Debt - Carrying Value of Borrowings (Details) - USD ($) $ in Millions	Apr. 30, 2024	Jan. 31, 2024
Debt Instrument [Line Items]
Outstanding Principal as of April 30, 2024	$ 9,500
Total carrying value of debt	9,429	$ 9,426
Less current portion of debt	(1,000)	(999)
Total noncurrent debt	$ 8,429	8,427
Senior Notes \| 2024 Senior Notes
Debt Instrument [Line Items]
Contractual Interest Rate	0.625%
Outstanding Principal as of April 30, 2024	$ 1,000
Total carrying value of debt	$ 1,000	999
Senior Notes \| 2028 Senior Notes
Debt Instrument [Line Items]
Contractual Interest Rate	3.70%
Outstanding Principal as of April 30, 2024	$ 1,500
Total carrying value of debt	$ 1,495	1,495
Senior Notes \| 2028 Senior Sustainability Notes
Debt Instrument [Line Items]
Contractual Interest Rate	1.50%
Outstanding Principal as of April 30, 2024	$ 1,000
Total carrying value of debt	$ 994	994
Senior Notes \| 2031 Senior Notes
Debt Instrument [Line Items]
Contractual Interest Rate	1.95%
Outstanding Principal as of April 30, 2024	$ 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 April 30, 2024	$ 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 April 30, 2024	$ 2,000
Total carrying value of debt	$ 1,978	1,978
Senior Notes \| 2061 Senior Notes
Debt Instrument [Line Items]
Contractual Interest Rate	3.05%
Outstanding Principal as of April 30, 2024	$ 1,250
Total carrying value of debt	$ 1,235	$ 1,235

Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt.

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Amount, after deduction of unamortized premium (discount) and debt issuance cost, of long-term debt. Excludes lease obligation.

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Amount, after deduction of unamortized premium (discount) and debt issuance cost, of long-term debt classified as noncurrent. Excludes lease obligation.

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