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Borrowings - Narrative (Details)
12 Months Ended
Dec. 31, 2021
USD ($)
Line of Credit Facility [Line Items]  
Letters of credit outstanding $ 155,900,000
Interest coverage ratio 1760.00%
Revolving Credit Facility | Credit Agreement  
Line of Credit Facility [Line Items]  
Maximum borrowing capacity $ 1,000,000,000
Term 5 years
Interest coverage ratio required 300.00%
Outstanding borrowings $ 0