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Amount of tax benefit from exercise of option under share-based payment arrangement.

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The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

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The weighted average fair value at grant date for nonvested equity-based awards issued during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Amount of accumulated difference between fair value of underlying shares on dates of exercise and exercise price on options exercised (or share units converted) into shares.

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Gross number of share options (or share units) granted during the period.

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Number of shares issued under share-based payment arrangement.

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Period from grant date that an equity-based award expires, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Share-Based Compensation and Other Compensation Arrangements - Narrative (Details) $ / shares in Units, $ in Millions							1 Months Ended			12 Months Ended
	Mar. 11, 2024 $ / shares shares	Feb. 20, 2024 $ / shares shares	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
Share-based compensation arrangement by share-based payment award, purchase period										3 months
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
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 in period, weighted average grant date fair value (in shares) \| $ / 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
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted (in shares)	125,432	2,008,499
Granted in period, weighted average grant date fair value (in shares) \| $ / shares	$ 192.94	$ 204.15
Restricted stock units \| Executive Long-Term Incentive Program
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted (in shares)				2,568,112			327,523	1,804,541	980,077
Granted in period, weighted average grant date fair value (in shares) \| $ / shares				$ 157.69			$ 214.35	$ 217.48	$ 215.7
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
Granted (in shares)	153,306		199,899
Granted in period, weighted average grant date fair value (in shares) \| $ / shares	$ 192.94		$ 214.35
Performance Restricted Stock Units (PRSU) \| Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award payout percentage	0.00%		0.00%
Performance Restricted Stock Units (PRSU) \| Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award payout percentage	200.00%		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, 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