Earnings Per Share (Schedule of Basic and Diluted Earnings Per Share) (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions		3 Months Ended		6 Months Ended
		Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Net income		$ 33	$ 40	$ 35	$ 45
Weighted-average common shares outstanding		82.1	85.5	82.2	85.5
Weighted-average common shares outstanding - assuming dilution		82.2	86.0	82.4	86.0
Basic earnings per share (in dollars per share)		$ 0.40	$ 0.47	$ 0.42	$ 0.53
Diluted earnings per share (in dollars per share)		$ 0.40	$ 0.47	$ 0.42	$ 0.53
Basic		82.1	85.5	82.2	85.5
RSU [Member]
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Effect of dilutive securities	[1]		0.2		0.3
Antidilutive securities excluded from computation of diluted earnings per share (in shares)		1.0	0.2	0.9	0.1
Stock Options [Member]
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Effect of dilutive securities	[2]	0.1	0.2	0.2	0.2
Antidilutive securities excluded from computation of diluted earnings per share (in shares)		1.6	0.2	1.4	0.1

[1] RSUs of 1.0 million and 0.2 million shares for the three months ended June 30, 2022 and 2021, respectively, and 0.9 million and 0.1 million shares for the six months ended June 30, 2022 and 2021, respectively, were not included in the diluted earnings per share calculation because their effect would have been anti-dilutive.

[2] Options to purchase 1.6 million and 0.2 million shares for the three months ended June 30, 2022 and 2021, respectively, and 1.4 million and 0.1 million shares for the six months ended June 30, 2022 and 2021, respectively, were not included in the diluted earnings per share calculation because their effect would have been anti-dilutive.