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Retirement Benefit Plans (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Defined Benefit Plan Disclosure [Line Items] |  |  |
Funded status of plan | $ (208) | $ (200) |
Defined contribution expense | 37 | 35 | $ 34
Defined benefit pension expense | 45 | 8 | 12
Other postretirement employee benefit expense |  |  | 1
Total | 82 | 43 | 47
Pension settlement loss | 27 | 0 | $ 0
United States |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Funded status of plan | (22) | (37) |
Other |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Funded status of plan | (79) | (68) |
Germany |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Funded status of plan | $ (107) | $ (95) |
Pension Plan [Member] | United States |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Defined Benefit Plan, Plan Assets, Actual Allocation, Percentage | 100.00% | 100.00% |
Funded status of plan | $ (22) | $ (37) |
Defined Benefit Plan, Benefit Obligation, Payment for Settlement | 50 |  |
Defined Benefit Plan, Plan Assets Level 3 Reconciliation, Decrease for Settlement | 50 |  |
Defined Benefit Plan, Benefit Obligation, Benefits Paid | $ 15 | $ 21 |
Pension Plan [Member] | Non-US [Member] |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Defined Benefit Plan, Plan Assets, Actual Allocation, Percentage | 100.00% | 100.00% |
Funded status of plan | $ (190) | $ (174) |
Defined Benefit Plan, Benefit Obligation, Benefits Paid | 16 | 20 |
Other Postretirement Benefits Plan [Member] |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Funded status of plan | (81) | (87) |
Defined Benefit Plan, Benefit Obligation, Benefits Paid | 12 | $ 17 |
Former Employees [Member] | Pension Plan [Member] | United States |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Defined Benefit Plan, Benefit Obligation, Payment for Settlement | 65 |  |
Defined Benefit Plan, Benefit Obligation, Benefits Paid | 15 |  |
Pension settlement loss | $ 27 |  |

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- Definition Amount of payment to participant of defined benefit plan which decreases benefit obligation. For pension plan, payment includes, but is not limited to, pension benefits and death benefits. For other postretirement plan, payment includes, but is not limited to, prescription drug benefits, health care benefits, life insurance benefits, and legal, educational and advisory services. + 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 (a)(6) -URI http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 60 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=6414203&loc=d3e39716-114964 + Details
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- Definition Amount of payment, which decreases benefit obligation of defined benefit plan, for irrevocable action relieving primary responsibility for benefit obligation and eliminating risk for obligation and assets used to effect settlement. Transaction constituting settlement includes, but is not limited to, making lump-sum cash payment to participant in exchange for their rights to receive specified benefits and purchasing nonparticipating annuity contract. Excludes decreases to benefit obligation for remeasurement due to settlement. + 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 (a)(10) -URI http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 30 -Section 15 -Paragraph 6 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=7577095&loc=d3e8001-114927 + Details
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- Definition Amount of gain (loss) recognized in net periodic benefit (cost) credit from irrevocable action relieving primary responsibility for benefit obligation and eliminating risk related to obligation and assets used to effect settlement. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (h)(7) -URI http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 6 -Subparagraph (a)(7) -URI http://asc.fasb.org/extlink&oid=118255775&loc=d3e2709-114920 + Details
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