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Derivative Financial Instruments - Narrative (Details) $ in Thousands | Dec. 31, 2020 USD ($) | Dec. 31, 2019 USD ($) | Jan. 22, 2019 USD ($) derivativeInstrumentHeld
--- | --- | --- | ---
Derivative [Line Items] |  |  |
Derivative liabilities | $ 228,145 | $ 117,327 |
Number of cash flows entered into | derivativeInstrumentHeld |  |  | 3
Derivative, notional amount | 16,925,400 | 15,841,300 |
Existing loss expected to be reclassified into earnings | (49,300) |  |
Variable Rate Debt |  |  |
Derivative [Line Items] |  |  |
Long-term debt | 2,000,000 |  | $ 2,000,000
Other Current Assets |  |  |
Derivative [Line Items] |  |  |
Derivative assets | 139,300 | 72,100 |
Other Current Liabilities |  |  |
Derivative [Line Items] |  |  |
Derivative liabilities | 127,700 |  |
Derivative, notional amount |  | $ 60,900 |
Other Long Term Assets |  |  |
Derivative [Line Items] |  |  |
Derivative assets | 16,600 |  |
Other Long Term Liabilities |  |  |
Derivative [Line Items] |  |  |
Derivative liabilities | $ 12,500 |  |

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