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Revenues from Franchised Restaurants (Detail) - USD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Franchisor Disclosure [Line Items] |  |  |
Rents | $ 6,844.7 | $ 7,500.2 | $ 7,082.2
Royalties | 3,831.5 | 4,107.1 | 3,886.3
Initial Fees | 49.9 | 48.4 | 44.0
Revenues from franchised restaurants | $ 10,726.1 | $ 11,655.7 | $ 11,012.5

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