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Income Taxes - Additional Information (Details) - USD ($) |  | 3 Months Ended | 12 Months Ended
--- | --- | --- | ---
Mar. 27, 2020 | Jun. 30, 2020 | Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Operating Loss Carryforwards [Line Items] |  |  |  |  |  |
Tax basis statutory rate |  |  | 21.00% | 21.00% | 21.00% | 35.00%
Percentage of tax deduction for interest expense to adjusted taxable income |  |  | 30.00% |  |  |
Percentage of tax deduction for net operating loss to current year taxable income |  |  | 80.00% |  |  |
Reclassification of alternative minimum tax credits from deferred tax assets to long term assets |  |  | $ 4,200,000 |  |  |
Provisional deferred tax benefit |  |  |  |  |  | $ 269,500,000
Provisional tax depreciation expense |  |  |  |  |  | $ 1,900,000,000
Additional tax depreciation expense |  |  |  |  | $ 286,400,000 |
Total net operating loss carryforwards |  |  | $ 6,600,000,000 |  |  |
Maximum percentage of taxable income allowed to offset by net operating loss carryforwards per year |  |  | 80.00% |  |  |
Deferred tax assets pre-tax valuation allowance |  |  | $ 924,800,000 |  |  |
Uncertain tax reserves |  |  | 0 |  |  |
Expire Between 2036 and 2037 [Member] |  |  |  |  |  |
Operating Loss Carryforwards [Line Items] |  |  |  |  |  |
Total net operating loss carryforwards |  |  | 1,700,000,000 |  |  |
No Expiration Period [Member] |  |  |  |  |  |
Operating Loss Carryforwards [Line Items] |  |  |  |  |  |
Total net operating loss carryforwards |  |  | $ 4,900,000,000 |  |  |
CARES Act [Member] |  |  |  |  |  |
Operating Loss Carryforwards [Line Items] |  |  |  |  |  |
CARES Act, tax period description |  |  | The CARES Act provides corporate taxpayers an expanded five-year net operating loss carryback period for losses earned in tax years 2018 through 2020. |  |  |
CARES Act [Member] | Internal Revenue Service (IRS) [Member] |  |  |  |  |  |
Operating Loss Carryforwards [Line Items] |  |  |  |  |  |
CARES Act, provisions | $ 44,000,000 |  |  |  |  |
Income taxes refund received, alternative minimum tax, CARES Act |  | $ 44,000,000 |  |  |  |
CARES Act [Member] | Tax Years 2018 through 2020 [Member] |  |  |  |  |  |
Operating Loss Carryforwards [Line Items] |  |  |  |  |  |
CARES Act, expanded net operating loss carryback period for losses earned | 5 years |  |  |  |  |
Maximum [Member] |  |  |  |  |  |
Operating Loss Carryforwards [Line Items] |  |  |  |  |  |
Tax effects measurement period under tax act |  |  | 1 year |  |  |
Operating loss carryforwards expiry date |  |  | Dec. 31, 2037 |  |  |
Minimum [Member] |  |  |  |  |  |
Operating Loss Carryforwards [Line Items] |  |  |  |  |  |
Operating loss carryforwards expiry date |  |  | Dec. 31, 2036 |  |  |

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