Share-based Compensation - Narrative (Detail) - USD ($)	12 Months Ended
Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Tax (expense) benefits recognized for stock-based compensation	$ 36,000,000	$ 26,000,000	$ 54,000,000
Excess tax benefit related to share-based compensation	9,000,000	4,000,000	32,000,000
Amount received on stock options exercised	$ 71,000,000	59,000,000	62,000,000
Long Term Incentive Plans
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares authorized and available for awards	18,000,000.0
Charges for plan	$ 398,000,000	353,000,000	331,000,000
Unrecognized compensation cost	0	0
Intrinsic value of exercised options	13,000,000	15,000,000	27,000,000
Amount received on stock options exercised	5,000,000	3,000,000	10,000,000
Tax benefit realized from exercise of stock options	$ 36,000,000	$ 24,000,000	$ 58,000,000
Stock options granted in the period (in shares)	0
Long Term Incentive Plans \| Performance Share Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected life	3 years	3 years	3 years
Volatility rate	39.00%	48.00%	46.00%
Weighted-average period for recognition of compensation cost	2 years	1 year 10 months 24 days	1 year 8 months 12 days
Fair value of vested shares	$ 83,000,000	$ 42,000,000	$ 395,000,000
Unrecognized compensation cost	$ 109,000,000	$ 100,000,000	$ 90,000,000
Dividend yield	2.20%	1.60%	1.10%
Relative TSR	(0.20%)	3.40%	6.50%
Long Term Incentive Plans \| Performance Share Units \| Market Performance Conditions
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted average grant date fair value of units granted (in dollars per share)	$ 214.02	$ 188.70	$ 257.18
Shares granted during the period (in shares)	340,757
Long Term Incentive Plans \| Performance Share Units \| Minimum \| Common Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock options granted in the period (in shares)	0
Long Term Incentive Plans \| Performance Share Units \| Maximum \| Common Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock options granted in the period (in shares)	2
Long Term Incentive Plans \| Restricted Share Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period	3 years
Weighted average grant date fair value of units granted (in dollars per share)	$ 178.69	$ 147.73	$ 201.68
Weighted-average period for recognition of compensation cost	1 year 7 months 6 days	1 year 7 months 6 days	1 year 7 months 6 days
Shares granted during the period (in shares)	2,482,405
Fair value of vested shares	$ 372,000,000	$ 319,000,000	$ 533,000,000
Unrecognized compensation cost	$ 685,000,000	$ 621,000,000	$ 546,000,000
Special Termination Benefits \| Long Term Incentive Plans \| Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period	1 year

Employee service share based compensation excess tax benefit from compensation expense portion of excess tax benefits.

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Initial TSR

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Amount of expense for award under share-based payment arrangement. Excludes amount capitalized.

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Amount of tax benefit for recognition of expense of award 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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The estimated dividend rate (a percentage of the share price) to be paid (expected dividends) to holders of the underlying shares over the option's term.

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The estimated measure of the percentage by which a share price is expected to fluctuate during a period. Volatility also may be defined as a probability-weighted measure of the dispersion of returns about the mean. The volatility of a share price is the standard deviation of the continuously compounded rates of return on the share over a specified period. That is the same as the standard deviation of the differences in the natural logarithms of the stock prices plus dividends, if any, over the period.

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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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