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Stockholders' Equity (Details) - USD ($) shares in Thousands, $ in Millions	12 Months Ended			35 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2021	Nov. 03, 2021	Feb. 13, 2019
Stockholders' Equity Note [Abstract]
Stock Repurchased and Retired During Period, Shares	8,600	2,600	7,600
Stock Repurchased During Period, Value	$ 540	$ 100	$ 337	$ 977
Stock Repurchased During Period, Shares				18,800
Number of treasury shares retired	8,900	2,800
Stock Repurchase Program, Authorized Amount					$ 1,500	$ 1,000

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- Definition

Amount of stock repurchase plan authorized.

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Number of shares that have been repurchased and retired during the period.

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- Definition

Number of shares that have been repurchased during the period and have not been retired and are not held in treasury. Some state laws may govern the circumstances under which an entity may acquire its own stock and prescribe the accounting treatment therefore. This element is used when state law does not recognize treasury stock.

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Equity impact of the value of stock that has been repurchased during the period and has not been retired and is not held in treasury. Some state laws may mandate the circumstances under which an entity may acquire its own stock and prescribe the accounting treatment therefore. This element is used when state law does not recognize treasury stock.

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Number of shares of common and preferred stock retired from treasury during the period.

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