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Revenue Recognition - Narrative (Details) - USD ($) | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Sep. 30, 2021 | Sep. 30, 2020 | Sep. 30, 2021 | Sep. 30, 2020 | Dec. 31, 2020
Disaggregation of Revenue [Line Items] |  |  |  |  |
Contract with customer, liability | $ 4,600,000,000 |  | $ 4,600,000,000 |  |
Accounts receivable, credit loss expense (reversal) | 100,000 | $ 0 | 100,000 | $ 0 |
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items] |  |  |  |  |
Revenues | $ 679,000,000.0 | $ 671,000,000.0 | $ 2,053,700,000 | $ 2,143,900,000 |
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2020-10-01 |  |  |  |  |
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items] |  |  |  |  |
Revenue, remaining performance obligation, percentage | 42.00% |  | 42.00% |  |
Revenue, remaining performance obligation, period | 12 months |  | 12 months |  |
Trade receivables |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Accounts receivable, allowance for credit loss | $ 0 |  | $ 0 |  | $ 0
Miscellaneous Receivables |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Accounts receivable, allowance for credit loss | $ 0 |  | $ 0 |  | $ 0

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