Other Comprehensive Income (Details) - USD ($) $ in Millions		3 Months Ended						9 Months Ended
		Jan. 31, 2025	Oct. 31, 2024	Jul. 31, 2024	Jan. 31, 2024	Oct. 31, 2023	Jul. 31, 2023	Jan. 31, 2025	Jan. 31, 2024
Before Tax:
Net other comprehensive income (loss)		$ (45)			$ 52			$ (119)	$ 4
Tax Effect:
Net other comprehensive income (loss)		(7)			14			(3)	7
Net of Tax:
Net other comprehensive income (loss)		(52)	$ (27)	$ (43)	66	$ (91)	$ 36	(122)	11
Accumulated Foreign Currency Adjustment Attributable to Parent [Member]
Before Tax:
Net gain (loss)		(55)			61			(126)	0
Reclassification to earnings		0			4			0	4
Net other comprehensive income (loss)		(55)			65			(126)	4
Tax Effect:
Net gain (loss)		(5)			4			(2)	0
Reclassification to earnings		0			6			0	6
Net other comprehensive income (loss)		(5)			10			(2)	6
Net of Tax:
Net gain (loss)		(60)			65			(128)	0
Reclassification to earnings		0			10			0	10
Net other comprehensive income (loss)		(60)			75			(128)	10
Accumulated Net Gain (Loss) from Cash Flow Hedges Attributable to Parent [Member]
Before Tax:
Net gain (loss)		12			(11)			11	6
Reclassification to earnings	[1]	(4)			(3)			(7)	(11)
Net other comprehensive income (loss)		8			(14)			4	(5)
Tax Effect:
Net gain (loss)		(3)			3			(3)	(1)
Reclassification to earnings	[1]	1			1			2	3
Net other comprehensive income (loss)		(2)			4			(1)	2
Net of Tax:
Net gain (loss)		9			(8)			8	5
Reclassification to earnings	[1]	(3)			(2)			(5)	(8)
Net other comprehensive income (loss)		6			(10)			3	(3)
Accumulated Defined Benefit Plans Adjustment Attributable to Parent [Member]
Before Tax:
Net gain (loss)		1			0			1	0
Reclassification to earnings	[2]	1			1			2	5
Net other comprehensive income (loss)		2			1			3	5
Tax Effect:
Net gain (loss)		0			0			0	0
Reclassification to earnings	[2]	0			0			0	(1)
Net other comprehensive income (loss)		0			0			0	(1)
Net of Tax:
Net gain (loss)		1			0			1	0
Reclassification to earnings	[2]	1			1			2	4
Net other comprehensive income (loss)		$ 2			$ 1			$ 3	$ 4

[1] Pre-tax amount for each period is classified as sales in the accompanying condensed consolidated statements of operations.

[2] Pre-tax amount for each period is classified as non-operating postretirement expense in the accompanying condensed consolidated statements of operations.