Long-Term Debt and Revolving Credit Agreements - Schedule of Long-Term Debt (Details) - USD ($) $ in Millions	Mar. 31, 2021	Feb. 28, 2021	Dec. 31, 2020
Line of Credit Facility [Line Items]
Principal amount	$ 500		$ 370
Deferred issuance costs	(6)		0
Less: current portion	0		(22)
Long-term debt, noncurrent	$ 494		$ 348
Annual contractual interest rate	3.50%		1.77%
Effective interest rate	3.67%		1.87%
2018 Term Loan A | Loans Payable
Line of Credit Facility [Line Items]
Principal amount	$ 0		$ 370
2029 Notes Payable | Loans Payable
Line of Credit Facility [Line Items]
Principal amount		$ 500	$ 0