Accumulated Other Comprehensive Loss (Details) - USD ($) $ in Millions	12 Months Ended
	Jan. 31, 2026	Jan. 31, 2025	Jan. 31, 2024
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	$ 2,621	$ 1,855	$ 1,145
Other comprehensive income (loss) before reclassifications	70	(38)
Pre-tax (gain) loss reclassified from accumulated other comprehensive income	(21)	(14)
Tax effects	4	1
Total other comprehensive gain (loss)	53	(51)	(49)
Ending balance	3,045	2,621	1,855
Accumulated Other Comprehensive Loss
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	(285)	(234)	(185)
Total other comprehensive gain (loss)	53	(51)	(49)
Ending balance	(232)	(285)	(234)
Net Unrealized Gains (Losses) on Derivative Instruments
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	24	23
Other comprehensive income (loss) before reclassifications	(26)	13
Pre-tax (gain) loss reclassified from accumulated other comprehensive income	(20)	(14)
Tax effects	5	2
Total other comprehensive gain (loss)	(41)	1
Ending balance	(17)	24	23
Net Unrealized Gains (Losses) on Available for Sale Securities
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	20	20
Other comprehensive income (loss) before reclassifications	3	1
Pre-tax (gain) loss reclassified from accumulated other comprehensive income	(1)	(1)
Tax effects	0	0
Total other comprehensive gain (loss)	2	0
Ending balance	22	20	20
Defined Benefit Pension Components
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	(25)	(24)
Other comprehensive income (loss) before reclassifications	(2)	(2)
Pre-tax (gain) loss reclassified from accumulated other comprehensive income	0	1
Tax effects	0	0
Total other comprehensive gain (loss)	(2)	(1)
Ending balance	(27)	(25)	(24)
Foreign Currency Translation Adjustments
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	(304)	(253)
Other comprehensive income (loss) before reclassifications	95	(50)
Pre-tax (gain) loss reclassified from accumulated other comprehensive income	0	0
Tax effects	(1)	(1)
Total other comprehensive gain (loss)	94	(51)
Ending balance	$ (210)	$ (304)	$ (253)