Debt - Additional Information (Details)			1 Months Ended							12 Months Ended
	Jun. 01, 2020 USD ($)	Apr. 30, 2018 USD ($)	May 31, 2021 USD ($)	Mar. 31, 2021 USD ($)	Jan. 31, 2021 USD ($)	Jun. 30, 2020 USD ($)	May 31, 2020 USD ($)	Apr. 30, 2020 USD ($)	Feb. 29, 2020 USD ($)	Dec. 31, 2021	Dec. 31, 2020
Two Point Eighty-five Percent Medium-Term Notes Due 2021 | Medium-term Notes
Debt Instrument [Line Items]
Extinguishment of debt, amount					$ 600,000,000
Extinguishment of debt, stated interest rate					2.85%
Floating-Rate Medium Term Notes due 2021 | Medium-term Notes
Debt Instrument [Line Items]
Extinguishment of debt, amount				$ 450,000,000
Three Point Fifty-five Percent Medium Term Notes due 2021 | Medium-term Notes
Debt Instrument [Line Items]
Extinguishment of debt, amount			$ 350,000,000
Extinguishment of debt, stated interest rate			3.55%
2.15% Medium-term notes due 2020 | Medium-term Notes
Debt Instrument [Line Items]
Extinguishment of debt, amount									$ 600,000,000
Extinguishment of debt, stated interest rate									2.15%
Floating-Rate Medium Term Notes due 2020 | Medium-term Notes
Debt Instrument [Line Items]
Extinguishment of debt, amount							$ 450,000,000
Two Point Four Percent Medium-Term Notes Due 2020 | Medium-term Notes
Debt Instrument [Line Items]
Extinguishment of debt, amount						$ 350,000,000
Extinguishment of debt, stated interest rate						2.40%
Revolving Credit Facility | Credit Facility Maturing April 2025, Five Year Term
Debt Instrument [Line Items]
Debt instrument, term								5 years
Revolving Credit Facility | Variable Rate Notes Maturing May 2021
Debt Instrument [Line Items]
Debt instrument, term	364 days
Line of credit, maximum borrowing capacity	$ 350,000,000
Line of Credit | Credit Facility Maturing April 2025, Five Year Term
Debt Instrument [Line Items]
Debt instrument, term								5 years
Line of credit, maximum borrowing capacity								$ 707,500,000
Line of Credit | Credit Facility Maturing April 2021, Five Year Term
Debt Instrument [Line Items]
Debt instrument, term								5 years
Line of credit, maximum borrowing capacity		$ 765,000,000
Line of Credit | Credit Facility Maturing April 2023, Five Year Maturity
Debt Instrument [Line Items]
Debt instrument, term		5 years
Line of credit, maximum borrowing capacity		$ 780,000,000						$ 707,500,000
Line of Credit | Global Credit Facilities
Debt Instrument [Line Items]
Debt instrument, term										5 years
Covenant, debt to equity ratio, excluding subsidiary debt (cannot exceed)										10.0
Covenant, debt to equity ratio, excluding subsidiary debt										0.7
Unsecured Commercial Paper
Debt Instrument [Line Items]
Debt instrument, term										365 days
Weighted-average interest rate of commercial paper										0.40%	1.34%