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Debt - Narrative (Details) - Senior Unsecured Notes - USD ($) | 3 Months Ended |
--- | --- | ---
Mar. 31, 2021 | Aug. 31, 2020
Line of Credit Facility [Line Items] |  |
Interest expense | $ 11,100,000 |
1.750% Senior Notes due September 2030 |  |
Line of Credit Facility [Line Items] |  |
Debt, principal amount |  | $ 1,250,000,000
2.800% Senior Notes due September 2050 |  |
Line of Credit Facility [Line Items] |  |
Debt, principal amount |  | $ 750,000,000

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