Other Comprehensive Income (Details) - USD ($) $ in Millions		3 Months Ended				6 Months Ended
		Oct. 31, 2024	Jul. 31, 2024	Oct. 31, 2023	Jul. 31, 2023	Oct. 31, 2024	Oct. 31, 2023
Before Tax:
Net other comprehensive income (loss)		$ (28)		$ (80)		$ (74)	$ (48)
Tax Effect:
Net other comprehensive income (loss)		1		(11)		4	(7)
Net of Tax:
Net other comprehensive income (loss)		(27)	$ (43)	(91)	$ 36	(70)	(55)
Accumulated Foreign Currency Adjustment Attributable to Parent [Member]
Before Tax:
Net gain (loss)		(27)		(98)		(71)	(61)
Reclassification to earnings		0		0		0	0
Net other comprehensive income (loss)		(27)		(98)		(71)	(61)
Tax Effect:
Net gain (loss)		1		(6)		3	(4)
Reclassification to earnings		0		0		0	0
Net other comprehensive income (loss)		1		(6)		3	(4)
Net of Tax:
Net gain (loss)		(26)		(104)		(68)	(65)
Reclassification to earnings		0		0		0	0
Net other comprehensive income (loss)		(26)		(104)		(68)	(65)
Accumulated Net Gain (Loss) from Cash Flow Hedges Attributable to Parent [Member]
Before Tax:
Net gain (loss)		(2)		21		(1)	17
Reclassification to earnings	[1]	1		(5)		(3)	(8)
Net other comprehensive income (loss)		(1)		16		(4)	9
Tax Effect:
Net gain (loss)		0		(5)		0	(4)
Reclassification to earnings	[1]	0		1		1	2
Net other comprehensive income (loss)		0		(4)		1	(2)
Net of Tax:
Net gain (loss)		(2)		16		(1)	13
Reclassification to earnings	[1]	1		(4)		(2)	(6)
Net other comprehensive income (loss)		(1)		12		(3)	7
Accumulated Defined Benefit Plans Adjustment Attributable to Parent [Member]
Before Tax:
Net gain (loss)		0		0		0	0
Reclassification to earnings	[2]	0		2		1	4
Net other comprehensive income (loss)		0		2		1	4
Tax Effect:
Net gain (loss)		0		0		0	0
Reclassification to earnings	[2]	0		(1)		0	(1)
Net other comprehensive income (loss)		0		(1)		0	(1)
Net of Tax:
Net gain (loss)		0		0		0	0
Reclassification to earnings	[2]	0		1		1	3
Net other comprehensive income (loss)		$ 0		$ 1		$ 1	$ 3

[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.