Revenue Recognition (Details) - USD ($) $ in Millions		3 Months Ended								12 Months Ended
		Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Jan. 01, 2018
Deferred Revenue, Revenue Recognized										$ (76)	$ (70)
Revenues		$ 1,743	$ 1,448	$ 1,198	$ 1,263	$ 1,694	$ 1,339	$ 1,310	$ 1,254	5,652	5,597	$ 5,688
Deferred Revenue, Additions										53	93
Deferred Revenue		415				441				415	441		$ 414
1 year [Member]
Deferred Revenue, Revenue Expected to be Recognized		64								64
2 years [Member]
Deferred Revenue, Revenue Expected to be Recognized		60								60
3 years [Member]
Deferred Revenue, Revenue Expected to be Recognized		55								55
4 years [Member]
Deferred Revenue, Revenue Expected to be Recognized		50								50
5 years [Member]
Deferred Revenue, Revenue Expected to be Recognized		44								44
Thereafter 5 years [Member]
Deferred Revenue, Revenue Expected to be Recognized		142								142
Company Sales
Revenue from Contract with Customer, Excluding Assessed Tax		566	486	403	355	490	364	359	333	1,810	1,546	2,000
Franchise contributions for advertising and other services
Revenue from Contract with Customer, Excluding Assessed Tax		$ 427	$ 323	$ 270	$ 312	$ 434	$ 330	$ 318	$ 309	1,332	1,391	1,206
United States
Rental income										65	70
United States | Company Sales
Revenue from Contract with Customer, Excluding Assessed Tax										1,309	1,014
United States | Franchise [Member]
Revenue from Contract with Customer, Excluding Assessed Tax										1,050	1,059
United States | Franchise contributions for advertising and other services
Revenue from Contract with Customer, Excluding Assessed Tax										818	811
CHINA | Franchise [Member]
Revenue from Contract with Customer, Excluding Assessed Tax										255	274
Other, Outside the U.S. and China [Member]
Rental income										60	72
Other, Outside the U.S. and China [Member] | Company Sales
Revenue from Contract with Customer, Excluding Assessed Tax										501	532
Other, Outside the U.S. and China [Member] | Franchise [Member]
Revenue from Contract with Customer, Excluding Assessed Tax										1,080	1,185
Other, Outside the U.S. and China [Member] | Franchise contributions for advertising and other services
Revenue from Contract with Customer, Excluding Assessed Tax										514	580
KFC Global Division [Member]
Revenues	[1]									2,272	2,491	2,644
KFC Global Division [Member] | United States
Rental income										16	20
KFC Global Division [Member] | United States | Company Sales
Revenue from Contract with Customer, Excluding Assessed Tax										60	74
KFC Global Division [Member] | United States | Franchise [Member]
Revenue from Contract with Customer, Excluding Assessed Tax										184	175
KFC Global Division [Member] | United States | Franchise contributions for advertising and other services
Revenue from Contract with Customer, Excluding Assessed Tax										18	10
KFC Global Division [Member] | CHINA | Franchise [Member]
Revenue from Contract with Customer, Excluding Assessed Tax										204	214
KFC Global Division [Member] | Other, Outside the U.S. and China [Member]
Rental income										58	69
KFC Global Division [Member] | Other, Outside the U.S. and China [Member] | Company Sales
Revenue from Contract with Customer, Excluding Assessed Tax										446	497
KFC Global Division [Member] | Other, Outside the U.S. and China [Member] | Franchise [Member]
Revenue from Contract with Customer, Excluding Assessed Tax										833	912
KFC Global Division [Member] | Other, Outside the U.S. and China [Member] | Franchise contributions for advertising and other services
Revenue from Contract with Customer, Excluding Assessed Tax										453	520
Pizza Hut Global Division [Member]
Revenues	[1]									1,002	1,027	988
Pizza Hut Global Division [Member] | United States
Rental income										5	6
Pizza Hut Global Division [Member] | United States | Company Sales
Revenue from Contract with Customer, Excluding Assessed Tax										21	21
Pizza Hut Global Division [Member] | United States | Franchise [Member]
Revenue from Contract with Customer, Excluding Assessed Tax										272	282
Pizza Hut Global Division [Member] | United States | Franchise contributions for advertising and other services
