Stockholders' Equity - Common Stock Outstanding (Details) - USD ($)	12 Months Ended			20 Months Ended
	Aug. 31, 2023	Aug. 31, 2022	Aug. 31, 2021	Feb. 28, 2023	Sep. 30, 2023	Sep. 30, 2022	Jul. 31, 2021
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Common stock outstanding, beginning balances (in shares)	135,493,980
Common stock outstanding, ending balance (in shares)	131,294,422	135,493,980
2022 Share Repurchase Program
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Authorized repurchase of common stock under share repurchase programs							$ 1,000,000,000
Number of shares repurchased (in shares)				16,500,000
Value of shares repurchased				$ 1,000,000,000
Share repurchase program, remaining amount available				$ 0
2023 Share Repurchase Program
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Authorized repurchase of common stock under share repurchase programs						$ 1,000,000,000
Number of shares repurchased (in shares)	2,700,000
Value of shares repurchased	$ 224,000,000
Share repurchase program, remaining amount available	$ 776,000,000
2023 Share Repurchase Program | Subsequent Event
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Authorized repurchase of common stock under share repurchase programs					$ 2,500,000,000
Common Stock
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Common stock outstanding, beginning balances (in shares)	135,493,980	144,496,077	150,330,358
Shares issued upon exercise of stock options (in shares)	0	0	9,321
Shares issued under employee stock purchase plan (in shares)	1,043,294	970,480	1,288,397
Vesting of restricted stock (in shares)	2,014,802	2,503,143	2,290,104
Purchases of treasury stock under employee stock plans (in shares)	(571,606)	(713,667)	(622,703)
Treasury shares purchased (in shares)	(6,686,048)	(11,762,053)	(8,799,400)
Common stock outstanding, ending balance (in shares)	131,294,422	135,493,980	144,496,077