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Incentive Stock Program - Options (Details) - Share-based Payment Arrangement, Option
$ / shares in Units, $ in Millions
9 Months Ended
Sep. 30, 2022
USD ($)
$ / shares
shares
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]  
Stock options outstanding, number of shares | shares 29,048,449
Exercisable options, number of shares | shares 23,310,464
Stock options outstanding, weighted-average remaining life 5 years 4 months 24 days
Exercisable options, weighted-average remaining life 4 years 7 months 6 days
Stock options outstanding, weighted-average exercise price (in dollars per share) | $ / shares $ 70.22
Exercisable options, weighted-average exercise price (in dollars per share) | $ / shares $ 59.69
Aggregate intrinsic value of options outstanding | $ $ 901
Aggregate intrinsic value of options exercisable | $ $ 890