Short-term Borrowings and Long-term Debt - Schedule of Significant Debt Repayments (Details) € in Millions, ¥ in Millions, $ in Millions	12 Months Ended
	Jan. 31, 2025 USD ($)	Jan. 31, 2024 USD ($)	Jan. 31, 2025 JPY (¥)	Jan. 31, 2024 JPY (¥)	Jan. 31, 2024 EUR (€)
Debt Instrument [Line Items]
Significant repayments of long-term debt	$ 3,373	$ 4,030
3.30% Debt, Due April 2024 | Unsecured fixed-rate debt
Debt Instrument [Line Items]
Principal Amount	$ 1,500
Interest Rate	3.30%		3.30%
Significant repayments of long-term debt	$ 1,500
2.85% Debt, Due July 2024 | Unsecured fixed-rate debt
Debt Instrument [Line Items]
Principal Amount	$ 990
Interest Rate	2.85%		2.85%
Significant repayments of long-term debt	$ 990
0.298% Debt, Due July 2024 | Unsecured fixed-rate debt
Debt Instrument [Line Items]
Principal Amount | ¥			¥ 40,000
Interest Rate	0.298%		0.298%
Significant repayments of long-term debt	$ 253
2.650% Debt, Due December 2024 | Unsecured fixed-rate debt
Debt Instrument [Line Items]
Principal Amount	$ 630
Interest Rate	2.65%		2.65%
Significant repayments of long-term debt	$ 630
2.550% Debt, Due 2023 | Unsecured fixed-rate debt
Debt Instrument [Line Items]
Principal Amount | €					€ 1,750
Interest Rate				2.55%	2.55%
Significant repayments of long-term debt		1,750
3.400% Debt, Due 2023 | Unsecured fixed-rate debt
Debt Instrument [Line Items]
Principal Amount | ¥				¥ 2,280
Interest Rate				3.40%	3.40%
Significant repayments of long-term debt		$ 2,280