Stockholders' Equity - Accumulated Other Comprehensive Income (Details) - USD ($) $ in Millions	3 Months Ended						9 Months Ended
	Jan. 31, 2026	Oct. 31, 2025	Jul. 31, 2025	Jan. 31, 2025	Oct. 31, 2024	Jul. 31, 2024	Jan. 31, 2026	Jan. 31, 2025
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance	$ 4,134	$ 3,988	$ 3,993	$ 3,705	$ 3,465	$ 3,517	$ 3,993	$ 3,517
Net other comprehensive income (loss)	82	14	36	(52)	(27)	(43)	132	(122)
Ending balance	4,082	4,134	3,988	3,823	3,705	3,465	4,082	3,823
Accumulated Foreign Currency Adjustment Attributable to Parent [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance			(92)				(92)
Net other comprehensive income (loss)	86			(60)			120	(128)
Ending balance	28						28
Accumulated Gain (Loss), Net, Cash Flow Hedge, Parent [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance			(5)				(5)
Net other comprehensive income (loss)	(9)			6			(5)	3
Ending balance	(10)						(10)
Accumulated Defined Benefit Plans Adjustment Attributable to Parent [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance			(123)				(123)
Net other comprehensive income (loss)	5			2			17	3
Ending balance	(106)						(106)
AOCI Attributable to Parent [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance	(170)	(184)	(220)	(291)	(264)	(221)	(220)	(221)
Net other comprehensive income (loss)	82	14	36	(52)	(27)	(43)	132
Ending balance	$ (88)	$ (170)	$ (184)	$ (343)	$ (291)	$ (264)	$ (88)	$ (343)