Debt - Line of Credit and Commercial Paper - Schedule of Unsecured Revolving Credit Facility (Details) - USD ($)	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Line of Credit Facility [Line Items]
Commercial paper balance outstanding	$ (315,100,000)
Unsecured Revolving Credit Facility [Member]
Line of Credit Facility [Line Items]
Unsecured revolving credit facility commitment	2,500,000,000	$ 2,500,000,000
Commercial paper balance outstanding	(315,121,000)	(415,000,000)
Other restricted amounts	(3,507,000)	(100,949,000)
Unsecured revolving credit facility availability	$ 2,181,372,000	$ 1,984,051,000