Note 2. Summary of Significant Accounting Policies Summary of Significant Accounting Policies (Details 5) - USD ($) $ in Millions	12 Months Ended			18 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2018
Costs associated with PH U.S. Acceleration Agreement	$ 25.0	$ 25.0	$ 39.0
Advertising Expense	73.0	96.0	179.0
Cooperative Advertising Expense	1,368.0	1,208.0	0.0
Franchise and property expenses [Member] | Pizza Hut Global Division [Member]
Costs associated with PH U.S. Acceleration Agreement		12.5	25.0	$ 37.5
Franchise and property expenses [Member] | Pizza Hut Global Division [Member] | Incremental Advertising [Member]
Costs associated with PH U.S. Acceleration Agreement		12.5	25.0
Incremental Advertising [Member] | KFC Global Division [Member]
Costs associated with KFC U.S. Acceleration Agreement		10.0	20.0
Incremental Advertising [Member] | Franchise and property expenses [Member] | KFC Global Division [Member]
Costs associated with KFC U.S. Acceleration Agreement		10.0	20.0
Advertising Cooperatives [Domain]
Advertising Expense	10.0	35.0	$ 66.0
Cooperative Advertising Expense	$ 1,133.0	$ 1,035.0