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Stock Repurchase Activity (Details) - USD ($)	12 Months Ended
	Mar. 31, 2023	Mar. 31, 2022	Mar. 31, 2021	Nov. 30, 2021
Equity [Abstract]
Stock repurchase program, authorized amount				$ 4,000,000,000
Repurchased shares under authorization (in shares)	12,900,000	5,600,000	0
Repurchased shares under authorization, value	$ 945,800,000	$ 425,600,000
Stock repurchase program, remaining authorized repurchase amount	$ 2,630,000,000
Common stock held in treasury (in shares)	32,345,809	23,304,872

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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 previously issued common shares repurchased by the issuing entity and held in treasury.

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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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