Revenue Recognition - Narrative (Details) $ in Millions	3 Months Ended		9 Months Ended
	Oct. 31, 2025 USD ($)	Oct. 31, 2024 USD ($)	Oct. 31, 2025 USD ($) category	Oct. 31, 2024 USD ($)
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Number of revenue categories | category			3
Contract with customer, liability, revenue recognized	$ 843	$ 790	$ 3,330	$ 3,000
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2026-11-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining performance obligation	$ 2,530		$ 2,530
Performance obligation, expected timing of satisfaction
Remaining performance obligation percentage	34.00%		34.00%
Period One | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2025-11-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining performance obligation	$ 7,360		$ 7,360
Performance obligation, expected timing of satisfaction	3 years		3 years
Period Two | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2025-11-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining performance obligation	$ 4,830		$ 4,830
Performance obligation, expected timing of satisfaction	12 months		12 months
Remaining performance obligation percentage	66.00%		66.00%