Current report of foreign issuer pursuant to Rules 13a-16 and 15d-16 Amendments

Derivative financial instruments (Narrative) (Details)

v3.21.2
Derivative financial instruments (Narrative) (Details) - USD ($)
6 Months Ended
Jun. 30, 2021
Dec. 31, 2020
Derivative Instruments and Hedging Activities Disclosure [Abstract]    
Derivative cash collateral, advanced to counterparties $ 0 $ 0
Cash flow hedge gain (loss) to be reclassified within 12 months $ 63,000,000