Preferred and Common Stock - Schedule of Share Activity (Details) - shares	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Common stock outstanding, beginning balance (in shares)	433,000,000
Common stock outstanding, ending balance (in shares)	432,906,377	433,000,000
Common stock
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Common stock outstanding, beginning balance (in shares)	432,855,183	483,270,717	481,416,537
Issued for stock-based compensation plans (in shares)	3,896,119	4,436,830	1,854,180
Repurchase and retirement of common stock (in shares)	(3,844,925)	(54,852,364)
Common stock outstanding, ending balance (in shares)	432,906,377	432,855,183	483,270,717