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Long-Term Debt and Credit Facilities - Revolving Letters of Credit and Senior Notes (Details) - USD ($) | 12 Months Ended |
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Dec. 31, 2022 | Dec. 31, 2021
Senior Notes |  |
Long-term Debt and Credit Facilities |  |
Redemption price, percentage | 101.00% |
Letter of Credit | Uncommitted Revolving Letter of Credit Facility |  |
Long-term Debt and Credit Facilities |  |
Maximum borrowing capacity | $ 225,000,000 |
Letter of Credit | Committed Facility and Various Other Facilities |  |
Long-term Debt and Credit Facilities |  |
Letters of credit outstanding | 94,000,000 | $ 88,000,000
Revolving Credit Facility |  |
Long-term Debt and Credit Facilities |  |
Letters of credit outstanding | $ 0 | $ 0

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