Accumulated Other Comprehensive Loss (Details) - USD ($) $ in Millions	12 Months Ended
	Jan. 31, 2025	Jan. 31, 2024	Jan. 31, 2023
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	$ 1,855	$ 1,145	$ 849
Other comprehensive income (loss) before reclassifications	(38)	(8)
Pre-tax (gain) loss reclassified from accumulated other comprehensive income	(14)	(52)
Tax effects	1	11
Total other comprehensive loss	(51)	(49)	(61)
Ending balance	2,621	1,855	1,145
Accumulated Other Comprehensive Loss
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	(234)	(185)	(124)
Total other comprehensive loss	(51)	(49)	(61)
Ending balance	(285)	(234)	(185)
Net Unrealized Gains (Losses) on Derivative Instruments
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	23	64
Other comprehensive income (loss) before reclassifications	13	10
Pre-tax (gain) loss reclassified from accumulated other comprehensive income	(14)	(57)
Tax effects	2	6
Total other comprehensive loss	1	(41)
Ending balance	24	23	64
Net Unrealized Gains (Losses) on Available for Sale Securities
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	20	18
Other comprehensive income (loss) before reclassifications	1	1
Pre-tax (gain) loss reclassified from accumulated other comprehensive income	(1)	1
Tax effects	0	0
Total other comprehensive loss	0	2
Ending balance	20	20	18
Defined Benefit Pension Components
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	(24)	(19)
Other comprehensive income (loss) before reclassifications	(2)	(10)
Pre-tax (gain) loss reclassified from accumulated other comprehensive income	1	4
Tax effects	0	1
Total other comprehensive loss	(1)	(5)
Ending balance	(25)	(24)	(19)
Foreign Currency Translation Adjustments
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	(253)	(248)
Other comprehensive income (loss) before reclassifications	(50)	(9)
Pre-tax (gain) loss reclassified from accumulated other comprehensive income	0	0
Tax effects	(1)	4
Total other comprehensive loss	(51)	(5)
Ending balance	$ (304)	$ (253)	$ (248)