Summary of Significant Accounting Policies	12 Months Ended
Summary of Significant Accounting Policies	Dec. 31, 2021
Accounting Policies [Abstract]
Summary of Significant Accounting Policies	Summary of Significant Accounting Policies Additional significant accounting policy disclosures are provided within the applicable notes to the Financial Statements. Cash and Cash Equivalents Cash equivalents include investments in money market funds that can be redeemed immediately at the current net asset value per share. A money market fund is a mutual fund whose investments are primarily in short-term debt securities designed to maximize current income with liquidity and capital preservation, usually maintaining per share net asset value at a constant amount, such as one dollar. Cash and cash equivalents also include cash maintained for gaming operations. The carrying amounts approximate the fair value because of the short maturity of those instruments (Level 1). Restricted Cash and Investments Restricted cash includes certificates of deposit and cash restricted under certain operating agreements or restricted for future capital expenditures in the normal course of business. Investments consist primarily of debt and equity securities, held by the Company’s captive insurance subsidiaries, which are regularly purchased with the intention to resell in the short term. Restricted investments included shares acquired in conjunction with the Company’s sports betting agreements with William Hill that contained restrictions related to the ability to liquidate shares within a specified timeframe. As a result of the William Hill Acquisition, no restricted investments are held as of December 31, 2021. Trading securities are carried at fair value with changes in fair value recognized in current period income (See Note 8). Advertising Advertising costs are expensed in the period the advertising initially takes place. Advertising costs were $518 million, $64 million and $29 million for the years ended December 31, 2021, 2020 and 2019, respectively, and are included within operating expenses. During the year ended December 31, 2021, the Company launched television, radio and internet marketing campaigns promoting the Caesars Sportsbook. Advertising costs related to the Caesars Digital segment are primarily recorded in Casino and pari-mutuel commissions expense. Reclassifications Certain reclassifications of prior year presentations have been made to conform to the current period presentation. In June 2021, the Indiana Gaming Commission amended its order that previously required the Company to sell a third casino asset in the state. As a result, Horseshoe Hammond no longer meets the held for sale criteria. The assets and liabilities held for sale have been reclassified as held and used for all periods presented measured at the lower of the carrying amount, adjusted for depreciation and amortization that would have been recognized had the assets been continuously classified as held and used, and the fair value at the date of the amended ruling. Additionally, amounts previously presented in discontinued operations have been reclassified into continuing operations for all relevant periods presented. Recently Issued Accounting Pronouncements Pronouncements Implemented in 2021 Effective January 1, 2021, we adopted Accounting Standards Updates (“ASU”) 2018-14, Compensation – Retirement Benefits – Defined Benefit Plans – General and ASU 2020-06, Debt with Conversion and Other Options and Derivatives and Hedging, which did not have a material effect on our Financial Statements. Pronouncements to Be Implemented in Future Periods In March 2020, the FASB issued ASU 2020-04 (amended through January 2021), Reference Rate Reform. The amendments in this update are intended to provide relief to the companies that have contracts, hedging relationships or other transactions that reference the London Inter-bank Offered Rate (“LIBOR”) or another reference rate which is expected to be discontinued because of reference rate reform on a prospective basis. The amendments provide optional expedients and exceptions for applying GAAP to contracts, hedging relationships, and other transactions if certain criteria are met. The adoption of, and future elections under, ASU 2020-04 are not expected to have a material impact on our Financial Statements as the standard will ease, if warranted, the requirements for accounting for the future effects of the rate reform. The amendments in this update are effective as of March 12, 2020 and companies may elect to apply the amendments prospectively through December 31, 2022. We have not yet adopted this new guidance as of December 31, 2021. LIBOR is expected to be discontinued by lending institutions after December 31, 2021 for new debt agreements and after June 30, 2023 no additional LIBOR rates will be available. We have variable rate debt instruments which are subject to LIBOR interest rates plus a margin or base rate. Our CRC Credit Facility contains alternative rates in the event that LIBOR is no longer available. The Baltimore Term Loan has been amended and we intend to work with our lenders to ensure any transition away from LIBOR will have minimal impact on our financial condition, but can provide no assurances regarding the impact of the discontinuation of LIBOR. Our interest rate swaps mature on December 31, 2022.