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Leasing Arrangements - Additional Information (Detail) - USD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Operating Leased Assets [Line Items] |  |  |
Net Investment in Lease, Change in Present Value, Expense (Reversal) | $ 600.0 |  |
Lease term | 20 years |  |
Weighted Average Lease Term | 20 years |  |
Operating Lease, Weighted Average Discount Rate, Percent | 3.80% | 4.00% |
Company-operated restaurants: |  |  |
Operating Leased Assets [Line Items] |  |  |
Percent rents in excess of minimum rents | $ 53.7 | $ 74.4 | $ 82.1
Franchised restaurants: |  |  |
Operating Leased Assets [Line Items] |  |  |
Percent rents in excess of minimum rents | $ 136.5 | $ 200.7 | $ 200.8
Minimum |  |  |
Operating Leased Assets [Line Items] |  |  |
Escalation timing | 1 year |  |
Maximum |  |  |
Operating Leased Assets [Line Items] |  |  |
Escalation timing | 5 years |  |

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