Accumulated Other Comprehensive Loss (Details) - USD ($) $ in Millions	3 Months Ended						9 Months Ended
	Oct. 31, 2025	Jul. 31, 2025	Apr. 30, 2025	Oct. 31, 2024	Jul. 31, 2024	Apr. 30, 2024	Oct. 31, 2025	Oct. 31, 2024
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	$ 2,715	$ 2,617	$ 2,621	$ 2,474	$ 2,161	$ 1,855	$ 2,621	$ 1,855
Other comprehensive (loss) income before reclassifications							50	(14)
Pre-tax loss reclassified from accumulated other comprehensive loss							(24)	(14)
Tax effects							(4)	2
Total other comprehensive income (loss)	(9)	(6)	37	(11)	14	(29)	22	(26)
Ending balance	2,893	2,715	2,617	2,616	2,474	2,161	2,893	2,616
Accumulated other comprehensive loss
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	(254)	(248)	(285)	(249)	(263)	(234)	(285)	(234)
Total other comprehensive income (loss)	(9)	(6)	37	(11)	14	(29)
Ending balance	(263)	$ (254)	(248)	(260)	$ (249)	(263)	(263)	(260)
Net Unrealized Gains (Losses) on Derivative Instruments
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance			24			23	24	23
Other comprehensive (loss) income before reclassifications							(22)	(5)
Pre-tax loss reclassified from accumulated other comprehensive loss							(22)	(13)
Tax effects							5	3
Total other comprehensive income (loss)							(39)	(15)
Ending balance	(15)			8			(15)	8
Net Unrealized Gains (Losses) on Available-for-Sale Debt Securities
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance			20			20	20	20
Other comprehensive (loss) income before reclassifications							4	0
Pre-tax loss reclassified from accumulated other comprehensive loss							(1)	(1)
Tax effects							0	0
Total other comprehensive income (loss)							3	(1)
Ending balance	23			19			23	19
Defined Benefit Pension Components
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance			(25)			(24)	(25)	(24)
Other comprehensive (loss) income before reclassifications							2	0
Pre-tax loss reclassified from accumulated other comprehensive loss							(1)	0
Tax effects							0	0
Total other comprehensive income (loss)							1	0
Ending balance	(24)			(24)			(24)	(24)
Foreign Currency Translation Adjustments
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance			$ (304)			$ (253)	(304)	(253)
Other comprehensive (loss) income before reclassifications							66	(9)
Pre-tax loss reclassified from accumulated other comprehensive loss							0	0
Tax effects							(9)	(1)
Total other comprehensive income (loss)							57	(10)
Ending balance	$ (247)			$ (263)			$ (247)	$ (263)