Equity Compensation - Narrative (Details) $ in Millions		3 Months Ended			6 Months Ended
	May 11, 2021 USD ($) tradingDay	Jul. 31, 2023 USD ($) shares	Apr. 30, 2023 USD ($)	Jul. 31, 2022 USD ($) shares	Jul. 31, 2023 USD ($) period shares	Jul. 31, 2022 USD ($)	Jan. 31, 2022 USD ($)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Fair value of common stock issued to settle liability-classified restricted common stock		$ 8	$ 1	$ 5	$ 9	$ 5
Market capitalization					2,000
Share-based compensation expense		$ 197		169	$ 362	324
Expected dividends					0.00%
1998 Employee Qualified Stock Purchase Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage of compensation that eligible employees can use to purchase common stock, maximum					15.00%
Percentage of fair market value eligible employees can purchase common stock, minimum					85.00%
Number of exercise period | period					4
Term of exercise period					6 months
Term of offering period					24 months
Upchain
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares authorized related to acquisition	$ 13
Threshold consecutive trading days | tradingDay	90
Shares issued in period (in shares) | shares					39,000
Value of shares issued					$ 8
Other Fiscal 2022 Acquisitions
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares authorized related to acquisition							$ 11
Remaining shares estimated to be issued (in shares) | shares		33,000			33,000
Fiscal 2023 Acquisitions
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares authorized related to acquisition		$ 5			$ 5
Series of Individually Immaterial Business Acquisitions
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Remaining shares estimated to be issued (in shares) | shares		14,000			14,000
Value of shares issued					$ 1
Restricted Stock Units (RSUs) and Performance Shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Awards vested in period, fair value					$ 373	269
Awards granted in period (in shares) | shares					3,394,000
Restricted Stock Units (RSUs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Awards granted in period (in shares) | shares					3,083,000
Share based compensation expense		$ 164		$ 136	$ 294	253
Performance Stock Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Awards granted in period (in shares) | shares		0		0	311,000
Share based compensation expense		$ 10		$ 14	$ 21	$ 29
Market capitalization					$ 2,000
Award vesting period					3 years
Expected dividends					0.00%	0.00%
Performance Stock Units | Share-based Compensation Award, Tranche One
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Awards vesting percentage (in percentage)					33.33%
Performance Stock Units | Share-based Compensation Award, Tranche Two
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Awards vesting percentage (in percentage)					33.33%
Performance Stock Units | Share-based Compensation Award, Tranche Three
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Awards vesting percentage (in percentage)					33.33%
Restricted Stock | Fiscal 2023 Acquisitions
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period					2 years
Shares issued in period (in shares) | shares					40,000
Common stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation expense		$ 4		$ 7	$ 10	$ 17
Common stock | Series of Individually Immaterial Business Acquisitions
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares issued in period (in shares) | shares					9,000