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Employee Benefit Plans - Additional Information (Details) $ in Millions | 12 Months Ended |
--- | --- | ---
Dec. 31, 2019 USD ($) plan | Dec. 31, 2018 USD ($)
Defined Benefit Plan Disclosure [Line Items] |  |
Number of pension plans | plan | 2 |
Estimated contributions in the next fiscal year | $ 7 |
Defined Benefit Plan, Accumulated Benefit Obligation | 154 | $ 125
Underfunded status of Pension Plans | $ 25 | $ 18
U.K. Plan |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Maximum increase in pensionable earnings | 2.00% |
Funded percentage (less than) | 100.00% |
U.K. Plan | Global return fund |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Target allocation in debt securities | 26.00% |
U.K. Plan | Real estate |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Target allocation in debt securities | 6.50% |
U.K. Plan | Liability Driven Investments |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Target allocation in debt securities | 19.00% |
U.K. Plan | Corporate bonds |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Target allocation in debt securities | 11.00% |
U.K. Plan | U.K | Equity securities |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Target allocation in debt securities | 7.30% |
U.K. Plan | Other Than United Kingdom | Equity securities |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Target allocation in debt securities | 30.00% |
Canadian Plan | Corporate bonds |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Target allocation in debt securities | 37.00% |
Canadian Plan | Canada | Equity securities |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Target allocation in debt securities | 22.00% |
Canadian Plan | Other Than Canada | Equity securities |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Target allocation in debt securities | 41.00% |

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- Definition Defined Benefit Plan, Plan Amendments, Maximum Annual Increase for Pensionable Earnings While Plan is Not 100 Percent Funded + References No definition available. + Details
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