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Earnings per Share (Tables)
 9 Months Ended
Sep. 30, 2025
Earnings Per Share [Abstract]  
Schedule of Components of Basic and Diluted Earnings Per Share The components of basic and diluted earnings per share are as follows:
 Three Months Ended
September 30,		Nine Months Ended September 30,
In millions, except per share amounts2025202420252024
Net income attributable to common stockholders$40 $32 $93 $89 
Weighted average outstanding shares of common stock94.2 96.1 94.9 96.7 
Dilutive effect of employee stock options, restricted stock and other stock awards1.3 0.9 1.6 1.6 
Common stock and common stock equivalents95.5 97.0 96.5 98.3 
Net income per share:
Basic$0.42 $0.33 $0.98 $0.92 
Diluted$0.42 $0.33 $0.96 $0.91