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Retirement Benefits (Schedule of Changes in Projected Benefit Obligations) (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Change in plan assets: |  |  |
Fair value of plan assets at beginning of period | $ 1,572 |  |
Fair value of plan assets at end of period | 1,787 | $ 1,572 |
United States |  |  |
Change in projected benefit obligations: |  |  |
Projected benefit obligations at beginning of period | 71 | 77 |
Acquisitions | 0 | 0 |
Service cost | 0 | 0 | $ 0
Interest cost | 3 | 2 | 3
Foreign currency exchange rate changes | 0 | 0 |
Actuarial (gain) loss | 7 | (4) |
Other | 0 | 0 |
Plan amendments | 0 | 0 |
Benefits paid | (5) | (4) |
Projected benefit obligations at end of period | 76 | 71 | 77
Change in plan assets: |  |  |
Fair value of plan assets at beginning of period | 54 | 59 |
Acquisitions | 0 | 0 |
Actual return on plan assets | 10 | (3) |
Employer contributions | 2 | 2 |
Foreign currency exchange rate changes | 0 | 0 |
Benefits paid | (5) | (4) |
Other | (1) | 0 |
Fair value of plan assets at end of period | 60 | 54 | 59
Funded status | (16) | (17) |
Int’l |  |  |
Change in projected benefit obligations: |  |  |
Projected benefit obligations at beginning of period | 1,751 | 2,046 |
Acquisitions | 0 | 24 |
Service cost | 2 | 2 | 1
Interest cost | 50 | 50 | 53
Foreign currency exchange rate changes | 46 | (114) |
Actuarial (gain) loss | 214 | (184) |
Other | (1) | 0 |
Plan amendments | 0 | 20 |
Benefits paid | (74) | (93) |
Projected benefit obligations at end of period | 1,988 | 1,751 | 2,046
Change in plan assets: |  |  |
Fair value of plan assets at beginning of period | 1,518 | 1,673 |
Acquisitions | 0 | 24 |
Actual return on plan assets | 200 | (28) |
Employer contributions | 43 | 39 |
Foreign currency exchange rate changes | 41 | (96) |
Benefits paid | (74) | (93) |
Other | (1) | (1) |
Fair value of plan assets at end of period | 1,727 | 1,518 | $ 1,673
Funded status | $ (261) | $ (233) |

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