Revenue Recognition - Schedule of Disaggregation of Revenue by Types of Arrangements and Segments (Details) - USD ($) $ in Millions		3 Months Ended
		Mar. 31, 2021	Mar. 31, 2020
Disaggregation Of Revenue [Line Items]
Total revenues		$ 2,557	$ 1,754
Corporate and Unallocated [Member]
Disaggregation Of Revenue [Line Items]
Total revenues	[1]	131	140
Combined [Member]
Disaggregation Of Revenue [Line Items]
Total revenues		2,582	1,761
Elimination [Member]
Disaggregation Of Revenue [Line Items]
Total revenues		(25)	(7)
Elimination [Member] | All Other Segments [Member]
Disaggregation Of Revenue [Line Items]
Total revenues		25	7
Operating Segments [Member] | KFC [Member]
Disaggregation Of Revenue [Line Items]
Total revenues		1,832	1,269
Operating Segments [Member] | Pizza Hut [Member]
Disaggregation Of Revenue [Line Items]
Total revenues		541	324
Operating Segments [Member] | All Other Segments [Member]
Disaggregation Of Revenue [Line Items]
Total revenues		78	28
Company Sales [Member]
Disaggregation Of Revenue [Line Items]
Revenues		2,331	1,548
Company Sales [Member] | KFC [Member]
Disaggregation Of Revenue [Line Items]
Revenues		1,783	1,220
Company Sales [Member] | Pizza Hut [Member]
Disaggregation Of Revenue [Line Items]
Revenues		538	322
Company Sales [Member] | All Other Segments [Member]
Disaggregation Of Revenue [Line Items]
Revenues		10	6
Company Sales [Member] | Combined [Member]
Disaggregation Of Revenue [Line Items]
Revenues		2,331	1,548
Franchise [Member]
Disaggregation Of Revenue [Line Items]
Revenues		42	35
Franchise [Member] | KFC [Member]
Disaggregation Of Revenue [Line Items]
Revenues		33	33
Franchise [Member] | Pizza Hut [Member]
Disaggregation Of Revenue [Line Items]
Revenues		2	1
Franchise [Member] | All Other Segments [Member]
Disaggregation Of Revenue [Line Items]
Revenues		7	1
Franchise [Member] | Combined [Member]
Disaggregation Of Revenue [Line Items]
Revenues		42	35
Transactions With Franchisees and Unconsolidated Affiliates [Member]
Disaggregation Of Revenue [Line Items]
Revenues		171	161
Transactions With Franchisees and Unconsolidated Affiliates [Member] | KFC [Member]
Disaggregation Of Revenue [Line Items]
Revenues		15	16
Transactions With Franchisees and Unconsolidated Affiliates [Member] | Pizza Hut [Member]
Disaggregation Of Revenue [Line Items]
Revenues		1	1
Transactions With Franchisees and Unconsolidated Affiliates [Member] | All Other Segments [Member]
Disaggregation Of Revenue [Line Items]
Revenues		26	5
Transactions With Franchisees and Unconsolidated Affiliates [Member] | Corporate and Unallocated [Member]
Disaggregation Of Revenue [Line Items]
Revenues		129	139
Transactions With Franchisees and Unconsolidated Affiliates [Member] | Combined [Member]
Disaggregation Of Revenue [Line Items]
Revenues		171	161
Other Revenues [Member]
Disaggregation Of Revenue [Line Items]
Revenues		13	10
Other Revenues [Member] | KFC [Member]
Disaggregation Of Revenue [Line Items]
Revenues		1
Other Revenues [Member] | All Other Segments [Member]
Disaggregation Of Revenue [Line Items]
Revenues		35	16
Other Revenues [Member] | Corporate and Unallocated [Member]
Disaggregation Of Revenue [Line Items]
Revenues		2	1
Other Revenues [Member] | Combined [Member]
Disaggregation Of Revenue [Line Items]
Revenues		38	17
Other Revenues [Member] | Elimination [Member]
Disaggregation Of Revenue [Line Items]
Revenues		$ (25)	$ (7)

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