Litigation, Contractual Commitments, and Contingencies - Exit Costs Accrual Composition (Details) - USD ($) $ in Millions	Dec. 31, 2019	Dec. 31, 2018
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Exit Cost Accruals	$ 66	$ 144
Future obligations under land lease agreements | Caesars Entertainment Operating Company | Discontinued Operations, Disposed of by Means Other than Sale, Abandonment
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Exit Cost Accruals	0	43
Iowa greyhound pari-mutuel racing fund | Caesars Entertainment Operating Company | Discontinued Operations, Disposed of by Means Other than Sale, Abandonment
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Exit Cost Accruals	17	33
Permanent closure of international properties | Caesars Entertainment Operating Company | Discontinued Operations, Disposed of by Means Other than Sale, Abandonment
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Exit Cost Accruals	0	10
Unbundling of electric service provided by NV Energy
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Exit Cost Accruals	$ 49	$ 58