Stockholders' Equity (Deficit) - Schedule of Share Repurchases (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	1 Months Ended		3 Months Ended	12 Months Ended
	May 31, 2022	Feb. 28, 2022	Mar. 31, 2022	Mar. 31, 2024	Mar. 31, 2023	Mar. 31, 2022
Approximate Dollar Value of Shares that May Yet Be Purchased Under the Programs
Beginning balance				$ 3,613	$ 3,278	$ 2,785
Share repurchase authorization increase			$ 4,000	6,000	4,000	4,000
Ending balance			$ 3,278	6,615	3,613	$ 3,278
Excise taxes				$ 25	$ 0
Accelerated Share Repurchase, May 2021
Accelerated Share Repurchases [Line Items]
Total Number of Shares Purchased (in shares)						5.2
Average Price Paid Per Share (in dollars per share)						$ 193.22
Approximate Dollar Value of Shares that May Yet Be Purchased Under the Programs
Shares repurchased						$ (1,000)
Accelerated Share Repurchase, February 2022
Accelerated Share Repurchases [Line Items]
Total Number of Shares Purchased (in shares)					0.3	4.8
Average Price Paid Per Share (in dollars per share)					$ 295.16	$ 265.56
Approximate Dollar Value of Shares that May Yet Be Purchased Under the Programs
Shares repurchased		$ (1,500)			$ 0	$ (1,500)
Open Market Transactions
Accelerated Share Repurchases [Line Items]
Total Number of Shares Purchased (in shares)				6.9	4.7	4.6
Average Price Paid Per Share (in dollars per share)				$ 436.46	$ 363.24	$ 217.73
Approximate Dollar Value of Shares that May Yet Be Purchased Under the Programs
Shares repurchased				$ (2,998)	$ (1,693)	$ (1,007)
Open Market Transactions | Other Accrued Liabilities
Approximate Dollar Value of Shares that May Yet Be Purchased Under the Programs
Shares repurchased					$ (27)
Accelerated Share Repurchase, May 2022
Accelerated Share Repurchases [Line Items]
Total Number of Shares Purchased (in shares)					3.1
Average Price Paid Per Share (in dollars per share)					$ 321.05
Approximate Dollar Value of Shares that May Yet Be Purchased Under the Programs
Shares repurchased					$ (1,000)
Accelerated Share Repurchase, December 2022
Accelerated Share Repurchases [Line Items]
Total Number of Shares Purchased (in shares)					2.6
Average Price Paid Per Share (in dollars per share)					$ 369.20
Approximate Dollar Value of Shares that May Yet Be Purchased Under the Programs
Shares repurchased					$ (972)
Accelerated Share Repurchase
Accelerated Share Repurchases [Line Items]
Total Number of Shares Purchased (in shares)	0.3		4.8
Average Price Paid Per Share (in dollars per share)		$ 295.16
Approximate Dollar Value of Shares that May Yet Be Purchased Under the Programs
Repurchase of common stock (in shares)		5.1