S. mid/small cap equity | | | |
Defined Benefit Plan Disclosure [Line Items] | | | |
Defined benefit plan assets at fair value | 301 | 218 | |
Pension Plan | U.S. Plans | Level 1 | Mutual funds – global equity | | | |
Defined Benefit Plan Disclosure [Line Items] | | | |
Defined benefit plan assets at fair value | 88 | 144 | |
Pension Plan | U.S. Plans | Level 1 | Mutual funds – U.S. equity | | | |
Defined Benefit Plan Disclosure [Line Items] | | | |
Defined benefit plan assets at fair value | 56 | 206 | |
Pension Plan | U.S. Plans | Level 1 | Fixed income | | | |
Defined Benefit Plan Disclosure [Line Items] | | | |
Defined benefit plan assets at fair value | 75 | 67 | |
Pension Plan | U.S. Plans | Level 2 | | | |
Defined Benefit Plan Disclosure [Line Items] | | | |
Defined benefit plan assets at fair value | 58 | 52 | |
Pension Plan | U.S. Plans | Level 2 | Fixed income | | | |
Defined Benefit Plan Disclosure [Line Items] | | | |
Defined benefit plan assets at fair value | 0 | 0 | |
Pension Plan | U.S. Plans | Level 2 | Government issued debt securities | | | |
Defined Benefit Plan Disclosure [Line Items] | | | |
Defined benefit plan assets at fair value | 0 | 0 | |
Pension Plan | U.S. Plans | Level 2 | Corporate debt securities | | | |
Defined Benefit Plan Disclosure [Line Items] | | | |
Defined benefit plan assets at fair value | 58 | 52 | |
Pension Plan | U.S. Plans | Level 2 | Asset backed securities | | | |
Defined Benefit Plan Disclosure [Line Items] | | | |
Defined benefit plan assets at fair value | 0 | 0 | |
Pension Plan | U.S. Plans | Level 2 | Structured debt | | | |
Defined Benefit Plan Disclosure [Line Items] | | | |
Defined benefit plan assets at fair value | 0 | 0 | |
Pension Plan | U.S. Plans | Level 2 | Insurance contracts | | | |
Defined Benefit Plan Disclosure [Line Items] | | | |
Defined benefit plan assets at fair value | 0 | 0 | |
Pension Plan | U.S. Plans | Level 2 | Derivatives | | | |
Defined Benefit Plan Disclosure [Line Items] | | | |
Defined benefit plan assets at fair value | 0 | 0 | |
Pension Plan | U.S. Plans | Level 2 | Investment funds – global equity | | | |
Defined Benefit Plan Disclosure [Line Items] | | | |
Defined benefit plan assets at fair value | 0 | 0 | |
Pension Plan | U.S. Plans | Level 2 | Investment funds – emerging markets | | | |
Defined Benefit Plan Disclosure [Line Items] | | | |
Defined benefit plan assets at fair value | | 0 | |
Pension Plan | U.S. Plans | Level 3 | | | |
Defined Benefit Plan Disclosure [Line Items] | | | |
Defined benefit plan assets at fair value | 119 | 122 | |
Pension Plan | U.S. Plans | Level 3 | Hedge funds | | | |
Defined Benefit Plan Disclosure [Line Items] | | | |
Defined benefit plan assets at fair value | 0 | 0 | |
Pension Plan | U.S. Plans | Level 3 | Private equity | | | |
Defined Benefit Plan Disclosure [Line Items] | | | |
Defined benefit plan assets at fair value | 5 | 5 | |
Pension Plan | U.S. Plans | Level 3 | Defined Benefit Plan, Real Estate | | | |
Defined Benefit Plan Disclosure [Line Items] | | | |
Defined benefit plan assets at fair value | 23 | 21 | |
Pension Plan | U.S. Plans | Level 3 | Defined Benefit Plan, Equity Securities, US | | | |
Defined Benefit Plan Disclosure [Line Items] | | | |
Defined benefit plan assets at fair value | 91 | 96 | |
Pension Plan | U.S. Plans | Fair Value Measured at Net Asset Value Per Share | | | |
