Stockholders' Equity - Stock Repurchase Programs and Treasury Shares and Dividends on Common Stock (Details) - USD ($) $ / shares in Units, shares in Millions	1 Months Ended	2 Months Ended	3 Months Ended		9 Months Ended
	May 31, 2023	May 31, 2023	Apr. 30, 2023	Apr. 30, 2022	Apr. 30, 2023	Apr. 30, 2022	Aug. 19, 2022
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock repurchased (in shares)					3.7
Total stock repurchased, including amounts not included under repurchase plans					$ 1,500,000,000
Stock repurchase program, remaining authorized repurchase amount			$ 2,000,000,000		$ 2,000,000,000		$ 2,000,000,000
Common stock, dividends, per share, cash paid (in dollars per share)					$ 2.34
Dividends declared			$ 224,000,000	$ 197,000,000	$ 676,000,000	$ 586,000,000
Cash dividends declared per common share (in dollars per share)			$ 0.78	$ 0.68	$ 2.34	$ 2.04
Subsequent Event
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total stock repurchased, including amounts not included under repurchase plans		$ 17,000,000
Cash dividends declared per common share (in dollars per share)	$ 0.78