Retirement Benefit Plans - Narrative (Details) - USD ($) $ in Millions	12 Months Ended
	Jan. 31, 2025	Jan. 31, 2024	Jan. 31, 2023
Defined Contribution Plan Disclosure [Line Items]
Projected benefit obligation of plan assets	$ 78	$ 81
Accumulated benefit obligation	70	73
Fair value of plan assets	74	77
Other long-term liabilities	9	6
Net periodic (benefit) cost	3	$ 2	$ 3
Estimated future employer contributions in next fiscal year	$ 4
Mandatory Retirement Savings, Cash Balance Plan
Defined Contribution Plan Disclosure [Line Items]
Weighted-average interest crediting rate	1.00%	1.00%	1.00%
Supplementary Retirement Savings, Cash Balance Plan
Defined Contribution Plan Disclosure [Line Items]
Weighted-average interest crediting rate	0.50%	0.30%	0.30%
United States
Defined Contribution Plan Disclosure [Line Items]
Maximum annual contributions per employee	75.00%
Cost recognized	$ 27	$ 26	$ 26
Foreign Plan
Defined Contribution Plan Disclosure [Line Items]
Contributions paid by employer	$ 47	$ 43	$ 39