Stock Compensation Plans Stock Awards (Details 2) - USD ($) $ / shares in Units, shares in Thousands, $ in Millions	12 Months Ended
Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Share-based Compensation by Share-based Payment Award
Stock awards, outstanding, weighted average remaining contractual terms	1 year 3 months 18 days	1 year 4 months 24 days	1 year 4 months 24 days	1 year 4 months 24 days
Stock issued, settlement of fully vested stock awards, fair value grant date	$ 99	$ 93	$ 103
Stock Award Activity (Table)
Stock awards - outstanding at period start	561	580	603
Stock awards - granted	216	238	304
Stock awards - vested	249	226	269
Stock awards - forfeited	29	31	58
Stock awards - outstanding at period end	499	561	580	603
Stock Awards, Weighted Average Grant Date Fair Value [Table]
Weighted-average grant date fair value - outstanding at period start	$ 344	$ 314	$ 311
Weighted-average grant date fair value - granted	478	397	296
Weighted-average grant date fair value - vested	315	327	286
Weighted-average grant date fair value - forfeited	373	320	318
Weighted-average grant date fair value - outstanding at period end	$ 417	$ 344	$ 314	$ 311
Amended 2011 Plan [Domain]
Share-based Compensation by Share-based Payment Award
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant	5,100
Share-based Compensation Arrangement by Share-based Payment Award, Number of Additional Shares Authorized	2,400
2011 Long-Term Incentive Stock Plan [Member]
Share-based Compensation by Share-based Payment Award
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant	4,400

Stock Issued During Period, Fair Value Grant Date, Share-based Compensation

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The number of equity-based payment instruments, excluding stock (or unit) options, that were forfeited during the reporting period.

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Weighted average fair value as of the grant date of equity-based award plans other than stock (unit) option plans that were not exercised or put into effect as a result of the occurrence of a terminating event.

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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 number of non-vested equity-based payment instruments, excluding stock (or unit) options, that validly exist and are outstanding as of the balance sheet date.

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Per share or unit weighted-average fair value of nonvested award under share-based payment arrangement. Excludes share and unit options.

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Weighted average remaining contractual term for equity-based awards excluding options, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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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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The difference between the maximum number of shares (or other type of equity) authorized for issuance under the plan (including the effects of amendments and adjustments), and the sum of: 1) the number of shares (or other type of equity) already issued upon exercise of options or other equity-based awards under the plan; and 2) shares (or other type of equity) reserved for issuance on granting of outstanding awards, net of cancellations and forfeitures, if applicable.

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