Revenue Recognition - Narrative (Details) $ in Millions	3 Months Ended
	Apr. 30, 2025 USD ($) category	Apr. 30, 2024 USD ($)
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Number of revenue categories | category	3
Contract with customer, liability, revenue recognized	$ 1,350	$ 1,190
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2026-05-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining performance obligation	$ 2,610
Performance obligation, expected timing of satisfaction
Remaining performance obligation percentage	36.00%
Period One | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2025-05-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining performance obligation	$ 7,160
Performance obligation, expected timing of satisfaction	3 years
Period Two | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2025-05-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining performance obligation	$ 4,550
Performance obligation, expected timing of satisfaction	12 months
Remaining performance obligation percentage	64.00%