Defined Benefit Plan Disclosure [Line Items] | | | |
Defined benefit plan assets at fair value | 119 | 143 | |
Pension Plan | U.S. Plans | Fair Value Measured at Net Asset Value Per Share | Fixed income | | | |
Defined Benefit Plan Disclosure [Line Items] | | | |
Defined benefit plan assets at fair value | 112 | 102 | |
Pension Plan | U.S. Plans | Fair Value Measured at Net Asset Value Per Share | Investment funds – global equity | | | |
Defined Benefit Plan Disclosure [Line Items] | | | |
Defined benefit plan assets at fair value | 0 | 18 | |
Pension Plan | U.S. Plans | Fair Value Measured at Net Asset Value Per Share | Hedge funds | | | |
Defined Benefit Plan Disclosure [Line Items] | | | |
Defined benefit plan assets at fair value | 0 | 0 | |
Pension Plan | U.S. Plans | Fair Value Measured at Net Asset Value Per Share | Investment funds – emerging markets | | | |
Defined Benefit Plan Disclosure [Line Items] | | | |
Defined benefit plan assets at fair value | 7 | 23 | |
Pension Plan | Non-U.S. Plans | | | |
Defined Benefit Plan Disclosure [Line Items] | | | |
Defined benefit plan assets at fair value | 3,518 | 3,480 | $ 3,264 |
Defined benefit plan fair value of plan assets excluding accrued income | 3,508 | 3,474 | |
Accrued income | 10 | 6 | |
Pension Plan | Non-U.S. Plans | Total assets in fair value hierarchy | | | |
Defined Benefit Plan Disclosure [Line Items] | | | |
Defined benefit plan assets at fair value | 3,233 | 2,977 | |
Pension Plan | Non-U.S. Plans | Level 1 | | | |
Defined Benefit Plan Disclosure [Line Items] | | | |
Defined benefit plan assets at fair value | 533 | 228 | |
Pension Plan | Non-U.S. Plans | Level 1 | Cash and cash equivalents | | | |
Defined Benefit Plan Disclosure [Line Items] | | | |
Defined benefit plan assets at fair value | 498 | 190 | |
Pension Plan | Non-U.S. Plans | Level 1 | Global large cap equity | | | |
Defined Benefit Plan Disclosure [Line Items] | | | |
Defined benefit plan assets at fair value | 9 | 7 | |
Pension Plan | Non-U.S. Plans | Level 1 | U.S. large cap equity | | | |
Defined Benefit Plan Disclosure [Line Items] | | | |
Defined benefit plan assets at fair value | 4 | 4 | |
Pension Plan | Non-U.S. Plans | Level 1 | U.S. mid/small cap equity | | | |
Defined Benefit Plan Disclosure [Line Items] | | | |
Defined benefit plan assets at fair value | 22 | 27 | |
Pension Plan | Non-U.S. Plans | Level 1 | Mutual funds – global equity | | | |
Defined Benefit Plan Disclosure [Line Items] | | | |
Defined benefit plan assets at fair value | 0 | 0 | |
Pension Plan | Non-U.S. Plans | Level 1 | Mutual funds – U.S. equity | | | |
Defined Benefit Plan Disclosure [Line Items] | | | |
Defined benefit plan assets at fair value | 0 | 0 | |
Pension Plan | Non-U.S. Plans | Level 1 | Fixed income | | | |
Defined Benefit Plan Disclosure [Line Items] | | | |
Defined benefit plan assets at fair value | 0 | 0 | |
Pension Plan | Non-U.S. Plans | Level 2 | | | |
Defined Benefit Plan Disclosure [Line Items] | | | |
Defined benefit plan assets at fair value | 2,459 | 2,407 | |
Pension Plan | Non-U.S. Plans | Level 2 | Fixed income | | | |
Defined Benefit Plan Disclosure [Line Items] | | | |
Defined benefit plan assets at fair value | 128 | 373 | |
Pension Plan | Non-U.S. Plans | Level 2 | Government issued debt securities | | | |
Defined Benefit Plan Disclosure [Line Items] | | | |
