Income Taxes - Narrative (Details) - USD ($) $ in Millions	12 Months Ended
	Jan. 31, 2026	Jan. 31, 2025	Jan. 31, 2024	Jan. 31, 2023
Income Taxes [Line Items]
Gross unrecognized tax benefits	$ 307	$ 312	$ 261	$ 238
Unrecognized tax benefits that would reduce valuation allowance if recognized	50
Amount of gross unrecognized tax benefits that would impact the effective tax rate	257
Unrecognized tax benefits decrease due to statute lapses	39	0	2
Unrecognized tax benefits, penalties and interest accrued	20	15	7
Income tax expense from penalties and interest	4	$ 9	$ 2
Next Twelve Months
Income Taxes [Line Items]
Unrecognized tax benefits decrease due to statute lapses	162
Domestic Country
Income Taxes [Line Items]
Operating loss carryforwards	1,330
State and Local Jurisdiction
Income Taxes [Line Items]
Operating loss carryforwards	812
Foreign Tax Jurisdiction
Income Taxes [Line Items]
Operating loss carryforwards	22
Tax credit carryforward	52
Norway | Foreign Tax Jurisdiction
Income Taxes [Line Items]
Operating loss carryforwards	13
NEW ZEALAND | Foreign Tax Jurisdiction
Income Taxes [Line Items]
Operating loss carryforwards	7
California | State and Local Jurisdiction | Research Tax Credit Carryforward
Income Taxes [Line Items]
Tax credit carryforward	143
MASSACHUSETTS | State and Local Jurisdiction | Research Tax Credit Carryforward
Income Taxes [Line Items]
Tax credit carryforward	18
Canada | Foreign Tax Jurisdiction | Research Tax Credit Carryforward
Income Taxes [Line Items]
Tax credit carryforward	$ 38