Segment Reporting (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
Segment Reporting Information [Line Items]
Revenues		$ 2,259	$ 2,348	$ 1,902	$ 1,754	$ 2,029	$ 2,319	$ 2,124	$ 2,304	$ 8,263	$ 8,776	$ 8,415
Operating Profit		180	$ 556	$ 128	$ 97	94	$ 300	$ 204	$ 303	961	901	941
Interest income, net	[1]									43	39	36
Investment gain (loss)	[1]									104	63	(27)
Income Before Income Taxes										1,108	1,003	950
Depreciation and amortization										450	428	445
Impairment Charges										66	49	52
Capital Spending										419	435	470
Total Assets		10,875				6,950				10,875	6,950
Combined Elimination [Member]
Segment Reporting Information [Line Items]
Revenues										58	38	16
Revenue From External Customers [Member]
Segment Reporting Information [Line Items]
Revenues										8,263	8,776	8,415
Revenue From External Customers [Member] | KFC [Member]
Segment Reporting Information [Line Items]
Revenues										5,821	6,039	5,688
Revenue From External Customers [Member] | Pizza Hut [Member]
Segment Reporting Information [Line Items]
Revenues										1,730	2,054	2,111
Revenue From External Customers [Member] | All Other Segments [Member]
Segment Reporting Information [Line Items]
Revenues										173	121	99
Corporate and Unallocated [Member]
Segment Reporting Information [Line Items]
Revenues	[1]									565	562	517	[2]
Unallocated revenues from transactions with franchisees and unconsolidated affiliates	[3]									533	558	514
Unallocated Other revenues										32	4	3
Unallocated expenses for transactions with franchisees and unconsolidated affiliates	[3]									(531)	(554)	(512)
Unallocated Other operating costs and expenses										(30)	(4)	(2)
Unallocated and corporate G&A expenses										(144)	(145)	(128)
Unallocated Closures and impairment expense	[4]										(11)	(12)
Unallocated Other income	[5]									245	4	98
Depreciation and amortization										14	13	12
Impairment Charges	[4]										11	12
Capital Spending										96	90	95
Total Assets	[6]	5,507				2,674				5,507	2,674
Corporate and Unallocated [Member] | Revenue From External Customers [Member]
Segment Reporting Information [Line Items]
Revenues	[1]									539	562	517
Operating Segments [Member] | KFC [Member]
Segment Reporting Information [Line Items]
Revenues										5,821	6,040	5,688
Operating Profit	[7]									801	949	895
Depreciation and amortization										315	290	296
Impairment Charges	[8]									32	16	14
Capital Spending										257	264	292
Total Assets	[9]	4,084				3,160				4,084	3,160
Operating Segments [Member] | Pizza Hut [Member]
Segment Reporting Information [Line Items]
Revenues										1,730	2,054	2,111
Operating Profit										62	114	97
Depreciation and amortization										113	120	129
Impairment Charges	[8]									29	20	26
Capital Spending										61	71	77
Total Assets		906				950				906	950
Operating Segments [Member] | All Other Segments [Member]
Segment Reporting Information [Line Items]
Revenues										205	158	115
Operating Profit										(7)	(14)	(12)
Depreciation and amortization										8	5	8
Impairment Charges	[8]									5	2
Capital Spending										5	10	6
Total Assets		$ 378				$ 166				378	166
Operating Segments [Member] | Revenue From External Customers [Member]
Segment Reporting Information [Line Items]
Revenues										8,263	8,776	8,415
Elimination [Member]
Segment Reporting Information [Line Items]
Revenues										(58)	(38)	(16)
Elimination [Member] | KFC [Member]
Segment Reporting Information [Line Items]
Revenues											1
Elimination [Member] | All Other Segments [Member]
Segment Reporting Information [Line Items]
Revenues										32	37	16
Elimination [Member] | Corporate and Unallocated [Member]
Segment Reporting Information [Line Items]
Revenues	[1]									26
Combined [Member]
Segment Reporting Information [Line Items]
Revenues										$ 8,321	$ 8,814	$ 8,431

[1] Amounts have not been allocated to any segment for performance reporting purposes.

[2] As COFFii & JOY and our e-commerce business became operating segments starting from the first quarter of 2019, revenue by segment information for 2018 has been recast to align with the change in segment reporting. Additional details on our reportable segments are included in Note 17.

[3] Primarily includes revenues and associated expenses of transactions with franchisees and unconsolidated affiliates derived from the Company’s central procurement model whereby the Company centrally purchases substantially all food and paper products from suppliers then sells and delivers to KFC and Pizza Hut restaurants, including franchisees and unconsolidated affiliates. Amounts have not been allocated to any segment for purposes of making operating decisions or assessing financial performance as the transactions are deemed corporate revenues and expenses in nature.

[4] Includes impairment charges on intangible assets and goodwill attributable to the Daojia business in 2019 and 2018, respectively. See Note 5.

[5] In 2020 and 2018, the unallocated other income primarily includes gain from re-measurement of previously held equity interest in connection with the acquisition of Suzhou KFC and Wuxi KFC, respectively. See Note 5.

[6] Primarily includes cash and cash equivalents, short-term investments, investment in equity securities, long-term time deposits and inventories that are centrally managed.

[7] Includes equity income from investments in unconsolidated affiliates of $63 million, $69 million and $65 million in 2020, 2019 and 2018, respectively.

[8] Primarily includes store closure impairment charges, restaurant-level impairment charges resulting from our semi-annual impairment evaluation as well as our additional impairment evaluation performed in the first quarter of 2020 in response to adverse impact from the COVID-19 pandemic, and incremental restaurant-level impairment charges in the first quarter of 2019 as a result of adopting ASC 842. (See Note 12).  

[9] Includes investments in unconsolidated affiliates.