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Share-Based Compensation - Summary of Reflexis Replacement Options (Details) - Reflexis Replacement Options
$ / shares in Units, $ in Millions
12 Months Ended
Dec. 31, 2020
USD ($)
$ / shares
shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Weighted average acquisition-date fair value per option (in USD per share) $ 230
Share based payment award options grants In period fair value | $ $ 9
Share-based payment award, award requisite service period 1 year 8 months 12 days
Expected dividend yield 0.00%
Volatility factor 39.75%
Risk free interest rate 0.14%
Expected weighted-average life 2 years 9 months 10 days
Reflexis Replacement Options  
Outstanding at beginning of year (in shares) | shares 0
Granted (in shares) | shares 38,228
Exercised (in shares) | shares (3,408)
Forfeited (in shares) | shares (396)
Expired (in shares) | shares 0
Outstanding at end of year (in shares) | shares 34,424
Exercisable at end of period (in shares) | shares 6,716
Weighted- Average Exercise  Price  
Outstanding at beginning of year (in USD per share) $ 0
Granted (in USD per share) 57.82
Exercised (in USD per share) 55.79
Forfeited (in USD per share) 52.14
Expired (in USD per share) 0
Outstanding at end of year (in USD per share) 58.09
Exercisable at end of year (in USD per share) $ 56.77
Aggregate intrinsic value, outstanding | $ $ 11
Weighted-average remaining contractual term, outstanding 7 years 4 months 24 days
Aggregate intrinsic value, exercisable | $ $ 2
Weighted-average remaining contractual term, exercisable 7 years 3 months 18 days
Intrinsic value for options exercised | $ $ 1
Fair value vested | $ $ 2