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Equity Equity Repurchase Program (Details) - USD ($) shares in Millions, $ in Millions	1 Months Ended	9 Months Ended
	Oct. 27, 2021	Sep. 30, 2021	Sep. 30, 2020	Oct. 01, 2021	Apr. 01, 2021	Jan. 01, 2021
Equity, Class of Treasury Stock [Line Items]
Value of shares acquired		$ 1,200	$ 150
Number of shares acquired		19.0	2.7
Stock repurchase authorization amount				$ 3,000	$ 2,500	$ 1,500
Subsequent Event [Member]
Equity, Class of Treasury Stock [Line Items]
Value of shares acquired	$ 108
Number of shares acquired	1.5

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Amount of stock repurchase plan authorized.

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Number of shares that have been repurchased during the period and are being held in treasury.

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Equity impact of the cost of common and preferred stock that were repurchased during the period. Recorded using the cost method.

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