v3.25.4
FINANCING AND FINANCIAL INSTRUMENTS - Gross Debt - Interest Rate "Step-Up" (Details)
€ in Millions, $ in Millions
Dec. 31, 2025
USD ($)
Dec. 31, 2025
EUR (€)
Sep. 30, 2025
USD ($)
Sep. 30, 2025
EUR (€)
Disclosure of detailed information about borrowings [line items]        
Borrowings $ 13,410      
750 Unsecured Notes        
Disclosure of detailed information about borrowings [line items]        
Notional amount $ 750      
Borrowings issuance price percentage (in percent) 99.72% 99.72%    
750 Unsecured Notes | Net carrying amount        
Disclosure of detailed information about borrowings [line items]        
Borrowings $ 401      
750 Unsecured Notes | Fixed interest rate        
Disclosure of detailed information about borrowings [line items]        
Borrowings, interest rate (in percent) 4.55% 4.55%    
€600 million Unsecured Notes        
Disclosure of detailed information about borrowings [line items]        
Notional amount | €   € 600    
Borrowings issuance price percentage (in percent) 99.65% 99.65%    
€600 million Unsecured Notes | Net carrying amount        
Disclosure of detailed information about borrowings [line items]        
Borrowings $ 600      
€600 million Unsecured Notes | Fixed interest rate        
Disclosure of detailed information about borrowings [line items]        
Borrowings, interest rate (in percent) 4.88% 4.88%    
1.2 billion Unsecured Bonds        
Disclosure of detailed information about borrowings [line items]        
Notional amount $ 1,200      
Borrowings issuance price percentage (in percent) 99.91% 99.91%    
1.2 billion Unsecured Bonds | Net carrying amount        
Disclosure of detailed information about borrowings [line items]        
Borrowings $ 1,200      
1.2 billion Unsecured Bonds | Fixed interest rate        
Disclosure of detailed information about borrowings [line items]        
Borrowings, interest rate (in percent) 6.55% 6.55%    
€500 million Unsecured Notes        
Disclosure of detailed information about borrowings [line items]        
Notional amount | €   € 500    
Borrowings issuance price percentage (in percent) 99.52% 99.52%    
€500 million Unsecured Notes | Net carrying amount        
Disclosure of detailed information about borrowings [line items]        
Borrowings | €   € 500    
€500 million Unsecured Notes | Fixed interest rate        
Disclosure of detailed information about borrowings [line items]        
Borrowings, interest rate (in percent) 3.13% 3.13%    
500 Unsecured Notes        
Disclosure of detailed information about borrowings [line items]        
Notional amount $ 500      
Borrowings issuance price percentage (in percent) 99.00% 99.00%    
500 Unsecured Notes | Net carrying amount        
Disclosure of detailed information about borrowings [line items]        
Borrowings $ 500      
500 Unsecured Notes | Fixed interest rate        
Disclosure of detailed information about borrowings [line items]        
Borrowings, interest rate (in percent) 4.25% 4.25%    
€650000000000 million Unsecured Notes        
Disclosure of detailed information about borrowings [line items]        
Notional amount $ 650 € 650,000 $ 754 € 650
Borrowings issuance price percentage (in percent) 99.42% 99.42%    
€650000000000 million Unsecured Notes | Fixed interest rate        
Disclosure of detailed information about borrowings [line items]        
Borrowings, interest rate (in percent) 3.25% 3.25% 3.25% 3.25%
€500 million Unsecured Notes        
Disclosure of detailed information about borrowings [line items]        
Borrowings issuance price percentage (in percent) 99.21% 99.21%    
€500 million Unsecured Notes | Net carrying amount        
Disclosure of detailed information about borrowings [line items]        
Notional amount | €   € 500    
Borrowings $ 500      
€500 million Unsecured Notes | Fixed interest rate        
Disclosure of detailed information about borrowings [line items]        
Borrowings, interest rate (in percent) 3.50% 3.50%    
1.0 billion Unsecured Notes        
Disclosure of detailed information about borrowings [line items]        
Notional amount $ 1,000      
$500 Unsecured Notes        
Disclosure of detailed information about borrowings [line items]        
Notional amount $ 500      
Borrowings issuance price percentage (in percent) 99.86% 99.86%    
$500 Unsecured Notes | Net carrying amount        
Disclosure of detailed information about borrowings [line items]        
Borrowings $ 500      
$500 Unsecured Notes | Fixed interest rate        
Disclosure of detailed information about borrowings [line items]        
Borrowings, interest rate (in percent) 6.00% 6.00%    
1.0 billion Unsecured Bonds        
Disclosure of detailed information about borrowings [line items]        
Notional amount $ 1,000      
Borrowings issuance price percentage (in percent) 95.20% 95.20%    
1.0 billion Unsecured Bonds | Net carrying amount        
Disclosure of detailed information about borrowings [line items]        
Borrowings $ 457      
1.0 billion Unsecured Bonds | Fixed interest rate        
Disclosure of detailed information about borrowings [line items]        
Borrowings, interest rate (in percent) 7.00% 7.00%    
500 Unsecured Bonds        
Disclosure of detailed information about borrowings [line items]        
Notional amount $ 500      
Borrowings issuance price percentage (in percent) 104.84% 104.84%    
500 Unsecured Bonds | Net carrying amount        
Disclosure of detailed information about borrowings [line items]        
Borrowings $ 229      
500 Unsecured Bonds | Fixed interest rate        
Disclosure of detailed information about borrowings [line items]        
Borrowings, interest rate (in percent) 7.00% 7.00%    
1000000000 billion Unsecured Notes        
Disclosure of detailed information about borrowings [line items]        
Notional amount $ 1,000      
Borrowings issuance price percentage (in percent) 99.18% 99.18%    
1000000000 billion Unsecured Notes | Net carrying amount        
Disclosure of detailed information about borrowings [line items]        
Borrowings $ 434      
1000000000 billion Unsecured Notes | Fixed interest rate        
Disclosure of detailed information about borrowings [line items]        
Borrowings, interest rate (in percent) 6.75% 6.75%    
500 Unsecured Notes        
Disclosure of detailed information about borrowings [line items]        
Notional amount $ 500      
Borrowings issuance price percentage (in percent) 99.32% 99.32%    
500 Unsecured Notes | Net carrying amount        
Disclosure of detailed information about borrowings [line items]        
Borrowings $ 500      
500 Unsecured Notes | Fixed interest rate        
Disclosure of detailed information about borrowings [line items]        
Borrowings, interest rate (in percent) 6.35% 6.35%    
1000000000 billion Unsecured Notes        
Disclosure of detailed information about borrowings [line items]        
Notional amount $ 1,000      
Borrowings issuance price percentage (in percent) 99.37% 99.37%    
1000000000 billion Unsecured Notes | Net carrying amount        
Disclosure of detailed information about borrowings [line items]        
Borrowings $ 1,000      
1000000000 billion Unsecured Notes | Fixed interest rate        
Disclosure of detailed information about borrowings [line items]        
Borrowings, interest rate (in percent) 6.80% 6.80%