Earnings Per Share (Schedule of Basic and Diluted Earnings Per Share) (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions		3 Months Ended
		Mar. 31, 2022	Mar. 31, 2021
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Net income		$ 2	$ 5
Weighted-average common shares outstanding		82.3	85.4
Weighted-average common shares outstanding - assuming dilution		82.6	86.0
Basic earnings per share (in dollars per share)		$ 0.02	$ 0.06
Diluted earnings per share (in dollars per share)		$ 0.02	$ 0.06
RSU [Member]
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Effect of dilutive securities	[1]	0.3	0.4
Antidilutive securities excluded from computation of diluted earnings per share (in shares)		0.4	0.0
Stock Options [Member]
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Effect of dilutive securities	[2]		0.2
Antidilutive securities excluded from computation of diluted earnings per share (in shares)		1.2	0.0

[1] RSUs of 0.4 million shares for the three months ended March 31, 2022 were not included in the diluted earnings per share calculation because their effect would have been anti-dilutive. There were no such anti-dilutive RSUs for the three months ended March 31, 2021.

[2] Options to purchase 1.2 million shares for the three months ended March 31, 2022 were not included in the diluted earnings per share calculation because their effect would have been anti-dilutive. There were no such anti-dilutive options for the three months ended March 31, 2021.