Stock Repurchase Program (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	12 Months Ended
Jan. 31, 2025	Jan. 31, 2024	Jan. 31, 2023
Share Repurchase Program [Line Items]
Repurchase and retirement of common shares (in shares)	3	4	5
Average repurchase price per share (in dollars per share)	$ 278.86	$ 201.54	$ 198.51
November 2022
Share Repurchase Program [Line Items]
Amount remained available for repurchase	$ 3,880
November 2024
Share Repurchase Program [Line Items]
Amount remained available for repurchase	$ 5,000

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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Amount remaining authorized for purchase of share under share repurchase plan. Includes, but is not limited to, repurchase of stock and unit of ownership.

+ References

No definition available.

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- Definition

Number of shares that have been repurchased and retired during the period.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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Total cost of shares repurchased divided by the total number of shares repurchased.

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