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Stock Repurchase Activity (Details) - USD ($)	3 Months Ended				6 Months Ended
Stock Repurchase Activity (Details) - USD ($)	Sep. 30, 2023	Jun. 30, 2023	Sep. 30, 2022	Jun. 30, 2022	Sep. 30, 2023	Mar. 31, 2023	Nov. 30, 2021
Equity [Abstract]
Stock repurchase program, authorized amount							$ 4,000,000,000
Repurchased shares under authorization (in shares)	4,200,000				6,000,000
Repurchased shares under authorization, value	$ 342,300,000	$ 141,200,000	$ 247,200,000	$ 195,200,000	$ 483,500,000
Stock repurchase program, remaining authorized repurchase amount	$ 2,150,000,000				$ 2,150,000,000
Common stock held in treasury (in shares)	36,762,009				36,762,009	32,345,809