Stockholders' Equity (Common Stock Repurchase Program) (Details) - USD ($) shares in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Repurchase of common stock shares	(4,700)	(17,700)	(28,200)
Repurchase of common stock, value	$ (51,000,000)	$ (281,000,000)	$ (378,000,000)
Payments for Repurchase of Common Stock	51,000,000	281,000,000	378,000,000
Stock Repurchased During Period, Average Repurchase Price (in dollars per share)	10.78	15.96	13.33
Stock Repurchase Program, Remaining Authorized Repurchase Amount	1,000,000,000
Stock Repurchased During Period Settled After Period - Value		$ (24,000,000)
Stock Repurchased During Period Settled After - Shares		(1,600)
Common Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Repurchase of common stock shares		(17,700)
Repurchase of common stock, value	$ 0	$ 0	$ (1,000,000)