Revenue from Contract with Customer, Excluding Assessed Tax										317	318
Pizza Hut Global Division [Member] | CHINA | Franchise [Member]
Revenue from Contract with Customer, Excluding Assessed Tax										51	60
Pizza Hut Global Division [Member] | Other, Outside the U.S. and China [Member]
Rental income										2	3
Pizza Hut Global Division [Member] | Other, Outside the U.S. and China [Member] | Company Sales
Revenue from Contract with Customer, Excluding Assessed Tax										55	33
Pizza Hut Global Division [Member] | Other, Outside the U.S. and China [Member] | Franchise [Member]
Revenue from Contract with Customer, Excluding Assessed Tax										222	246
Pizza Hut Global Division [Member] | Other, Outside the U.S. and China [Member] | Franchise contributions for advertising and other services
Revenue from Contract with Customer, Excluding Assessed Tax										57	58
Taco Bell Global Division [Member]
Revenues	[1]									2,031	2,079	2,056
Taco Bell Global Division [Member] | United States
Rental income										44	44
Taco Bell Global Division [Member] | United States | Company Sales
Revenue from Contract with Customer, Excluding Assessed Tax										882	919
Taco Bell Global Division [Member] | United States | Franchise [Member]
Revenue from Contract with Customer, Excluding Assessed Tax										593	602
Taco Bell Global Division [Member] | United States | Franchise contributions for advertising and other services
Revenue from Contract with Customer, Excluding Assessed Tax										483	483
Taco Bell Global Division [Member] | CHINA | Franchise [Member]
Revenue from Contract with Customer, Excluding Assessed Tax										0	0
Taco Bell Global Division [Member] | Other, Outside the U.S. and China [Member]
Rental income										0	0
Taco Bell Global Division [Member] | Other, Outside the U.S. and China [Member] | Company Sales
Revenue from Contract with Customer, Excluding Assessed Tax										0	2
Taco Bell Global Division [Member] | Other, Outside the U.S. and China [Member] | Franchise [Member]
Revenue from Contract with Customer, Excluding Assessed Tax										25	27
Taco Bell Global Division [Member] | Other, Outside the U.S. and China [Member] | Franchise contributions for advertising and other services
Revenue from Contract with Customer, Excluding Assessed Tax										4	2
The Habit Burger Grill Global Division
Revenues										347	0	$ 0
The Habit Burger Grill Global Division | United States
Rental income										0
The Habit Burger Grill Global Division | United States | Company Sales
Revenue from Contract with Customer, Excluding Assessed Tax										346
The Habit Burger Grill Global Division | United States | Franchise [Member]
Revenue from Contract with Customer, Excluding Assessed Tax										1
The Habit Burger Grill Global Division | United States | Franchise contributions for advertising and other services
Revenue from Contract with Customer, Excluding Assessed Tax										0
The Habit Burger Grill Global Division | CHINA | Franchise [Member]
Revenue from Contract with Customer, Excluding Assessed Tax										0
The Habit Burger Grill Global Division | Other, Outside the U.S. and China [Member]
Rental income										0
The Habit Burger Grill Global Division | Other, Outside the U.S. and China [Member] | Company Sales
Revenue from Contract with Customer, Excluding Assessed Tax										0
The Habit Burger Grill Global Division | Other, Outside the U.S. and China [Member] | Franchise [Member]
Revenue from Contract with Customer, Excluding Assessed Tax										0
Other, Outside the U.S. and China [Member] | Other, Outside the U.S. and China [Member] | Franchise contributions for advertising and other services
Revenue from Contract with Customer, Excluding Assessed Tax										0
Foreign Currency Gain (Loss) and Refranchising Gain (Loss) [Member]
Deferred Revenue, Period Increase (Decrease)	[2]									$ (3)	$ 4

[1] U.S. revenues included in the combined KFC, Pizza Hut, Taco Bell and Habit Burger Grill Divisions totaled $3.2 billion in 2020, $3.0 billion in 2019 and $2.9 billion in 2018.

[2] (a)    Includes impact of foreign currency translation.