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Fair Value Measurements (Details) - Recurring - USD ($)
$ in Millions
Mar. 31, 2022
Dec. 31, 2021
Fair value of assets and liabilities    
Available for sale securities $ 5 $ 12
Derivative assets 201 74
Derivative liabilities 62 32
Long-term debt 1,763 1,957
Level 1    
Fair value of assets and liabilities    
Available for sale securities 5 12
Derivative assets 134 49
Derivative liabilities 59 22
Level 2    
Fair value of assets and liabilities    
Derivative assets 67 25
Derivative liabilities 3 10
Long-term debt $ 1,763 $ 1,957