XML 73 R61.htm IDEA: XBRL DOCUMENT v3.21.2
Derivative Financial Instruments - Additional Information (Details)
 6 Months Ended
Jun. 30, 2021
USD ($)
numberOfCounterparties
Dec. 31, 2020
USD ($)
Derivative [Line Items]    
Number of central counterparties | numberOfCounterparties 2  
Notional value $ 7,300,000,000  
Net derivatives 18,000,000 $ 43,000,000
Estimated accumulated other comprehensive income to be reclassified in next 12 months 19,000,000  
Cash collateral held relative to derivative exposure 0 0
Cash collateral pledged 18,000,000 $ 43,000,000
CHICAGO MERCANTILE EXCHANGE    
Derivative [Line Items]    
Notional value $ 7,000,000,000.0  
Percent of total notional derivative contracts 95.10%  
Amount of variation margin included as settlement $ (120,000,000)  
London Clearing House    
Derivative [Line Items]    
Notional value $ 300,000,000  
Percent of total notional derivative contracts 4.90%  
Amount of variation margin included as settlement $ 13,000,000