Items Affecting Comparability of Net Income, Financial Position and Cash Flows (Details) $ / shares in Units, shares in Millions	3 Months Ended						6 Months Ended					12 Months Ended	36 Months Ended
	Dec. 31, 2018 USD ($)	Jun. 30, 2018 USD ($) days restaurants Years $ / shares shares		Jun. 30, 2017 USD ($) restaurants $ / shares		Mar. 31, 2017 USD ($)	Jun. 30, 2018 USD ($) days restaurants Years $ / shares shares		Dec. 31, 2017 USD ($)	Jun. 30, 2017 USD ($) restaurants $ / shares		Dec. 31, 2017 USD ($)	Dec. 31, 2017 USD ($)	Jan. 01, 2018 USD ($)
Net Cash Provided by (Used in) Investing Activities							$ (42,000,000)			$ 173,000,000
Net Cash Provided by (Used in) Financing Activities							$ (1,579,000,000)			(410,000,000)
Investment Owned, Balance, Shares | shares		2.8					2.8
Equity Securities, FV-NI, Unrealized Gain (Loss)		$ 25,000,000					$ 91,000,000
Net Cash Provided by (Used in) Operating Activities							381,000,000			439,000,000
Restricted Cash														$ 58,000,000
Revenues		1,368,000,000		$ 1,448,000,000			2,739,000,000			2,865,000,000
Total Liabilities and Shareholders’ Deficit		4,326,000,000					4,326,000,000		$ 5,311,000,000			$ 5,311,000,000	$ 5,311,000,000
Cash and cash equivalents		313,000,000					313,000,000		1,522,000,000			1,522,000,000	1,522,000,000
Proceeds from refranchising of restaurants		47,000,000		136,000,000			252,000,000			321,000,000
Refranchising (gain) loss		(29,000,000)		(19,000,000)			(185,000,000)			(130,000,000)
General and Administrative Expense		208,000,000		247,000,000			427,000,000			484,000,000
Interest Income (Expense), Net		112,000,000		105,000,000			219,000,000			215,000,000
Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest		357,000,000		311,000,000			866,000,000			658,000,000
Income tax provision		36,000,000		105,000,000			112,000,000			172,000,000
Cost of Goods and Services Sold		421,000,000		748,000,000			859,000,000			1,506,000,000
Accounts and notes receivable, net		527,000,000					527,000,000		400,000,000			400,000,000	400,000,000
Prepaid expenses and other current assets		363,000,000					363,000,000		384,000,000			384,000,000	384,000,000
Advertising cooperative assets, restricted		0					0		201,000,000			201,000,000	201,000,000
Assets, Current		1,203,000,000					1,203,000,000		2,507,000,000			2,507,000,000	2,507,000,000
Property, plant and equipment, net		1,533,000,000					1,533,000,000		1,697,000,000			1,697,000,000	1,697,000,000
Goodwill		502,000,000					502,000,000		512,000,000			512,000,000	512,000,000
Intangible assets, net		90,000,000					90,000,000		110,000,000			110,000,000	110,000,000
Other assets		787,000,000					787,000,000		346,000,000			346,000,000	346,000,000
Deferred income taxes		211,000,000					211,000,000		139,000,000			139,000,000	139,000,000
Assets		4,326,000,000					4,326,000,000		5,311,000,000			5,311,000,000	5,311,000,000
Accounts payable and other current liabilities		822,000,000					822,000,000		813,000,000			813,000,000	813,000,000
Income taxes payable		48,000,000					48,000,000		123,000,000			123,000,000	123,000,000
Short-term borrowings		54,000,000					54,000,000		375,000,000			375,000,000	375,000,000
Advertising cooperative liabilities		0					0		201,000,000			201,000,000	201,000,000
Liabilities, Current		924,000,000					924,000,000		1,512,000,000			1,512,000,000	1,512,000,000
Long-term debt		9,612,000,000					9,612,000,000		9,429,000,000			9,429,000,000	9,429,000,000
Other liabilities and deferred credits		1,037,000,000					1,037,000,000		704,000,000			704,000,000	704,000,000
Liabilities		11,573,000,000					11,573,000,000		11,645,000,000			11,645,000,000	11,645,000,000
