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Litigation, Contractual Commitments, and Contingencies - Additional Information (Details) - USD ($)
shares in Millions, $ in Millions
3 Months Ended 9 Months Ended 72 Months Ended
Sep. 30, 2018
Sep. 30, 2018
Sep. 01, 2023
Dec. 31, 2017
Other Commitments [Line Items]        
Bankruptcy Claims, Amount of Claims Filed   $ 614    
Accrued Liabilities $ 73 73    
Self-Insurance Reserve 185 185   $ 192
Convertible Debt [Member]        
Other Commitments [Line Items]        
Restricted Cash and Cash Equivalents $ 51 $ 51    
Common Stock, Capital Shares Reserved for Future Issuance 8 8    
CEC Convertible Notes        
Other Commitments [Line Items]        
Obligations, Fair Value Disclosure $ 33 $ 33    
VICI Properties, Inc. [Member] | Golf Courses [Member]        
Other Commitments [Line Items]        
Liabilities, Other than Long-term Debt, Noncurrent 143 143    
Debt Instrument, Annual Principal Payment 10 10    
Finance Lease, Right-of-Use Asset, Amortization 3 8    
NV Energy Exit        
Other Commitments [Line Items]        
Business Exit Costs   48    
Other Accrued Liabilities, Current $ 36 36    
Business Exit Costs Fair Value   $ 25    
Scenario, Forecast [Member] | NV Energy Exit        
Other Commitments [Line Items]        
Business Exit Costs     $ 31