Commitments and Contingencies (Details)	1 Months Ended		9 Months Ended
	Sep. 30, 2020 USD ($)	Sep. 30, 2019 USD ($)	Sep. 30, 2020 USD ($) credit_agreement	Dec. 31, 2019 USD ($)
Line of Credit Facility [Line Items]
Number of credit agreements | credit_agreement			2
Indemnification claims	$ 0		$ 0
Contingent liabilities	0		0	$ 0
Revolving Credit Facility
Line of Credit Facility [Line Items]
Line of credit facility, maximum borrowing capacity	2,000,000,000.0	$ 500,000,000.0	2,000,000,000.0
Line of credit facility additional borrowing capacity	$ 500,000,000.0	$ 500,000,000.0	$ 500,000,000.0
Debt covenant, consolidated leverage ratio			3.50
Debt covenant, increase in consolidated leverage ratio			4.00
Debt covenant, interest coverage ratio			2.50
Revolving Credit Facility | Base Rate | Minimum
Line of Credit Facility [Line Items]
Basis spread on variable rate (as a percent)	0.50%	0.125%
Revolving Credit Facility | Base Rate | Maximum
Line of Credit Facility [Line Items]
Basis spread on variable rate (as a percent)	0.875%	0.50%
Revolving Credit Facility | Eurodollar | Minimum
Line of Credit Facility [Line Items]
Basis spread on variable rate (as a percent)	1.50%	1.125%
Revolving Credit Facility | Eurodollar | Maximum
Line of Credit Facility [Line Items]
Basis spread on variable rate (as a percent)	1.875%	1.50%
Letters of Credit
Line of Credit Facility [Line Items]
Line of credit facility, maximum borrowing capacity		$ 50,000,000.0