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Derivative contracts (Tables)
9 Months Ended
Sep. 30, 2020
Derivative Instruments And Hedging Activities Disclosure [Abstract]  
Derivative contracts outstanding The liabilities and related notional values of these contracts follow (in millions).

 

 

Liabilities

 

 

Notional

Value

 

September 30, 2020

 

$

1,547

 

 

$

12,472

 

December 31, 2019

 

 

968

 

 

 

14,385