Common Stock, Preferred Stock and Equity Plans - Share Repurchase Program (Details) - USD ($) shares in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Jun. 30, 2021	Nov. 30, 2020	Jul. 31, 2019	Dec. 31, 2018
Equity, Class of Treasury Stock [Line Items]
Repurchases of common stock	$ 1,425,400,000	$ 539,100,000	$ 186,000,000.0
Share Repurchase Program 2018
Equity, Class of Treasury Stock [Line Items]
Number of shares authorized to be repurchased							$ 500,000,000
Repurchases of common stock (in shares)			0.8
Repurchases of common stock			$ 150,000,000
Share Repurchase Program 2019
Equity, Class of Treasury Stock [Line Items]
Number of shares authorized to be repurchased						$ 500,000,000
Repurchases of common stock (in shares)		2.1	0.2
Repurchases of common stock		$ 464,000,000	$ 36,000,000
Share Repurchase Program 2020
Equity, Class of Treasury Stock [Line Items]
Number of shares authorized to be repurchased					$ 500,000,000
Repurchases of common stock (in shares)	2.0	0.3
Repurchases of common stock	$ 424,900,000	$ 75,100,000
Share Repurchase Program 2021
Equity, Class of Treasury Stock [Line Items]
Number of shares authorized to be repurchased				$ 1,500,000,000
Repurchases of common stock (in shares)	5.3
Repurchases of common stock	$ 1,000,000,000
Number of shares remaining for repurchases	$ 499,700,000