Debt - Carrying Value of Borrowings (Details) - USD ($) $ in Millions	Jan. 31, 2025	Jan. 31, 2024
Debt Instrument [Line Items]
Outstanding Principal as of January 31, 2025	$ 8,500
Total carrying value of debt	8,433	$ 9,426
Less current portion of debt	0	(999)
Total noncurrent debt	$ 8,433	8,427
Senior Notes | 2024 Senior Notes
Debt Instrument [Line Items]
Contractual Interest Rate	0.625%
Outstanding Principal as of January 31, 2025	$ 0
Total carrying value of debt	$ 0	999
Senior Notes | 2028 Senior Notes
Debt Instrument [Line Items]
Contractual Interest Rate	3.70%
Outstanding Principal as of January 31, 2025	$ 1,500
Total carrying value of debt	$ 1,496	1,495
Senior Notes | 2028 Senior Sustainability Notes
Debt Instrument [Line Items]
Contractual Interest Rate	1.50%
Outstanding Principal as of January 31, 2025	$ 1,000
Total carrying value of debt	$ 995	994
Senior Notes | 2031 Senior Notes
Debt Instrument [Line Items]
Contractual Interest Rate	1.95%
Outstanding Principal as of January 31, 2025	$ 1,500
Total carrying value of debt	$ 1,491	1,490
Senior Notes | 2041 Senior Notes
Debt Instrument [Line Items]
Contractual Interest Rate	2.70%
Outstanding Principal as of January 31, 2025	$ 1,250
Total carrying value of debt	$ 1,236	1,235
Senior Notes | 2051 Senior Notes
Debt Instrument [Line Items]
Contractual Interest Rate	2.90%
Outstanding Principal as of January 31, 2025	$ 2,000
Total carrying value of debt	$ 1,979	1,978
Senior Notes | 2061 Senior Notes
Debt Instrument [Line Items]
Contractual Interest Rate	3.05%
Outstanding Principal as of January 31, 2025	$ 1,250
Total carrying value of debt	$ 1,236	$ 1,235