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v3.19.3.a.u2

Employee Benefits - Assumptions (Details) - USD ($) $ in Millions |  | 12 Months Ended
--- | --- | ---
Jan. 01, 2020 | Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Net periodic cost |  |  |  |
Weighted-average healthcare cost rate (as a percent) |  | 6.50% | 6.50% | 7.00%
Effects created by one percentage point change in assumed healthcare cost trend |  |  |  |
Effect of 1% point increase on postretirement obligation |  | $ 0 |  |
Effect of 1% point decrease on postretirement obligation |  | $ 0 |  |
Retirement Plans |  |  |  |
Benefit obligation |  |  |  |
Discount rate (as a percent) |  | 3.45% | 4.40% | 3.68%
Net periodic cost |  |  |  |
Discount rate (as a percent) |  | 2.72% | 2.41% |
Return on assets (as a percent) |  | 6.00% | 6.00% | 6.25%
Retirement Plans | United States Retirement Plans |  |  |  |
Net periodic cost |  |  |  |
Discount rate (as a percent) |  | 4.40% | 3.68% | 4.13%
Retirement Plans | United States Retirement Plans | Subsequent Event |  |  |  |
Net periodic cost |  |  |  |
Return on assets (as a percent) | 5.50% |  |  |
Retirement Plans | United Kingdom Retirement Plan |  |  |  |
Net periodic cost |  |  |  |
Discount rate (as a percent) |  |  |  | 2.58%
Postretirement Plans |  |  |  |
Benefit obligation |  |  |  |
Discount rate (as a percent) |  | 3.08% | 4.15% | 3.40%
Net periodic cost |  |  |  |
Weighted-average healthcare cost rate (as a percent) |  | 5.00% |  |
Discount rate (as a percent) |  | 4.15% | 3.40% | 3.69%

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- Definition Weighted average rate for present value of future retirement benefits cash flows, used to determine net periodic benefit cost of defined benefit plan. + 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 (k)(1) -URI http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920 + Details
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- Definition Weighted average rate of return on plan assets, reflecting average rate of earnings expected on existing plan assets and expected contributions, used to determine net periodic benefit cost of defined benefit plan. + 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 (k)(3) -URI http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920 + Details
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