Summary of Significant Accounting Policies (Details) $ in Millions		3 Months Ended								9 Months Ended	12 Months Ended
		Dec. 31, 2018 USD ($) weeks	Sep. 30, 2018 USD ($)	Jun. 30, 2018 USD ($)	Mar. 31, 2018 USD ($)	Dec. 31, 2017 USD ($)	Sep. 30, 2017 USD ($)	Jun. 30, 2017 USD ($)	Mar. 31, 2017 USD ($)	Sep. 30, 2018 weeks	Dec. 31, 2018 USD ($)	Dec. 31, 2017 USD ($)	Dec. 31, 2016 USD ($)	Dec. 31, 2015 USD ($)	Jan. 01, 2018 USD ($)
Schedule of Equity Method Investments [Line Items]
Number of weeks in each of the first three quarters of each fiscal year | weeks		16								12
Business Acquisitions, Purchase Price Allocation, Year of Acquisition, Description											$ 77.0
Payments to Acquire Businesses, Net of Cash Acquired											66.0	$ 0.0	$ 0.0
Deferred Revenue		$ 414.0									414.0				$ 392.0
Future lease payments due from franchisees on a nominal basis		1,100.0									1,100.0
Reclassification of Retained Earnings to Common Stock for Share Repurchase											2,356.0	1,915.0	5,399.0
Revenues											5,688.0		6,356.0
Deferred Revenue, Revenue Recognized											(66.0)
Deferred Revenue, Additions											102.0
Retained Earnings
Schedule of Equity Method Investments [Line Items]
Employee Stock Option and SARs Exercises, Value												20.0
Product [Member]
Schedule of Equity Method Investments [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax		477.0	$ 499.0	$ 512.0	$ 512.0	$ 890.0	$ 871.0	$ 909.0	$ 902.0		2,000.0	3,572.0	4,189.0
Advertising [Member]
Schedule of Equity Method Investments [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax		372.0	287.0	272.0	275.0						1,206.0	0.0	0.0
UNITED STATES
Schedule of Equity Method Investments [Line Items]
Rental income											54.0
UNITED STATES | Product [Member]
Schedule of Equity Method Investments [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax											1,143.0
UNITED STATES | Franchise [Member]
Schedule of Equity Method Investments [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax											994.0
UNITED STATES | Advertising [Member]
Schedule of Equity Method Investments [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax											706.0
CHINA | Franchise [Member]
Schedule of Equity Method Investments [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax											260.0
Other, Outside the U.S. and China [Member]
Schedule of Equity Method Investments [Line Items]
Rental income											77.0
Other, Outside the U.S. and China [Member] | Product [Member]
Schedule of Equity Method Investments [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax											857.0
Other, Outside the U.S. and China [Member] | Franchise [Member]
Schedule of Equity Method Investments [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax											1,097.0
Other, Outside the U.S. and China [Member] | Advertising [Member]
Schedule of Equity Method Investments [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax											500.0
KFC Global Division [Member]
Schedule of Equity Method Investments [Line Items]
Revenues											2,644.0
KFC Global Division [Member] | UNITED STATES
Schedule of Equity Method Investments [Line Items]
Rental income											23.0
KFC Global Division [Member] | UNITED STATES | Product [Member]
Schedule of Equity Method Investments [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax											72.0
KFC Global Division [Member] | UNITED STATES | Franchise [Member]
Schedule of Equity Method Investments [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax											171.0
KFC Global Division [Member] | UNITED STATES | Advertising [Member]
Schedule of Equity Method Investments [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax											9.0
KFC Global Division [Member] | CHINA | Franchise [Member]
Schedule of Equity Method Investments [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax											201.0
KFC Global Division [Member] | Other, Outside the U.S. and China [Member]
Schedule of Equity Method Investments [Line Items]
Rental income											74.0
KFC Global Division [Member] | Other, Outside the U.S. and China [Member] | Product [Member]
Schedule of Equity Method Investments [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax											822.0
KFC Global Division [Member] | Other, Outside the U.S. and China [Member] | Franchise [Member]
Schedule of Equity Method Investments [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax											825.0
KFC Global Division [Member] | Other, Outside the U.S. and China [Member] | Advertising [Member]
Schedule of Equity Method Investments [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax											447.0
Pizza Hut Global Division [Member]
Schedule of Equity Method Investments [Line Items]
Revenues											988.0
Pizza Hut Global Division [Member] | UNITED STATES
Schedule of Equity Method Investments [Line Items]
Rental income											4.0
Pizza Hut Global Division [Member] | UNITED STATES | Product [Member]
Schedule of Equity Method Investments [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax											37.0
Pizza Hut Global Division [Member] | UNITED STATES | Franchise [Member]
Schedule of Equity Method Investments [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax											284.0
Pizza Hut Global Division [Member] | UNITED STATES | Advertising [Member]
Schedule of Equity Method Investments [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax											269.0
Pizza Hut Global Division [Member] | CHINA | Franchise [Member]
