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Share-Based Compensation - Compensation Expense and Related Income Tax Benefit (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]      
Total compensation expense $ 59 $ 60 $ 53
Income tax benefit 9 9 10
Unearned compensation costs related to awards granted $ 82    
Unearned compensation cost, expected to be recognized over period 1 year 8 months 12 days    
Cost of sales      
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]      
Total compensation expense $ 6 4 4
Selling and marketing      
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]      
Total compensation expense 16 17 13
Research and development      
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]      
Total compensation expense 16 16 15
General and administration      
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]      
Total compensation expense $ 21 $ 23 $ 21