Quarterly report pursuant to Section 13 or 15(d)

Financial Instruments and Risk Management (Narrative) (Details)

v3.21.2
Financial Instruments and Risk Management (Narrative) (Details)
6 Months Ended
Jun. 30, 2021
USD ($)
Derivatives [Line Items]  
Deferred net gains on derivatives accumulated in other comprehensive income expected to be reclassified to net income in next twelve months $ (5,000,000.0)
Maximum  
Derivatives [Line Items]  
Remaining maturity of derivative contracts 4 years
Aggregate unrealized gain of derivative contracts with single counterparty $ 2,400,000