Derivative Financial Instruments - Other Information (Details) - USD ($) |
3 Months Ended | 6 Months Ended | ||
|---|---|---|---|---|
Jun. 30, 2020 |
Jun. 30, 2019 |
Jun. 30, 2020 |
Jun. 30, 2019 |
|
| Derivative Financial Instruments | ||||
| Gains (losses) excluded from the assessment of hedge effectiveness for fair value hedges | ||||
| Gains (losses) excluded from the assessment of hedge effectiveness for cash flow hedges | ||||
| Gains (losses) associated with underlying exposure that did not occur or was not expected to occur for cash flow hedges | ||||