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Summary of Significant Accounting Policies (Details 2) $ in Millions | 12 Months Ended |  |  |
--- | --- | --- | --- | ---
Dec. 31, 2020 USD ($) Years | Dec. 31, 2019 USD ($) | Dec. 31, 2018 USD ($) | Jan. 01, 2018 USD ($)
Fiscal Period Adjustment [Line Items] |  |  |  |
Goodwill Written Off Related To Sale Of Business Unit Years From Acquisition | 2 |  |  |
Fair Value Goodwill Written Off Related To Sale Of Business Unit Minimum Years Refranchised | 2 |  |  |
Number of years notes receivable and direct financing leases are beyond and would be included in other assets | 1 |  |  |
Number of years notes receivable and direct financing leases are due within and would be included in accounts and notes receivable | 1 |  |  |
Number of consecutive years of operating losses used as primary indicator of potential impairment for our semi-annual impairment testing of restaurant assets | 2 |  |  |
Accumulated Deficit | $ | $ 7,480 | $ 7,628 |  |
Difference between Revenue Guidance in Effect before and after Topic 606 [Member] |  |  |  |
Fiscal Period Adjustment [Line Items] |  |  |  |
Accumulated Deficit | $ |  |  | $ 251 | $ (240)
Accounting Standards Update 2016-13 [Member] |  |  |  |
Fiscal Period Adjustment [Line Items] |  |  |  |
Accumulated Deficit | $ | $ 8 |  |  |

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