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Fair Value Measurements (Details) - Fair Value, Recurring - USD ($)
$ in Millions
Mar. 31, 2023
Mar. 31, 2022
Fair value of assets and liabilities    
Marketable Securities $ 4 $ 3
Derivative assets 46 60
Derivative liabilities 109 64
Long-term debt 1,771 1,733
Level 1    
Fair value of assets and liabilities    
Marketable Securities 4 3
Derivative assets 45 49
Derivative liabilities 67 51
Long-term debt 0 0
Level 2    
Fair value of assets and liabilities    
Marketable Securities 0 0
Derivative assets 1 11
Derivative liabilities 42 13
Long-term debt 1,771 1,733
Level 3    
Fair value of assets and liabilities    
Marketable Securities 0 0
Derivative assets 0 0
Derivative liabilities 0 0
Long-term debt $ 0 $ 0