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v3.19.3.a.u2

Employee Benefit Obligations - Weighted Average Assumptions (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Weighted-average assumptions used to determine net periodic benefit cost |  |  |  |
Pension expense |  | $ 47 |  |
Curtailment and settlement losses including special termination benefits |  | $ 8 |  |
Corridor percentage considered for amortization of accumulated actuarial gains and losses |  | 10.00% |  |
Forecast |  |  |  |
Weighted-average assumptions used to determine net periodic benefit cost |  |  |  |
Pension expense | $ 49 |  |  |
Defined Benefit Pension Plans |  |  |  |
Weighted-average assumptions used to determine benefit obligations |  |  |  |
Effect of one quarter of a percentage point reduction in the expected return on pension assets assumption, on pension expense |  | $ 14 |  |
Effect of quarter of a percentage point reduction in the discount rate applied to the pension liability, on pension expense |  | 1 |  |
Weighted-average assumptions used to determine net periodic benefit cost |  |  |  |
Pension expense |  | 48 | $ 98 | $ 135
Curtailment and settlement losses including special termination benefits |  | 8 | 36 | 46
Market related value of plan assets used to calculate expected return |  | $ 5,375 | $ 6,052 | $ 6,121
US Plan | Defined Benefit Pension Plans |  |  |  |
Weighted-average assumptions used to determine benefit obligations |  |  |  |
Discount rate (as a percent) |  | 3.35% | 4.41% | 3.72%
Rate of compensation increase (as a percent) |  | 4.03% | 4.02% | 4.15%
Weighted-average assumptions used to determine net periodic benefit cost |  |  |  |
Discount rate (as a percent) |  | 4.41% | 3.72% | 4.27%
Rate of compensation increase (as a percent) |  | 4.02% | 4.15% | 4.14%
Expected long-term rate of return on assets (as a percent) |  | 5.58% | 5.14% | 5.50%
Pension expense |  | $ 59 | $ 115 | $ 132
Curtailment and settlement losses including special termination benefits |  |  | 36 | 47
Foreign | Defined Benefit Pension Plans |  |  |  |
Weighted-average assumptions used to determine net periodic benefit cost |  |  |  |
Pension expense |  | (11) | $ (17) | 3
Curtailment and settlement losses including special termination benefits |  | $ 8 |  | $ (1)
U.K. | Defined Benefit Pension Plans |  |  |  |
Weighted-average assumptions used to determine benefit obligations |  |  |  |
Discount rate (as a percent) |  | 2.07% | 2.90% | 2.55%
Rate of compensation increase (as a percent) |  | 3.50% | 3.50% | 4.41%
Pension increase (as a percent) |  | 3.22% | 3.45% | 3.41%
Weighted-average assumptions used to determine net periodic benefit cost |  |  |  |
Discount rate (as a percent) |  | 2.90% | 2.55% | 2.70%
Rate of compensation increase (as a percent) |  | 3.50% | 4.41% | 4.30%
Pension increase (as a percent) |  | 3.45% | 3.41% | 3.41%
Expected long-term rate of return on assets (as a percent) |  | 3.40% | 3.05% | 3.20%
Germany | Defined Benefit Pension Plans |  |  |  |
Weighted-average assumptions used to determine benefit obligations |  |  |  |
Discount rate (as a percent) |  | 1.11% | 1.74% | 1.68%
Rate of compensation increase (as a percent) |  | 2.50% | 2.50% | 2.50%
Pension increase (as a percent) |  | 1.50% | 1.50% | 1.50%
Weighted-average assumptions used to determine net periodic benefit cost |  |  |  |
Discount rate (as a percent) |  | 1.74% | 1.68% | 1.52%
Rate of compensation increase (as a percent) |  | 2.50% | 2.50% | 2.50%
Pension increase (as a percent) |  | 1.50% | 1.50% | 1.50%

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