Accumulated Other Comprehensive Loss (Details) - USD ($) $ in Millions	12 Months Ended
	Jan. 31, 2024	Jan. 31, 2023	Jan. 31, 2022
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	$ 1,145	$ 849	$ 965
Other comprehensive income (loss) before reclassifications	(8)	(16)
Pre-tax gain (loss) reclassified from accumulated other comprehensive income	(52)	(39)
Tax effects	11	(6)
Total other comprehensive (loss) income	(49)	(61)	2
Ending balance	1,855	1,145	849
Accumulated Other Comprehensive Loss
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	(185)	(124)	(126)
Total other comprehensive (loss) income	(49)	(61)	2
Ending balance	(234)	(185)	(124)
Net Unrealized Gains (Losses) on Derivative Instruments
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	64	24
Other comprehensive income (loss) before reclassifications	10	83
Pre-tax gain (loss) reclassified from accumulated other comprehensive income	(57)	(36)
Tax effects	6	(7)
Total other comprehensive (loss) income	(41)	40
Ending balance	23	64	24
Net Unrealized Gains (Losses) on Available for Sale Securities
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	18	18
Other comprehensive income (loss) before reclassifications	1	0
Pre-tax gain (loss) reclassified from accumulated other comprehensive income	1	0
Tax effects	0	0
Total other comprehensive (loss) income	2	0
Ending balance	20	18	18
Defined Benefit Pension Components
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	(19)	(16)
Other comprehensive income (loss) before reclassifications	(10)	(1)
Pre-tax gain (loss) reclassified from accumulated other comprehensive income	4	(3)
Tax effects	1	1
Total other comprehensive (loss) income	(5)	(3)
Ending balance	(24)	(19)	(16)
Foreign Currency Translation Adjustments
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	(248)	(150)
Other comprehensive income (loss) before reclassifications	(9)	(98)
Pre-tax gain (loss) reclassified from accumulated other comprehensive income	0	0
Tax effects	4	0
Total other comprehensive (loss) income	(5)	(98)
Ending balance	$ (253)	$ (248)	$ (150)