Other Comprehensive Income (Details) - USD ($) $ in Millions		3 Months Ended
		Jul. 31, 2025	Jul. 31, 2024
Before Tax:
Net other comprehensive income (loss)		$ 43	$ (46)
Tax Effect:
Net other comprehensive income (loss)		(7)	3
Net of Tax:
Net other comprehensive income (loss)		36	(43)
Accumulated Foreign Currency Adjustment Attributable to Parent [Member]
Before Tax:
Net gain (loss)		28	(44)
Reclassification to earnings		0	0
Net other comprehensive income (loss)		28	(44)
Tax Effect:
Net gain (loss)		(3)	2
Reclassification to earnings		0	0
Net other comprehensive income (loss)		(3)	2
Net of Tax:
Net gain (loss)		25	(42)
Reclassification to earnings		0	0
Net other comprehensive income (loss)		25	(42)
Accumulated Gain (Loss), Net, Cash Flow Hedge, Parent [Member]
Before Tax:
Net gain (loss)		0	1
Reclassification to earnings	[1]	3	(4)
Net other comprehensive income (loss)		3	(3)
Tax Effect:
Net gain (loss)		0	0
Reclassification to earnings	[1]	(1)	1
Net other comprehensive income (loss)		(1)	1
Net of Tax:
Net gain (loss)		0	1
Reclassification to earnings	[1]	2	(3)
Net other comprehensive income (loss)		2	(2)
Accumulated Defined Benefit Plans Adjustment Attributable to Parent [Member]
Before Tax:
Net gain (loss)		(8)	0
Reclassification to earnings	[2]	20	1
Net other comprehensive income (loss)		12	1
Tax Effect:
Net gain (loss)		2	0
Reclassification to earnings	[2]	(5)	0
Net other comprehensive income (loss)		(3)	0
Net of Tax:
Net gain (loss)		(6)	0
Reclassification to earnings	[2]	15	1
Net other comprehensive income (loss)		$ 9	$ 1

[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.