Long-term Debt |
12 Months Ended |
|---|---|
Dec. 31, 2019 | |
| Debt Disclosure [Abstract] | |
| Long-term Debt | Long-term Debt In May 2016, we entered into a $2.0 billion senior unsecured revolving credit facility, and any amounts outstanding under this facility will be due and payable on May 20, 2021. As of December 31, 2019, no amounts had been drawn down and we were in compliance with the covenants under this facility.
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