Stockholders' Equity - Common Stock Repurchased (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Equity [Abstract]
Common stock repurchased (in shares)	16,389,696	19,997,008	16,389,696	29,530,400
Average purchase price per share (in dollars per share)	$ 15.71	$ 18.01	$ 15.71	$ 18.15
Shares repurchased related to employee stock-based compensation plans (in shares)	128,212	196,301	1,077,643	1,130,903
Average purchase price per share (in dollars per share)	$ 14.64	$ 17.45	$ 15.44	$ 18.36
Common shares issued (in shares)	349,009	493,893	2,872,753	3,088,710
Remaining authority under the share repurchase program	$ 326		$ 326