Earnings per Share - Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share (Details) - shares shares in Millions	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Earnings Per Share, Basic and Diluted [Line Items]
Anti-dilutive shares excluded from calculation of Weighted average shares outstanding – diluted (in shares)	8	1
Stock-based compensation awards
Earnings Per Share, Basic and Diluted [Line Items]
Anti-dilutive shares excluded from calculation of Weighted average shares outstanding – diluted (in shares)	4	1
5% Convertible Notes
Earnings Per Share, Basic and Diluted [Line Items]
Anti-dilutive shares excluded from calculation of Weighted average shares outstanding – diluted (in shares)	4	0