Debt - Line of Credit and Commercial Paper - Additional Information (Details) - USD ($)	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Nov. 03, 2019
Line of Credit Facility [Line Items]
Debt instrument, maturity date		Nov. 01, 2024
Commercial paper maximum available	$ 1,000,000,000.0		$ 1,000,000,000.0
Commercial Paper [Member]
Line of Credit Facility [Line Items]
Weighted average interest rates	0.27%	1.72%
Weighted average amount outstanding	$ 471,000,000.0	$ 276,600,000
Commercial paper weighted average days outstanding	27 days	45 days
Unsecured Revolving Credit Facility [Member]
Line of Credit Facility [Line Items]
Unsecured revolving credit facility	$ 2,500,000,000	$ 2,500,000,000
Ability to increase LOC facility		$ 750,000,000.0
Debt instrument, basis spread on variable rate		0.775%
Percentage points of line of credit facility commitment fee		0.125%
Revolving Credit Facility [Member]
Line of Credit Facility [Line Items]
Weighted average interest rates	0.88%	1.47%