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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