Accumulated deficit		(6,965,000,000)					(6,965,000,000)		(6,063,000,000)			(6,063,000,000)	(6,063,000,000)
Accumulated other comprehensive income (loss)		(282,000,000)					(282,000,000)		(271,000,000)			(271,000,000)	(271,000,000)
Stockholders' Equity Attributable to Parent		(7,247,000,000)					(7,247,000,000)		(6,334,000,000)			(6,334,000,000)	(6,334,000,000)
Franchisor Costs		40,000,000		54,000,000			87,000,000			100,000,000
Cooperative Advertising Expense		274,000,000		0			546,000,000			0
Other (income) expense		5,000,000		(1,000,000)			3,000,000			2,000,000
Total costs and expenses, net		919,000,000		1,029,000,000			1,737,000,000			1,962,000,000
Operating Income (Loss)		449,000,000		419,000,000			1,002,000,000			903,000,000
Other investment (income) expense, net		(23,000,000)		(1,000,000)			(89,000,000)			(2,000,000)
Other pension (income) expense		3,000,000		4,000,000			6,000,000			32,000,000
Net Income (Loss) Attributable to Parent		$ 321,000,000		$ 206,000,000			$ 754,000,000			$ 486,000,000
Earnings Per Share, Basic | $ / shares		$ 0.99		$ 0.59			$ 2.30			$ 1.37
Diluted Earnings Per Common Share | $ / shares		$ 0.97		$ 0.58			$ 2.25			$ 1.34
Equity Securities, FV-NI, Cost		$ 200,000,000					$ 200,000,000
KFC Global Division [Member]
Revenues		651,000,000		$ 770,000,000			1,309,000,000			$ 1,502,000,000
Refranchising (gain) loss		(42,000,000)		41,000,000			(99,000,000)			42,000,000
Operating Income (Loss)		235,000,000		243,000,000			456,000,000			450,000,000
Unallocated [Member]
Refranchising (gain) loss		(29,000,000)		(19,000,000)			(185,000,000)			(130,000,000)
General and Administrative Expense		40,000,000	[1]	69,000,000	[1]		84,000,000			122,000,000
Cost of Goods and Services Sold		1,000,000		0			1,000,000			0
Franchisor Costs		1,000,000	[2]	13,000,000	[2]		2,000,000			16,000,000
Other (income) expense		5,000,000		(2,000,000)			4,000,000			0
Pizza Hut Global Division [Member]
Revenues		233,000,000		222,000,000			484,000,000			456,000,000
Refranchising (gain) loss		13,000,000		11,000,000			11,000,000			13,000,000
Operating Income (Loss)		81,000,000		85,000,000			169,000,000			168,000,000
Unallocated and General and administrative expenses [Domain]
Costs associated with PH U.S. Acceleration Agreement												39,000,000
Taco Bell Global Division [Member]
Revenues		484,000,000		456,000,000			946,000,000			907,000,000
Refranchising (gain) loss		0		(71,000,000)			(97,000,000)			(185,000,000)
Operating Income (Loss)		149,000,000		152,000,000			281,000,000			293,000,000
General and Administrative Expense [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost		2,000,000		16,000,000			1,000,000			18,000,000
General and Administrative Expense [Member] | Unallocated [Member]
Restructuring and Related Cost, Incurred Cost		$ 1,000,000		$ 4,000,000			$ 1,000,000			$ 11,000,000
Refranchising (gain) loss
Number of Restaurants Refranchised | restaurants		51		244			195			365
Franchise and property expenses [Member] | Unallocated and General and administrative expenses [Domain]
Costs associated with PH U.S. Acceleration Agreement												31,000,000
Previously Reported [Member]
Total Liabilities and Shareholders’ Deficit									5,311,000,000			5,311,000,000	5,311,000,000
Cash and cash equivalents									1,522,000,000			1,522,000,000	1,522,000,000
Accounts and notes receivable, net									400,000,000			400,000,000	400,000,000
Prepaid expenses and other current assets									384,000,000			384,000,000	384,000,000
Advertising cooperative assets, restricted									201,000,000			201,000,000	201,000,000
