Segments and Disaggregated Revenue - Segment Revenues and Long-Lived Assets (Details) - USD ($) $ in Millions	12 Months Ended
	Jan. 31, 2025	Jan. 31, 2024	Jan. 31, 2023
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	$ 680,985	$ 648,125	$ 611,289
Long-lived assets	139,705	130,338	119,234
U.S.
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	557,622	532,076	508,685
Long-lived assets	115,250	104,480	95,567
Non-U.S. operations
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	123,363	116,049	102,604
Long-lived assets	$ 24,455	$ 25,858	$ 23,667