Defined benefit plan assets at fair value | 298 | 260 | |
Pension Plan | Non-U.S. Plans | Level 2 | Corporate debt securities | | | |
Defined Benefit Plan Disclosure [Line Items] | | | |
Defined benefit plan assets at fair value | 647 | 332 | |
Pension Plan | Non-U.S. Plans | Level 2 | Asset backed securities | | | |
Defined Benefit Plan Disclosure [Line Items] | | | |
Defined benefit plan assets at fair value | 2 | 2 | |
Pension Plan | Non-U.S. Plans | Level 2 | Structured debt | | | |
Defined Benefit Plan Disclosure [Line Items] | | | |
Defined benefit plan assets at fair value | 1,034 | 811 | |
Pension Plan | Non-U.S. Plans | Level 2 | Insurance contracts | | | |
Defined Benefit Plan Disclosure [Line Items] | | | |
Defined benefit plan assets at fair value | 115 | 105 | |
Pension Plan | Non-U.S. Plans | Level 2 | Derivatives | | | |
Defined Benefit Plan Disclosure [Line Items] | | | |
Defined benefit plan assets at fair value | 166 | 194 | |
Pension Plan | Non-U.S. Plans | Level 2 | Investment funds – global equity | | | |
Defined Benefit Plan Disclosure [Line Items] | | | |
Defined benefit plan assets at fair value | 69 | 297 | |
Pension Plan | Non-U.S. Plans | Level 2 | Investment funds – emerging markets | | | |
Defined Benefit Plan Disclosure [Line Items] | | | |
Defined benefit plan assets at fair value | | 33 | |
Pension Plan | Non-U.S. Plans | Level 3 | | | |
Defined Benefit Plan Disclosure [Line Items] | | | |
Defined benefit plan assets at fair value | 241 | 342 | |
Pension Plan | Non-U.S. Plans | Level 3 | Hedge funds | | | |
Defined Benefit Plan Disclosure [Line Items] | | | |
Defined benefit plan assets at fair value | 2 | 43 | |
Pension Plan | Non-U.S. Plans | Level 3 | Private equity | | | |
Defined Benefit Plan Disclosure [Line Items] | | | |
Defined benefit plan assets at fair value | 46 | 70 | |
Pension Plan | Non-U.S. Plans | Level 3 | Defined Benefit Plan, Real Estate | | | |
Defined Benefit Plan Disclosure [Line Items] | | | |
Defined benefit plan assets at fair value | 12 | 9 | |
Pension Plan | Non-U.S. Plans | Level 3 | Defined Benefit Plan, Equity Securities, US | | | |
Defined Benefit Plan Disclosure [Line Items] | | | |
Defined benefit plan assets at fair value | 181 | 220 | |
Pension Plan | Non-U.S. Plans | Fair Value Measured at Net Asset Value Per Share | | | |
Defined Benefit Plan Disclosure [Line Items] | | | |
Defined benefit plan assets at fair value | 275 | 497 | |
Pension Plan | Non-U.S. Plans | Fair Value Measured at Net Asset Value Per Share | Fixed income | | | |
Defined Benefit Plan Disclosure [Line Items] | | | |
Defined benefit plan assets at fair value | 25 | 91 | |
Pension Plan | Non-U.S. Plans | Fair Value Measured at Net Asset Value Per Share | Investment funds – global equity | | | |
Defined Benefit Plan Disclosure [Line Items] | | | |
Defined benefit plan assets at fair value | 141 | 78 | |
Pension Plan | Non-U.S. Plans | Fair Value Measured at Net Asset Value Per Share | Hedge funds | | | |
Defined Benefit Plan Disclosure [Line Items] | | | |
Defined benefit plan assets at fair value | 109 | 328 | |
Pension Plan | Non-U.S. Plans | Fair Value Measured at Net Asset Value Per Share | Investment funds – emerging markets | | | |
Defined Benefit Plan Disclosure [Line Items] | | | |
Defined benefit plan assets at fair value | $ 0 | $ 0 | |