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Acquisitions - Narrative (Details)	3 Months Ended		9 Months Ended		12 Months Ended
Acquisitions - Narrative (Details)	Oct. 31, 2022 USD ($) acquisition	Oct. 31, 2021 USD ($)	Oct. 31, 2022 USD ($) businessCombination tradingDay shares	Oct. 31, 2021 USD ($)	Jan. 31, 2022 tradingDay
Business Acquisition [Line Items]
Number of businesses combinations \| acquisition	0
Fair value of common stock issued related to business combinations			$ 10,000,000	$ 3,000,000
Share-based compensation expense	$ 172,000,000	$ 144,000,000	$ 496,000,000	$ 413,000,000
Consecutive trading days \| tradingDay			90		90
Fiscal 2023 Acquisitions
Business Acquisition [Line Items]
Number of businesses combinations \| businessCombination			2
Consideration transferred			$ 114,000,000
Payments to acquire businesses			96,000,000
Fair value of common stock issued related to business combinations			10,000,000
Business combination, consideration transferred, other			97,000,000
Share based compensation expense, liability-classified awards			5,000,000
Share-based compensation expense			2,000,000
Goodwill deductible for tax purposes	0		$ 0
Fiscal 2023 Acquisitions \| Share-based Compensation Award, Tranche One
Business Acquisition [Line Items]
Awards vesting percentage (in percentage)			40.00%
Fiscal 2023 Acquisitions \| Share-based Compensation Award, Tranche Two
Business Acquisition [Line Items]
Awards vesting percentage (in percentage)			60.00%
Fiscal 2023 Acquisitions \| Prepaid expenses and other current assets
Business Acquisition [Line Items]
Business combination, contingent consideration, liability	$ 10,000,000		$ 10,000,000
Fiscal 2023 Acquisitions \| Certain Employees of Acquiree
Business Acquisition [Line Items]
Fair value of common stock issued related to business combinations			$ 5,000,000
Fiscal 2023 Acquisitions \| Restricted Stock
Business Acquisition [Line Items]
Shares issued in period (in shares) \| shares			40,289