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FINANCIAL INSTRUMENTS AND FAIR VALUE MEASUREMENT - Additional Information (Details) - USD ($)
6 Months Ended 12 Months Ended
Dec. 31, 2024
Jun. 30, 2024
Jun. 30, 2023
Dec. 31, 2025
Dec. 31, 2023
Fair Value Disclosures [Abstract]          
Derivative assets         $ 2,000,000
Fair value of long-term debt   $ 4,949,000,000     5,039,000,000
Carrying value of long-term debt   $ 5,126,000,000     $ 5,217,000,000
Not Designated as Hedging Instrument | Maximum          
Derivatives not Designated as Hedges          
Foreign currency forward exchange contract term   3 months     3 months
Interest Rate Swap Agreements          
Interest Rate Risk          
Notional Amount   $ 0     $ 750,000,000
Derivatives not Designated as Hedges          
Notional amount   0     750,000,000
Interest Rate Swap Agreements | Designated as Hedging Instrument | Cash Flow Hedging          
Interest Rate Risk          
Amounts excluded from effectiveness   0 $ 0    
Amounts excluded from the measure of effectiveness   0      
Commodity Risk          
Amounts excluded from effectiveness   0 0    
Amounts excluded from the measure of effectiveness   0      
Commodity Contracts | Cash Flow Hedging | Forecast          
Commodity Risk          
Percentage of expected natural gas usage hedged 61.00%     30.00%  
Commodity Contracts | Designated as Hedging Instrument          
Fair Value Disclosures [Abstract]          
Derivative liabilities   4,000,000     7,000,000
Commodity Contracts | Designated as Hedging Instrument | Cash Flow Hedging          
Interest Rate Risk          
Amounts excluded from effectiveness   0 0    
Amounts excluded from the measure of effectiveness   0 0    
Commodity Risk          
Amounts excluded from effectiveness   0 0    
Amounts excluded from the measure of effectiveness   0 $ 0    
Foreign Exchange Forward | Not Designated as Hedging Instrument          
Interest Rate Risk          
Notional Amount   201,000,000     131,000,000
Derivatives not Designated as Hedges          
Notional amount   $ 201,000,000     $ 131,000,000