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Indebtedness - Senior Credit Facilities (Details) | Dec. 17, 2019 USD ($) | Dec. 31, 2020 USD ($)
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Senior Credit Facilities | Senior credit facility |  |
Line of Credit Facility [Line Items] |  |
Consolidated leverage ratio | 3.75 |
Consolidated leverage ratio after certain permitted acquisitions | 4.25 |
Consolidated interest coverage ratio | 3.00 |
Term loan | Term loans |  |
Line of Credit Facility [Line Items] |  |
Face amount of debt | $ 250,000,000.0 | $ 250,000,000.0
Global Revolving Commitment Fee | Domestic Revolving Commitment Fee |  |
Line of Credit Facility [Line Items] |  |
Maximum borrowing capacity under financing arrangement | 300,000,000.0 |
Global Revolving Commitment Fee | Foreign credit instrument facility |  |
Line of Credit Facility [Line Items] |  |
Maximum borrowing capacity under financing arrangement | 150,000,000.0 |
Global Revolving Commitment Fee | Senior Credit Facilities | Senior credit facility |  |
Line of Credit Facility [Line Items] |  |
Maximum borrowing capacity under financing arrangement | 800,000,000.0 |
Global Revolving Commitment Fee | Participation Foreign Credit Instrument Facility | Letters of credit and guarantees |  |
Line of Credit Facility [Line Items] |  |
Maximum borrowing capacity under financing arrangement | 55,000,000.0 |
Global Revolving Commitment Fee | Bilateral foreign credit instrument facility | Letters of credit and guarantees |  |
Line of Credit Facility [Line Items] |  |
Maximum borrowing capacity under financing arrangement | $ 45,000,000.0 |

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