Earnings Per Share (Details) - shares shares in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Earnings Per Share [Abstract]
Weighted average number of shares outstanding - basic	97	111	123
Dilutive effect of employee stock plans	1	1	0
Weighted average number of shares outstanding, diluted	98	112	123
Adjusted weighted average shares	98	112	123
Antidilutive securities excluded from computation of earnings per share (in shares)			1