Stockholders' Equity, Comprehensive Income and Share-Based Compensation - Additional Information (Details) - USD ($) $ / shares in Units, shares in Millions	1 Months Ended			3 Months Ended			9 Months Ended
	Jun. 30, 2022	Mar. 31, 2022	Dec. 31, 2021	Jul. 31, 2022	Jan. 30, 2022	Aug. 01, 2021	Jul. 31, 2022	Aug. 01, 2021	Mar. 31, 2021
Equity [Line Items]
Amount authorized by board of directors to repurchase shares		$ 6,000,000,000							$ 7,500,000,000
Remaining authorized repurchase amount				$ 6,400,000,000			$ 6,400,000,000
Dividends declared per share (in dollars per share)	$ 0.26	$ 0.26	$ 0.24	$ 0.26		$ 0.24	$ 0.76	$ 0.70
Payments of dividends							$ 650,000,000	$ 622,000,000
Employee Stock
Equity [Line Items]
Performance of total shareholder return					100.00%		100.00%
Total unrecognized compensation expense				$ 711,000,000			$ 711,000,000
Weighted average period for unrecognized compensation expense to be recognized (in years)							2 years 9 months 18 days
Performance Shares
Equity [Line Items]
Additional performance-based awards to be earned upon certain levels of achievement (in shares)				0.9			0.9
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)				32.0			32.0
Employee Stock Purchase Plan
Equity [Line Items]
Number of shares available for grant (in shares)				15.0			15.0
Employee stock purchase plan purchase period							6 months
Shares issued under employee stock purchase plans (in shares)							1.0	2.0
Employee Stock Purchase Plan | Employee Stock
Equity [Line Items]
Purchase price of common stock							85.00%