Long-Term Debt (Equity Units) (Details) - USD ($) shares in Millions			12 Months Ended
	Feb. 01, 2020	Nov. 01, 2019	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Financial Instruments Subject to Mandatory Redemption by Settlement Terms [Line Items]
Total Net Proceeds		$ 1,265,000,000	$ 0	$ 0	$ 1,265,000,000
Total Long-Term Debt			4,535,000,000
Equity units subject to mandatory redemption
Financial Instruments Subject to Mandatory Redemption by Settlement Terms [Line Items]
Units Issued (in shares)		26
Stock Purchase Contract Annual Rate	4.00%	4.00%
Stock Purchase Contract Liability		$ 150,000,000	51,000,000	101,000,000
Payments			$ 50,000,000	$ 49,000,000
November 2019 Equity Units Maturing 2025 | Equity Units
Financial Instruments Subject to Mandatory Redemption by Settlement Terms [Line Items]
Total Long-Term Debt		$ 1,300,000,000
RSN Annual Interest Rate		2.25%