v3.26.1
Other Comprehensive Income (Details) - USD ($)
$ in Millions
 3 Months Ended
Jul. 31, 2026
Jul. 31, 2025
Before Tax:    
Net other comprehensive income (loss) $ (14) $ 43
Tax Effect:    
Net other comprehensive income (loss) (2) (7)
Net of Tax:    
Net other comprehensive income (loss) (16) 36
Accumulated Foreign Currency Adjustment Attributable to Parent [Member]    
Before Tax:    
Net gain (loss) (23) 28
Reclassification to earnings 0 0
Net other comprehensive income (loss) (23) 28
Tax Effect:    
Net gain (loss) 0 (3)
Reclassification to earnings 0 0
Net other comprehensive income (loss) 0 (3)
Net of Tax:    
Net gain (loss) (23) 25
Reclassification to earnings 0 0
Net other comprehensive income (loss) (23) 25
Accumulated Gain (Loss), Net, Cash Flow Hedge, Parent [Member]    
Before Tax:    
Net gain (loss) 4 0
Reclassification to earnings [1] 4 3
Net other comprehensive income (loss) 8 3
Tax Effect:    
Net gain (loss) (1) 0
Reclassification to earnings [1] (1) (1)
Net other comprehensive income (loss) (2) (1)
Net of Tax:    
Net gain (loss) 3 0
Reclassification to earnings [1] 3 2
Net other comprehensive income (loss) 6 2
Accumulated Defined Benefit Plans Adjustment Attributable to Parent [Member]    
Before Tax:    
Net gain (loss) 0 (8)
Reclassification to earnings [2] 1 20
Net other comprehensive income (loss) 1 12
Tax Effect:    
Net gain (loss) 0 2
Reclassification to earnings [2] 0 (5)
Net other comprehensive income (loss) 0 (3)
Net of Tax:    
Net gain (loss) 0 (6)
Reclassification to earnings [2] 1 15
Net other comprehensive income (loss) $ 1 $ 9
[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.