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Share-Based Compensation and Other Compensation Arrangements - Narrative (Details) $ / shares in Units, $ in Millions |  |  |  |  | 1 Months Ended | 12 Months Ended
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Feb. 16, 2023 $ / shares shares | Jul. 29, 2022 $ / shares shares | Feb. 16, 2022 shares | Feb. 17, 2021 shares | Feb. 28, 2022 $ / shares shares | Feb. 28, 2021 $ / shares shares | Feb. 28, 2020 $ / shares shares | Dec. 31, 2023 USD ($) fund $ / shares shares | Dec. 31, 2022 USD ($) $ / shares | Dec. 31, 2021 USD ($) $ / shares shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |
Aggregate number of shares of stock available for issuance (in shares) |  |  |  |  |  |  |  | 12,900,000 |  |
Granted (in shares) |  |  |  |  |  |  |  | 30,000 |  |
Share-based compensation arrangement by share-based payment award, options, exercises in period, total intrinsic value | $ |  |  |  |  |  |  |  | $ 80 | $ 75 | $ 84
Share-based payment arrangement, exercise of option, tax benefit | $ |  |  |  |  |  |  |  | $ 18 | 17 | 19
Number of investment funds | fund |  |  |  |  |  |  |  | 23 |  |
Deferred compensation | $ |  |  |  |  |  |  |  | $ 188 | (117) | $ 126
Deferred compensation liability which is being marked to market | $ |  |  |  |  |  |  |  | 1,640 | $ 1,499 |
2022 Stock Options |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |
Unrecognized compensation cost | $ |  |  |  |  |  |  |  | $ 11 |  |
Share-based payment arrangement, nonvested award, cost not yet recognized, period for recognition |  |  |  |  |  |  |  | 1 year 2 months 12 days |  |
Executive Long-Term Incentive Program |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |
Unrecognized compensation cost | $ |  |  |  |  |  |  |  | $ 366 |  |
Number of units, granted (in shares) |  |  |  |  |  |  |  | 411,134 |  |
Stock options |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |
Share-based compensation arrangement by share-based payment award, award vesting period |  |  |  |  |  |  |  | 3 years |  |
Share-based compensation arrangement by share-based payment award, expiration period |  |  |  |  |  |  |  | 10 years |  |
Granted date fair value (in dollars per share) | $ / shares |  |  |  |  |  |  |  |  | $ 83.04 | $ 74.63
Stock options | 2021 Stock Options |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |
Granted (in shares) |  |  | 348,769 | 342,986 |  |  |  |  |  | 148,322
Share-based compensation arrangement by share-based payment award, purchase price of common stock, percent |  |  |  | 120.00% |  |  |  |  |  | 120.00%
Stock options | 2022 Stock Options |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |
Share-based compensation arrangement by share-based payment award, purchase price of common stock, percent |  |  | 120.00% |  |  |  |  |  |  |
Share-based compensation arrangement by share-based payment award, purchase price of common stock, percent (reduced) |  |  | 110.00% |  |  |  |  |  |  |
Stock options | 2021 Stock Options Premium |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |
Granted (in shares) |  |  |  |  |  |  |  |  |  | 40,322
Stock options | 2021 Stock Options Non-Premium |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |
Granted (in shares) |  |  |  |  |  |  |  |  |  | 108,000
Restricted stock units | Executive Long-Term Incentive Program |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |
Number of units, granted (in shares) |  | 2,568,112 |  |  | 327,523 | 1,804,541 | 980,077 |  |  |
Granted date fair value (in dollars per share) | $ / shares |  | $ 157.69 |  |  | $ 214.35 | $ 217.48 | $ 215.70 |  |  |
Performance Restricted Stock Units (PRSU) |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |
Unrecognized compensation cost | $ |  |  |  |  |  |  |  | $ 31 |  |
Share-based payment arrangement, nonvested award, cost not yet recognized, period for recognition |  |  |  |  |  |  |  | 2 years 1 month 6 days |  |
Number of units, granted (in shares) | 199,899 |  |  |  |  |  |  |  |  |
Granted date fair value (in dollars per share) | $ / shares | $ 214.35 |  |  |  |  |  |  |  |  |
Performance Restricted Stock Units (PRSU) | Minimum |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |
Share-based compensation arrangement by share-based payment award, equity instruments other than options, award payout percentage | 0.00% |  |  |  |  |  |  |  |  |
Performance Restricted Stock Units (PRSU) | Maximum |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |
Share-based compensation arrangement by share-based payment award, equity instruments other than options, award payout percentage | 200.00% |  |  |  |  |  |  |  |  |
Performance Based Restricted Stock Units (PBRSUs) |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |
Share-based compensation arrangement by share-based payment award, award vesting period |  |  |  |  |  |  |  | 3 years |  |
Performance Based Restricted Stock Units (PBRSUs) | 2020 PBRSU |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |
Award payout range |  |  |  |  |  |  |  | 0.00% |  |
Performance Based Restricted Stock Units (PBRSUs) | 2020 PBRSU | Minimum |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |
Award payout range |  |  |  |  |  |  |  | 0.00% |  |
Performance Based Restricted Stock Units (PBRSUs) | 2020 PBRSU | Maximum |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |
Award payout range |  |  |  |  |  |  |  | 200.00% |  |
Performance Based Restricted Stock Units (PBRSUs) | 2019 PBRSU | Minimum |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |
Award payout range |  |  |  |  |  |  |  | 0.00% |  |
Performance Based Restricted Stock Units (PBRSUs) | 2019 PBRSU | Maximum |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |
Award payout range |  |  |  |  |  |  |  | 200.00% |  |
Employee Stock |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |
Aggregate number of shares of stock available for issuance (in shares) |  |  |  |  |  |  |  | 12,000,000 |  |
Share-based compensation arrangement by share-based payment award, purchase price of common stock, percent |  |  |  |  |  |  |  | 95.00% |  |
Share-based compensation arrangement by share-based payment award, purchase period |  |  |  |  |  |  |  | 3 months |  |
Share-based compensation arrangement by share-based payment award, shares issued in period (in shares) |  |  |  |  |  |  |  | 216,719 |  |
Employee stock ownership plan (ESOP), weighted average purchase price of shares purchased (in dollars per share) | $ / shares |  |  |  |  |  |  |  | $ 193.52 |  |

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