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Retirement Benefit Plans - Asset Allocations (Details) - USD ($) $ in Millions | Dec. 31, 2019 | Dec. 31, 2018
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Defined Benefit Plan, Plan Assets, Allocations [Abstract] |  |
Defined Benefit Plan, Estimated Future Employer Contributions in Next Fiscal Year, Under Contractual Obligation | $ 4 |
United States | Pension Plan [Member] |  |
Defined Benefit Plan, Plan Assets, Allocations [Abstract] |  |
Defined Benefit Plan, Plan Assets, Actual Allocation, Percentage | 100.00% | 100.00%
United States | Pension Plan [Member] | Real estate and other |  |
Defined Benefit Plan, Plan Assets, Allocations [Abstract] |  |
Defined Benefit Plan, Plan Assets, Actual Allocation, Percentage | 16.00% | 11.00%
United States | Pension Plan [Member] | Fixed income securities |  |
Defined Benefit Plan, Plan Assets, Allocations [Abstract] |  |
Defined Benefit Plan, Plan Assets, Actual Allocation, Percentage | 50.00% | 56.00%
United States | Pension Plan [Member] | Equity securities |  |
Defined Benefit Plan, Plan Assets, Allocations [Abstract] |  |
Defined Benefit Plan, Plan Assets, Actual Allocation, Percentage | 34.00% | 33.00%
Non-US [Member] | Pension Plan [Member] |  |
Defined Benefit Plan, Plan Assets, Allocations [Abstract] |  |
Defined Benefit Plan, Plan Assets, Actual Allocation, Percentage | 100.00% | 100.00%
Non-US [Member] | Pension Plan [Member] | Fixed income securities |  |
Defined Benefit Plan, Plan Assets, Allocations [Abstract] |  |
Defined Benefit Plan, Plan Assets, Actual Allocation, Percentage | 33.00% | 55.00%
Non-US [Member] | Pension Plan [Member] | Equity securities |  |
Defined Benefit Plan, Plan Assets, Allocations [Abstract] |  |
Defined Benefit Plan, Plan Assets, Actual Allocation, Percentage | 37.00% | 37.00%
Non-US [Member] | Pension Plan [Member] | Insurance contract, real estate and other [Member] |  |
Defined Benefit Plan, Plan Assets, Allocations [Abstract] |  |
Defined Benefit Plan, Plan Assets, Actual Allocation, Percentage | 30.00% | 8.00%
Minimum [Member] |  |
Defined Benefit Plan, Plan Assets, Allocations [Abstract] |  |
Defined Benefit Plan, Expected Future Employer Contributions, Next Fiscal Year | $ 10 |
Minimum [Member] | United States | Pension Plan [Member] | Real estate and other |  |
Defined Benefit Plan, Plan Assets, Allocations [Abstract] |  |
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage | 0.00% |
Minimum [Member] | United States | Pension Plan [Member] | Fixed income securities |  |
Defined Benefit Plan, Plan Assets, Allocations [Abstract] |  |
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage | 45.00% |
Minimum [Member] | United States | Pension Plan [Member] | Equity securities |  |
Defined Benefit Plan, Plan Assets, Allocations [Abstract] |  |
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage | 25.00% |
Minimum [Member] | Non-US [Member] | Pension Plan [Member] | Fixed income securities |  |
Defined Benefit Plan, Plan Assets, Allocations [Abstract] |  |
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage | 29.00% |
Minimum [Member] | Non-US [Member] | Pension Plan [Member] | Equity securities |  |
Defined Benefit Plan, Plan Assets, Allocations [Abstract] |  |
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage | 30.00% |
Minimum [Member] | Non-US [Member] | Pension Plan [Member] | Insurance contract, real estate and other [Member] |  |
Defined Benefit Plan, Plan Assets, Allocations [Abstract] |  |
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage | 0.00% |
Maximum [Member] |  |
Defined Benefit Plan, Plan Assets, Allocations [Abstract] |  |
Defined Benefit Plan, Expected Future Employer Contributions, Next Fiscal Year | $ 20 |
Maximum [Member] | United States | Pension Plan [Member] | Real estate and other |  |
Defined Benefit Plan, Plan Assets, Allocations [Abstract] |  |
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage | 15.00% |
Maximum [Member] | United States | Pension Plan [Member] | Fixed income securities |  |
Defined Benefit Plan, Plan Assets, Allocations [Abstract] |  |
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage | 65.00% |
Maximum [Member] | United States | Pension Plan [Member] | Equity securities |  |
Defined Benefit Plan, Plan Assets, Allocations [Abstract] |  |
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage | 45.00% |
Maximum [Member] | Non-US [Member] | Pension Plan [Member] | Fixed income securities |  |
Defined Benefit Plan, Plan Assets, Allocations [Abstract] |  |
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage | 62.00% |
Maximum [Member] | Non-US [Member] | Pension Plan [Member] | Equity securities |  |
Defined Benefit Plan, Plan Assets, Allocations [Abstract] |  |
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage | 43.00% |
Maximum [Member] | Non-US [Member] | Pension Plan [Member] | Insurance contract, real estate and other [Member] |  |
Defined Benefit Plan, Plan Assets, Allocations [Abstract] |  |
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage | 36.00% |

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