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Stock Repurchase Activity (Details) - USD ($)	12 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Mar. 31, 2020	Nov. 30, 2021
Equity [Abstract]
Stock repurchase program, authorized amount				$ 4,000,000,000
Repurchased shares under authorization (in shares)	5,600,000	0	0
Repurchased shares under authorization, value	$ 425,600,000
Stock repurchase program, remaining authorized repurchase amount	$ 3,570,000,000
Treasury stock (in shares)	23,304,872	21,900,970

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Amount of stock repurchase plan authorized.

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Amount remaining of a stock repurchase plan authorized.

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Number of common and preferred shares that were previously issued and that were repurchased by the issuing entity and held in treasury on the financial statement date. This stock has no voting rights and receives no dividends.

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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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