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Franchise Arrangements - Additional Information (Detail) - USD ($) | 12 Months Ended |
--- | --- | ---
Dec. 31, 2020 | Dec. 31, 2019
Franchisor Disclosure [Line Items] |  |
Franchise arrangement period | 20 years |
Net property and equipment | $ 24,958,200,000 | $ 24,160,000,000.0
Land | 6,349,100,000 | 6,026,400,000
Accumulated depreciation and amortization of property and equipment | 16,518,300,000 | $ 14,890,900,000
Deferred collection amount of rental and royalty income | 1 |
Franchise Arrangements |  |
Franchisor Disclosure [Line Items] |  |
Net property and equipment | 20,000,000,000.0 |
Land | 5,700,000,000 |
Accumulated depreciation and amortization of property and equipment | $ 12,100,000,000 |

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