Borrowings - Promissory Notes (Details)	1 Months Ended	12 Months Ended
	Jun. 30, 2017 USD ($) vehicle	Dec. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)
Debt Instrument [Line Items]
Interest expense		$ 113,300,000	$ 94,000,000.0	$ 82,100,000
Number of derivatives settled | vehicle	2
Debt principal amount		$ 2,097,600,000	$ 1,981,100,000
LIBOR rate
Debt Instrument [Line Items]
Applicable margin over base rate		1.50%
Promissory Notes Due July 15, 2019
Debt Instrument [Line Items]
Interest expense				$ 0
Debt principal amount	$ 53,900,000
Promissory Notes Due July 15, 2019 | LIBOR rate
Debt Instrument [Line Items]
Applicable margin over base rate	2.00%