Schedule of Equity Method Investments [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax											59.0
Pizza Hut Global Division [Member] | Other, Outside the U.S. and China [Member]
Schedule of Equity Method Investments [Line Items]
Rental income											3.0
Pizza Hut Global Division [Member] | Other, Outside the U.S. and China [Member] | Product [Member]
Schedule of Equity Method Investments [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax											32.0
Pizza Hut Global Division [Member] | Other, Outside the U.S. and China [Member] | Franchise [Member]
Schedule of Equity Method Investments [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax											248.0
Pizza Hut Global Division [Member] | Other, Outside the U.S. and China [Member] | Advertising [Member]
Schedule of Equity Method Investments [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax											52.0
Taco Bell Global Division [Member]
Schedule of Equity Method Investments [Line Items]
Revenues											2,056.0
Taco Bell Global Division [Member] | UNITED STATES
Schedule of Equity Method Investments [Line Items]
Rental income											27.0
Taco Bell Global Division [Member] | UNITED STATES | Product [Member]
Schedule of Equity Method Investments [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax											1,034.0
Taco Bell Global Division [Member] | UNITED STATES | Franchise [Member]
Schedule of Equity Method Investments [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax											539.0
Taco Bell Global Division [Member] | UNITED STATES | Advertising [Member]
Schedule of Equity Method Investments [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax											428.0
Taco Bell Global Division [Member] | CHINA | Franchise [Member]
Schedule of Equity Method Investments [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax											0.0
Taco Bell Global Division [Member] | Other, Outside the U.S. and China [Member]
Schedule of Equity Method Investments [Line Items]
Rental income											0.0
Taco Bell Global Division [Member] | Other, Outside the U.S. and China [Member] | Product [Member]
Schedule of Equity Method Investments [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax											3.0
Taco Bell Global Division [Member] | Other, Outside the U.S. and China [Member] | Franchise [Member]
Schedule of Equity Method Investments [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax											24.0
Taco Bell Global Division [Member] | Other, Outside the U.S. and China [Member] | Advertising [Member]
Schedule of Equity Method Investments [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax											1.0
Foreign Currency Gain (Loss) and Refranchising Gain (Loss) [Member]
Schedule of Equity Method Investments [Line Items]
Deferred Revenue, Period Increase (Decrease)	[1]										(14.0)
1 year [Member]
Schedule of Equity Method Investments [Line Items]
Deferred Revenue, Revenue Expected to be Recognized		60.0									60.0
2 years [Member]
Schedule of Equity Method Investments [Line Items]
Deferred Revenue, Revenue Expected to be Recognized		55.0									55.0
3 years [Member]
Schedule of Equity Method Investments [Line Items]
Deferred Revenue, Revenue Expected to be Recognized		51.0									51.0
4 years [Member]
Schedule of Equity Method Investments [Line Items]
Deferred Revenue, Revenue Expected to be Recognized		47.0									47.0
5 years [Member]
Schedule of Equity Method Investments [Line Items]
Deferred Revenue, Revenue Expected to be Recognized		42.0									42.0
Thereafter 5 years [Member]
Schedule of Equity Method Investments [Line Items]
Deferred Revenue, Revenue Expected to be Recognized		159.0									159.0
Incremental Advertising [Member] | KFC Global Division [Member]
Schedule of Equity Method Investments [Line Items]
Costs associated with KFC U.S. Acceleration Agreement											10.0	20.0	20.0	$ 10.0
Incremental Advertising [Member] | Pizza Hut Global Division [Member]
Schedule of Equity Method Investments [Line Items]
Costs associated with PH U.S. Acceleration Agreement											12.5
Incremental Advertising [Member] | Franchise and property expenses [Member] | Pizza Hut Global Division [Member]
Schedule of Equity Method Investments [Line Items]
Costs associated with PH U.S. Acceleration Agreement											12.5	25.0
Continuing Operations [Member]
Schedule of Equity Method Investments [Line Items]
Advertising Expense											131.0	245.0	260.0
Revenues		$ 1,558.0	$ 1,391.0	$ 1,368.0	$ 1,371.0	$ 1,577.0	$ 1,436.0	$ 1,448.0	$ 1,417.0		5,688.0	5,878.0	6,356.0
Continuing Operations [Member] | Advertising Cooperatives [Domain]
Schedule of Equity Method Investments [Line Items]
Advertising Expense											1,035.0
Continuing Operations [Member] | KFC Global Division [Member]
Schedule of Equity Method Investments [Line Items]
Revenues	[2]										2,644.0	3,110.0	3,225.0
Continuing Operations [Member] | Pizza Hut Global Division [Member]
Schedule of Equity Method Investments [Line Items]
Revenues	[2]										988.0	893.0	1,108.0
Continuing Operations [Member] | Taco Bell Global Division [Member]
Schedule of Equity Method Investments [Line Items]
Revenues	[2]										$ 2,056.0	$ 1,880.0	$ 2,025.0

[1] Includes impact of foreign currency translation as well as the recognition of deferred franchise fees into Refranchising (gain) loss upon the modification of existing franchise agreements when entering into master franchise agreements.

[2] U.S. revenues included in the combined KFC, Pizza Hut and Taco Bell Divisions totaled $2.9 billion in 2018, $2.8 billion in 2017 and $3.1 billion in 2016.