Other Comprehensive Income (Details) - USD ($) $ in Millions		3 Months Ended
		Jul. 31, 2023	Jul. 31, 2022
Before Tax:
Net other comprehensive income (loss)		$ 32	$ 8
Tax Effect:
Net other comprehensive income (loss)		4	(7)
Net of Tax:
Net other comprehensive income (loss)		36	1
Accumulated Foreign Currency Adjustment Attributable to Parent [Member]
Before Tax:
Net gain (loss)		37	(1)
Reclassification to earnings		0	0
Net other comprehensive income (loss)		37	(1)
Tax Effect:
Net gain (loss)		2	(4)
Reclassification to earnings		0	0
Net other comprehensive income (loss)		2	(4)
Net of Tax:
Net gain (loss)		39	(5)
Reclassification to earnings		0	0
Net other comprehensive income (loss)		39	(5)
Accumulated Net Gain (Loss) from Cash Flow Hedges Attributable to Parent [Member]
Before Tax:
Net gain (loss)		(4)	14
Reclassification to earnings	[1]	(3)	(8)
Net other comprehensive income (loss)		(7)	6
Tax Effect:
Net gain (loss)		1	(4)
Reclassification to earnings	[1]	1	2
Net other comprehensive income (loss)		2	(2)
Net of Tax:
Net gain (loss)		(3)	10
Reclassification to earnings	[1]	(2)	(6)
Net other comprehensive income (loss)		(5)	4
Accumulated Defined Benefit Plans Adjustment Attributable to Parent [Member]
Before Tax:
Net gain (loss)		0	0
Reclassification to earnings	[2]	2	3
Net other comprehensive income (loss)		2	3
Tax Effect:
Net gain (loss)		0	0
Reclassification to earnings	[2]	0	(1)
Net other comprehensive income (loss)		0	(1)
Net of Tax:
Net gain (loss)		0	0
Reclassification to earnings	[2]	2	2
Net other comprehensive income (loss)		$ 2	$ 2

[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.