Assets, Current									2,507,000,000			2,507,000,000	2,507,000,000
Property, plant and equipment, net									1,697,000,000			1,697,000,000	1,697,000,000
Goodwill									512,000,000			512,000,000	512,000,000
Intangible assets, net									110,000,000			110,000,000	110,000,000
Other assets									346,000,000			346,000,000	346,000,000
Deferred income taxes									139,000,000			139,000,000	139,000,000
Assets									5,311,000,000			5,311,000,000	5,311,000,000
Accounts payable and other current liabilities									813,000,000			813,000,000	813,000,000
Income taxes payable									123,000,000			123,000,000	123,000,000
Short-term borrowings									375,000,000			375,000,000	375,000,000
Advertising cooperative liabilities									201,000,000			201,000,000	201,000,000
Liabilities, Current									1,512,000,000			1,512,000,000	1,512,000,000
Long-term debt									9,429,000,000			9,429,000,000	9,429,000,000
Other liabilities and deferred credits									704,000,000			704,000,000	704,000,000
Liabilities									11,645,000,000			11,645,000,000	11,645,000,000
Accumulated deficit									(6,063,000,000)			(6,063,000,000)	(6,063,000,000)
Accumulated other comprehensive income (loss)									(271,000,000)			(271,000,000)	(271,000,000)
Stockholders' Equity Attributable to Parent									(6,334,000,000)			(6,334,000,000)	(6,334,000,000)
Balances with Adoption of Topic 606 [Domain]
Total Liabilities and Shareholders’ Deficit														5,464,000,000
Cash and cash equivalents														1,533,000,000
Accounts and notes receivable, net														512,000,000
Prepaid expenses and other current assets														460,000,000
Advertising cooperative assets, restricted														0
Assets, Current														2,505,000,000
Property, plant and equipment, net														1,708,000,000
Goodwill														512,000,000
Intangible assets, net														110,000,000
Other assets														464,000,000
Deferred income taxes														165,000,000
Assets														5,464,000,000
Accounts payable and other current liabilities														1,033,000,000
Income taxes payable														123,000,000
Short-term borrowings														375,000,000
Advertising cooperative liabilities														0
Liabilities, Current														1,531,000,000
Long-term debt														9,429,000,000
Other liabilities and deferred credits														1,057,000,000
Liabilities														12,017,000,000
Accumulated deficit														(6,303,000,000)
Accumulated other comprehensive income (loss)														(250,000,000)
Stockholders' Equity Attributable to Parent														(6,553,000,000)
Property, Plant and Equipment [Member]
Costs associated with PH U.S. Acceleration Agreement												8,000,000
Accounting Standards Update 2014-09 [Member]
Restricted Cash														58,000,000
Costs associated with KFC U.S. and PH U.S. Acceleration Agreement		$ 5,000,000					$ 9,000,000
Deferred income taxes														26,000,000
Accumulated other comprehensive income (loss)														21,000,000
Difference between Revenue Guidance in Effect before and after Topic 606 [Member]
Net Cash Provided by (Used in) Operating Activities							(25,000,000)
Revenues		(265,000,000)					(535,000,000)
Total Liabilities and Shareholders’ Deficit		(159,000,000)					(159,000,000)							153,000,000
Cash and cash equivalents		(27,000,000)					(27,000,000)							11,000,000
Refranchising (gain) loss		4,000,000					4,000,000
General and Administrative Expense		0					0
Interest Income (Expense), Net		0					0
Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest		0					(4,000,000)
Income tax provision		0					(1,000,000)
