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Stock-Based Compensation (Schedule of Stock-Based Compensation Activity) (Details) - Stock Option $ / shares in Units, shares in Thousands, $ in Millions	12 Months Ended
	Dec. 31, 2023 USD ($) $ / shares shares
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding
Outstanding at January 1, 2019 | shares	5,117
Granted | shares	0
Exercised | shares	(847)
Forfeited or expired | shares	(73)
Outstanding at December 31, 2019 | shares	4,197
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price
Outstanding at January 1, Weighted-Average Exercise Price | $ / shares	$ 126.81
Granted, Weighted-Average Exercise Price | $ / shares	0
Exercised, Weighted-Average Exercise Price | $ / shares	114.92
Forfeited or expired, Weighted-Average Exercise Price | $ / shares	126.47
Outstanding at December 31, Weighted-Average Exercise Price | $ / shares	$ 128.80
Exercisable at December 31, 2019 | shares	3,578
Exercisable at December 31, Weighted-Average Exercise Price | $ / shares	$ 128.40
Outstanding at December 31, Weighted-Average Remaining Contractual Term	5 years 14 days
Exercisable at December 31, Weighted-Average Remaining Contractual Term	4 years 6 months 18 days
Outstanding at December 31, Aggregate Intrinsic Value | $	$ 14
Exercisable at December 31, Aggregate Intrinsic Value | $	$ 11

X

- Definition

The number of shares into which fully or partially vested stock options outstanding as of the balance sheet date can be currently converted under the option plan.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 718
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The weighted-average price as of the balance sheet date at which grantees can acquire the shares reserved for issuance on vested portions of options outstanding and currently exercisable under the stock option plan.

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- Definition

For presentations that combine terminations, the number of shares under options that were cancelled during the reporting period as a result of occurrence of a terminating event specified in contractual agreements pertaining to the stock option plan or that expired.

+ References

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Weighted average price of options that were either forfeited or expired.

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

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Amount by which the current fair value of the underlying stock exceeds the exercise price of options outstanding.

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Number of options outstanding, including both vested and non-vested options.

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A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

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Weighted average price at which grantees can acquire the shares reserved for issuance under the stock option plan.

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Weighted average price at which option holders acquired shares when converting their stock options into shares.

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Weighted average per share amount at which grantees can acquire shares of common stock by exercise of options.

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Amount of difference between fair value of the underlying shares reserved for issuance and exercise price of vested portions of options outstanding and currently exercisable.

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Weighted average remaining contractual term for vested portions of options outstanding and currently exercisable or convertible, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Weighted average remaining contractual term for option awards outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Number of share options (or share units) exercised during the current period.

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