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Derivative Financial Instruments, Investments and Fair Value Measurements - Schedule of Gain (Loss) on Derivatives (Details) - USD ($)
$ in Millions
 3 Months Ended 9 Months Ended
Sep. 30, 2021
Sep. 30, 2020
Sep. 30, 2021
Sep. 30, 2020
Derivative Instruments, Gain (Loss) [Line Items]        
Total (loss) gain on derivatives, net $ (12) $ 5 $ (46) $ 70
Forward purchases and sales contracts, net        
Derivative Instruments, Gain (Loss) [Line Items]        
Total (loss) gain on derivatives, net 2 4 24 55
Commodity swap instruments        
Derivative Instruments, Gain (Loss) [Line Items]        
Total (loss) gain on derivatives, net (13) 1 (68) 5
Futures contracts        
Derivative Instruments, Gain (Loss) [Line Items]        
Total (loss) gain on derivatives, net $ (1) $ 0 $ (2) $ 10