Accumulated Other Comprehensive Loss (Details) - USD ($) $ in Millions	12 Months Ended
	Jan. 31, 2023	Jan. 31, 2022	Jan. 31, 2021
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	$ 849	$ 965	$ (139)
Other comprehensive income (loss) before reclassifications	(16)	(11)
Pre-tax gain (loss) reclassified from accumulated other comprehensive income	(39)	22
Tax effects	(6)	(9)
Total other comprehensive (loss) income	(61)	2	34
Ending balance	1,145	849	965
Accumulated Other Comprehensive Loss
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	(124)	(126)	(160)
Total other comprehensive (loss) income	(61)	2	34
Ending balance	(185)	(124)	(126)
Net Unrealized Gains (Losses) on Derivative Instruments
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	24	(24)
Other comprehensive income (loss) before reclassifications	83	39
Pre-tax gain (loss) reclassified from accumulated other comprehensive income	(36)	17
Tax effects	(7)	(8)
Total other comprehensive (loss) income	40	48
Ending balance	64	24	(24)
Net Unrealized Gains (Losses) on Available for Sale Securities
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	18	6
Other comprehensive income (loss) before reclassifications	0	12
Pre-tax gain (loss) reclassified from accumulated other comprehensive income	0	0
Tax effects	0	0
Total other comprehensive (loss) income	0	12
Ending balance	18	18	6
Defined Benefit Pension Components
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	(16)	(21)
Other comprehensive income (loss) before reclassifications	(1)	1
Pre-tax gain (loss) reclassified from accumulated other comprehensive income	(3)	5
Tax effects	1	(1)
Total other comprehensive (loss) income	(3)	5
Ending balance	(19)	(16)	(21)
Foreign Currency Translation Adjustments
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	(150)	(87)
Other comprehensive income (loss) before reclassifications	(98)	(63)
Pre-tax gain (loss) reclassified from accumulated other comprehensive income	0	0
Tax effects	0	0
Total other comprehensive (loss) income	(98)	(63)
Ending balance	$ (248)	$ (150)	$ (87)