Summary of Significant Accounting Policies (Narrative) (Details) - USD ($) $ in Billions	Jul. 31, 2023	Jan. 31, 2023	Jul. 31, 2022
Accounting Policies [Line Items]
Outstanding payment obligation	$ 5.3	$ 5.2	$ 6.4
Minimum
Accounting Policies [Line Items]
Supplier finance program, payment timing, period (in days)	30 days
Maximum
Accounting Policies [Line Items]
Supplier finance program, payment timing, period (in days)	90 days