For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

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Amount, after allowance for credit loss, of right to consideration in exchange for good or service transferred to customer when right is conditioned on something other than passage of time.

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Period in which remaining performance obligation is expected to be recognized as revenue, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

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Revenues - Narrative (Details) - USD ($) $ in Millions	3 Months Ended
Revenues - Narrative (Details) - USD ($) $ in Millions	Apr. 30, 2026	Apr. 30, 2025	Jan. 31, 2026
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Acquired customer contract asset	$ 905		$ 818
Minimum \| Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2026-05-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Noncurrent remaining performance obligation, recognition period	13 months
Maximum \| Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2026-05-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Noncurrent remaining performance obligation, recognition period	36 months
United States \| Revenue \| Geographic concentration risk
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Concentration risk percentage	92.00%	93.00%