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Derivative contracts (Tables)
6 Months Ended
Jun. 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

 

June 30, 2020

 

$

1,565

 

 

$

14,348

 

December 31, 2019

 

 

968

 

 

 

14,385