v3.25.1
Income Taxes (Loss Carryforwards) (Details) - USD ($)
$ in Millions
Apr. 30, 2025
Apr. 30, 2024
Operating Loss Carryforwards [Line Items]    
Loss and Credit Carryforwards $ 203 $ 271
Deferred Tax Assets, Loss and Credit Carryforwards 57 65
Loss and Credit Carryforwards, Valuation Allowance (25) (16)
Interest Carryforwards 91 74
Deferred Tax Asset, Interest Carryforward 23 [1] 18
Interest Carryforwards, Valuation Allowance (10) 0
Total Carryforwards 294 345
Deferred Tax Asset, Total Carryforwards 80 83
Total Carryforwards, Valuation Allowance (35) (16)
Domestic Tax Authority    
Operating Loss Carryforwards [Line Items]    
Loss and Credit Carryforwards 68 110
Deferred Tax Assets, Loss and Credit Carryforwards 31 [2] 38
Loss and Credit Carryforwards, Valuation Allowance (10) (7)
Domestic Tax Authority | Not Subject to Expiration [Member]    
Operating Loss Carryforwards [Line Items]    
Deferred Tax Assets, Loss and Credit Carryforwards 12  
Domestic Tax Authority | Subject to Expiration [Member]    
Operating Loss Carryforwards [Line Items]    
Deferred Tax Assets, Loss and Credit Carryforwards 19  
Foreign Tax Authority [Member]    
Operating Loss Carryforwards [Line Items]    
Loss and Credit Carryforwards 135 161
Deferred Tax Assets, Loss and Credit Carryforwards 26 [3] 27
Loss and Credit Carryforwards, Valuation Allowance (15) $ (9)
Foreign Tax Authority [Member] | Not Subject to Expiration [Member]    
Operating Loss Carryforwards [Line Items]    
Deferred Tax Assets, Loss and Credit Carryforwards 23  
Foreign Tax Authority [Member] | Subject to Expiration [Member]    
Operating Loss Carryforwards [Line Items]    
Deferred Tax Assets, Loss and Credit Carryforwards $ 3  
[1] The interest expense limitation carryforwards do not expire.
[2] As of April 30, 2025, the deferred tax asset amount includes credit carryforwards of $12 that do not expire and loss and credit carryforwards of $19 that expire in varying amounts from 2026 to 2050.
[3] As of April 30, 2025, the deferred tax asset includes loss carryforwards of $23 that do not expire and $3 that expire in varying amounts over the next 10 years.