Stockholders' Equity Accumulated Other Comprehensive Income (Details) - USD ($) $ in Millions	3 Months Ended						9 Months Ended
	Jan. 31, 2023	Oct. 31, 2022	Jul. 31, 2022	Jan. 31, 2022	Oct. 31, 2021	Jul. 31, 2021	Jan. 31, 2023	Jan. 31, 2022
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance			$ (352)				$ (352)
Net other comprehensive income (loss)	$ 91	$ 2	1	$ (6)	$ 2	$ 8	94	$ 4
Ending balance	(258)						(258)
Accumulated Foreign Currency Adjustment Attributable to Parent [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance			(239)				(239)
Net other comprehensive income (loss)	119			(27)			108	(49)
Ending balance	(131)						(131)
Accumulated Net Gain (Loss) from Cash Flow Hedges Attributable to Parent [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance			37				37
Net other comprehensive income (loss)	(34)			16			(24)	40
Ending balance	13						13
Accumulated Defined Benefit Plans Adjustment Attributable to Parent [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance			(150)				(150)
Net other comprehensive income (loss)	6			5			10	$ 13
Ending balance	(140)						$ (140)
AOCI Attributable to Parent [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Net other comprehensive income (loss)	$ 91	$ 2	$ 1	$ (6)	$ 2	$ 8