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Share-Based Payments (Components of share-based compensation expense) (Details) - USD ($)
$ / shares in Units, $ in Millions
12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Share-based compensation expense—total [1] $ 62 $ 58 $ 59
Tax benefit for share-based compensation expense (8) (7) (7)
Share-based compensation expense, net of tax 54 51 52
Share-based compensation expense capitalized (less than) $ 1 1 1
Share-based Compensation Arrangements by Share-based Payment Award, Options, Grants in Period, Weighted Average Exercise Price $ 201.23    
Deferred Stock Units (DSUs)      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Granted (in shares) 0    
Stock options / stock appreciation rights      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Share-based compensation expense $ 10 9 9
RSUs / DSUs      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Share-based compensation expense [2] $ 34 33 31
PSUs      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Granted (in shares) 104,113    
Share-based compensation expense $ 18 $ 16 $ 19
[1] For each of the years ended December 31, 2022, 2021 and 2020, we capitalized less than $1 million of share-based compensation expense to inventory
[2]