Derivative financial instruments (Narrative) (Details) - USD ($) |
6 Months Ended | |
|---|---|---|
Jun. 30, 2021 |
Dec. 31, 2020 |
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| 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 |
| X | ||||||||||
- Definition The estimated net amount of existing gains or losses on cash flow hedges at the reporting date expected to be reclassified to earnings within the next 12 months. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Definition Amount of right to receive cash collateral under master netting arrangements that have not been offset against derivative liabilities. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- References No definition available.
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