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Business and Summary of Significant Accounting Policies - Changes In the Carrying Amount of Goodwill (Details) - USD ($) | 12 Months Ended
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Jan. 31, 2024 | Jan. 31, 2023 | Jan. 31, 2022
Accounting Policies [Abstract] |  |  |
Impairment of goodwill | $ 0 | $ 0 | $ 0
Goodwill [Roll Forward] |  |  |
Goodwill, beginning of period, gross |  | 3,774,000,000 | 3,753,000,000
Less: accumulated impairment losses, beginning of the year |  | (149,000,000) | (149,000,000)
Goodwill, beginning of the year | 3,625,000,000 | 3,604,000,000 |
Additions arising from acquisitions during the year | 25,000,000 | 85,000,000 |
Effect of foreign currency translation and measurement period adjustments | 3,000,000 | (64,000,000) |
Goodwill, end of the year | $ 3,653,000,000 | $ 3,625,000,000 | $ 3,604,000,000

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