Stockholders' Equity, Comprehensive Income and Share-Based Compensation - Narrative (Details) - USD ($) $ / shares in Units, shares in Millions		1 Months Ended		3 Months Ended		9 Months Ended
	Jun. 01, 2023	Mar. 31, 2023	Dec. 31, 2022	Jul. 30, 2023	Jul. 31, 2022	Jul. 30, 2023	Jul. 31, 2022	Mar. 31, 2022
Equity [Line Items]
Amount authorized by board of directors to repurchase shares		$ 10,000,000,000						$ 6,000,000,000
Remaining authorized repurchase amount				$ 13,400,000,000		$ 13,400,000,000
Common stock repurchases				$ 439,000,000		$ 1,489,000,000
Average price paid per share (in dollars per share)				$ 129.86		$ 116.70
Common stock repurchases				$ 443,000,000	$ 1,000,000,000	$ 1,497,000,000	$ 4,603,000,000
Average price paid per share (in dollars per share)				$ 131.09	$ 102.09	$ 117.35	$ 125.85
Dividends declared per share (in dollars per share)	$ 0.32	$ 0.32	$ 0.26	$ 0.32	$ 0.26	$ 0.90	$ 0.76
Payments of dividends						$ 707,000,000	$ 650,000,000
Shares issued (in shares)						1.0	1.0
Employee Stock
Equity [Line Items]
Performance of total shareholder return						100.00%
Total unrecognized compensation expense				$ 854,000,000		$ 854,000,000
Weighted average period for unrecognized compensation expense to be recognized (in years)						2 years 8 months 12 days
Performance Shares
Equity [Line Items]
Additional performance-based awards to be earned upon certain levels of achievement (in shares)				0.8		0.8
Award measurement metric relative weight						50.00%
Award measurement period						3 years
Performance Shares | Minimum
Equity [Line Items]
Award vesting rights, percentage of target amount						0.00%
Performance Shares | Maximum
Equity [Line Items]
Award vesting rights, percentage of target amount						200.00%
Employee Stock Incentive Plan
Equity [Line Items]
Number of shares available for grant (in shares)				25.0		25.0
Employee Stock Purchase Plan
Equity [Line Items]
Number of shares available for grant (in shares)				13.0		13.0
Employee stock purchase plan purchase period						6 months
Employee Stock Purchase Plan | Employee Stock
Equity [Line Items]
Purchase price of common stock						85.00%