Debt - Subsequent Event - Narrative (Details) - USD ($) $ in Millions	Nov. 01, 2021	Sep. 30, 2021	Dec. 31, 2020
Debt Instrument [Line Items]
Financing costs		$ 13.6	$ 16.0
Credit Facility
Debt Instrument [Line Items]
Line of credit facility, maximum borrowing capacity		1,750.0
Credit Facility | Revolving commitments
Debt Instrument [Line Items]
Line of credit facility, maximum borrowing capacity		$ 1,350.0
Credit Facility | Subsequent Event
Debt Instrument [Line Items]
Line of credit facility, maximum borrowing capacity	$ 2,000.0
Financing costs	5.0
Credit Facility | Subsequent Event | Revolving commitments
Debt Instrument [Line Items]
Line of credit facility, maximum borrowing capacity	1,650.0
Credit Facility | Subsequent Event | Term Loan
Debt Instrument [Line Items]
Line of credit facility, maximum borrowing capacity	$ 350.0