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Earnings Per Share (Schedule of Basic and Diluted Earnings Per Share) (Details) - USD ($)
$ / shares in Units, $ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]        
Net income $ 125 $ 111 $ 167 $ 148
Weighted-average common shares outstanding 69,900,000 73,500,000 70,200,000 74,100,000
Weighted-average common shares outstanding - assuming dilution 71,100,000 74,700,000 71,600,000 75,300,000
Basic earnings per share (in dollars per share) $ 1.8 $ 1.51 $ 2.37 $ 2
Diluted earnings per share (in dollars per share) $ 1.76 $ 1.48 $ 2.33 $ 1.96
Restricted Stock Units [Member]        
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]        
Effect of dilutive securities [1] 500,000 700,000 700,000 700,000
Antidilutive securities excluded from computation of diluted earnings per share (in shares) 746 1,304 247,827 389,970
Stock Options [Member]        
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]        
Effect of dilutive securities [2] 400,000 300,000 400,000 300,000
Antidilutive securities excluded from computation of diluted earnings per share (in shares) 552,923 770,881 284,198 438,547
Performance Options [Member]        
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]        
Effect of dilutive securities 300,000 300,000 300,000 300,000
[1] RSUs of 746 shares and 1,304 shares for the three months ended June 30, 2026 and 2025, respectively, and 247,827 shares and 389,970 shares for the six months ended June 30, 2026 and 2025, respectively, were not included in the diluted earnings per share calculation because their effect would have been anti-dilutive.
[2] Stock options to purchase 552,923 shares and 770,881 shares for the three months ended June 30, 2026 and 2025, respectively, and 284,198 shares and 438,547 shares for the six months ended June 30, 2026 and 2025, respectively, were not included in the diluted earnings per share calculation because their effect would have been anti-dilutive.