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Franchise and Property Revenues - Summary of Franchise and Property Revenues (Detail) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Sep. 30, 2017
Sep. 30, 2016
Sep. 30, 2017
Sep. 30, 2016
Other Industries [Abstract]        
Franchise royalties $ 332.8 $ 261.1 $ 883.5 $ 738.7
Property revenues 204.1 194.6 568.4 563.9
Franchise fees and other revenue 40.1 33.6 105.9 96.3
Total $ 577.0 $ 489.3 $ 1,557.8 $ 1,398.9