Revenue Recognition - Narrative (Details) $ in Millions	3 Months Ended		6 Months Ended
	Jul. 31, 2025 USD ($)	Jul. 31, 2024 USD ($)	Jul. 31, 2025 USD ($) category	Jul. 31, 2024 USD ($)
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Number of revenue categories | category			3
Contract with customer, liability, revenue recognized	$ 1,140	$ 1,020	$ 2,480	$ 2,210
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2026-08-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining performance obligation	$ 2,620		$ 2,620
Performance obligation, expected timing of satisfaction
Remaining performance obligation percentage	36.00%		36.00%
Period One | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2025-08-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining performance obligation	$ 7,300		$ 7,300
Performance obligation, expected timing of satisfaction	3 years		3 years
Period Two | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2025-08-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining performance obligation	$ 4,680		$ 4,680
Performance obligation, expected timing of satisfaction	12 months		12 months
Remaining performance obligation percentage	64.00%		64.00%