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Pension and Other Postretirement Benefits (Narrative) (Details) - USD ($) | 12 Months Ended
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Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] |  |  |
Defined benefit plan, additional pension expense | $ 5,000,000 | $ 5,000,000 | $ 5,000,000
Amounts of common stock included in plan assets | 244,000,000 | 140,000,000 |
Defined benefit plan, estimated employer contributions | 21,000,000 |  |
Total contributions | 11,000,000 | 2,000,000 | $ 2,000,000
Employee stock purchase plan, company contribution (less than) |  | $ 1,000,000 |
Pension Plan |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] |  |  |
Estimated net losses of pensions in following twelve months | (94,000,000) |  |
Estimated prior service credits of pensions in following twelve months | $ (1,000,000) |  |
Pension Plan | Non-U.S. Plans |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] |  |  |
Funding level | 100.00% |  |
Target funding level period | 7 years |  |
Expected return net of fees | 1.80% |  |
Percentage change of risk level commensurate | 5.00% |  |
Pension Plan | Non-U.S. Plans | Minimum |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] |  |  |
Yearly rate of funding level decline | 4.00% |  |
Pension Plan | Non-U.S. Plans | Maximum |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] |  |  |
Yearly rate of funding level decline | 7.00% |  |
Other Postretirement Benefits |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] |  |  |
Estimated net losses of pensions in following twelve months | $ (4,000,000) |  |
Estimated prior service credits of pensions in following twelve months | $ (25,000,000) |  |

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- Definition Amount included in accumulated other comprehensive (income) loss for prior service cost (credit) expected to be recognized in net periodic benefit cost (credit) for fiscal year following most recent annual statement of financial position. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (s) -URI http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920 + Details
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