Stockholders' Equity - Stock Repurchase Programs and Treasury Shares and Dividends on Common Stock (Details) - USD ($) $ / shares in Units, shares in Millions	1 Months Ended		3 Months Ended		6 Months Ended
	Feb. 22, 2024	Jan. 31, 2024	Jan. 31, 2024	Jan. 31, 2023	Jan. 31, 2024	Jan. 31, 2023	Aug. 22, 2023
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock repurchased (in shares)					2.1
Total stock repurchased, including amounts not included under repurchase plans		$ 12,000,000			$ 1,100,000,000
Stock repurchase program, remaining authorized repurchase amount		$ 2,700,000,000	$ 2,700,000,000		$ 2,700,000,000		$ 2,300,000,000
Common stock, dividends, per share, cash paid (in dollars per share)					$ 1.80
Quarterly cash dividends declared			$ (260,000,000)	$ (227,000,000)	$ (521,000,000)	$ (452,000,000)
Cash dividends declared per common share (in dollars per share)			$ 0.90	$ 0.78	$ 1.80	$ 1.56
Subsequent Event
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Cash dividends declared per common share (in dollars per share)	$ 0.90