Share-Based Compensation and Other Compensation Arrangements - Narrative (Details) $ / shares in Units, $ in Millions					1 Months Ended			12 Months Ended
	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