Supplementary Financial Information - Value of Remaining Performance Obligations (Narrative) (Details) $ in Billions	Jan. 31, 2024 USD ($)
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Remaining performance obligations	$ 3.8
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining performance obligations	3.8
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2024-02-01
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Remaining performance obligations	$ 1.7
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining performance obligations period	12 months
Remaining performance obligations	$ 1.7
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2025-02-01
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Remaining performance obligations	$ 2.1
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining performance obligations period
Remaining performance obligations	$ 2.1