Earnings Per Share - Antidilutive Stock Options Excluded from Diluted Earnings Per Share Calculation (Details) - shares shares in Millions		3 Months Ended		6 Months Ended
		Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Stock Options
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive Stock Options Excluded from Diluted EPS (in shares)	[1]	2.0	7.0	2.0	5.0

[1] All prior period share and per share data has been retroactively adjusted to reflect the stock split effective June 28, 2021.