Cost of Goods and Services Sold		0					0
Accounts and notes receivable, net		(103,000,000)					(103,000,000)							112,000,000
Prepaid expenses and other current assets		(46,000,000)					(46,000,000)							76,000,000	[3]
Advertising cooperative assets, restricted		176,000,000					176,000,000							(201,000,000)
Assets, Current		0					0							(2,000,000)
Property, plant and equipment, net		(16,000,000)					(16,000,000)							11,000,000
Goodwill		0					0							0
Intangible assets, net		0					0							0
Other assets		(118,000,000)					(118,000,000)							118,000,000
Deferred income taxes		(25,000,000)					(25,000,000)							26,000,000
Assets		(159,000,000)					(159,000,000)							153,000,000
Accounts payable and other current liabilities		(215,000,000)					(215,000,000)							220,000,000
Income taxes payable		0					0							0
Short-term borrowings		0					0							0
Advertising cooperative liabilities		176,000,000					176,000,000							(201,000,000)
Liabilities, Current		(39,000,000)					(39,000,000)							19,000,000
Long-term debt		0					0							0
Other liabilities and deferred credits		(336,000,000)					(336,000,000)							353,000,000
Liabilities		(375,000,000)					(375,000,000)							372,000,000
Accumulated deficit		238,000,000					238,000,000							(240,000,000)
Accumulated other comprehensive income (loss)		(22,000,000)					(22,000,000)							21,000,000
Stockholders' Equity Attributable to Parent		216,000,000					216,000,000							(219,000,000)
Franchisor Costs		5,000,000					11,000,000
Cooperative Advertising Expense		(274,000,000)					(546,000,000)
Other (income) expense		0					0
Total costs and expenses, net		(265,000,000)					(531,000,000)
Operating Income (Loss)		0					(4,000,000)	[4]
Other investment (income) expense, net		0					0
Other pension (income) expense		0					0
Net Income (Loss) Attributable to Parent		$ 0					$ (3,000,000)
Earnings Per Share, Basic | $ / shares		$ 0					$ (0.01)
Diluted Earnings Per Common Share | $ / shares		$ 0					$ (0.01)
Balances with Adoption of Topic 606 [Domain]
Revenues		$ 1,103,000,000					$ 2,204,000,000
Total Liabilities and Shareholders’ Deficit		4,167,000,000					4,167,000,000
Cash and cash equivalents		286,000,000					286,000,000
Refranchising (gain) loss		(25,000,000)					(181,000,000)
General and Administrative Expense		208,000,000					427,000,000
Interest Income (Expense), Net		112,000,000					219,000,000
Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest		357,000,000					862,000,000
Income tax provision		36,000,000					111,000,000
Cost of Goods and Services Sold		421,000,000					859,000,000
Accounts and notes receivable, net		424,000,000					424,000,000
Prepaid expenses and other current assets		317,000,000					317,000,000
Advertising cooperative assets, restricted		176,000,000					176,000,000
Assets, Current		1,203,000,000					1,203,000,000
Property, plant and equipment, net		1,517,000,000					1,517,000,000
Goodwill		502,000,000					502,000,000
Intangible assets, net		90,000,000					90,000,000
Other assets		669,000,000					669,000,000
Deferred income taxes		186,000,000					186,000,000
Assets		4,167,000,000					4,167,000,000
Accounts payable and other current liabilities		607,000,000					607,000,000
Income taxes payable		48,000,000					48,000,000
Short-term borrowings		54,000,000					54,000,000
Advertising cooperative liabilities		176,000,000					176,000,000
Liabilities, Current		885,000,000					885,000,000
Long-term debt		9,612,000,000					9,612,000,000
Other liabilities and deferred credits		701,000,000					701,000,000
Liabilities		11,198,000,000					11,198,000,000
Accumulated deficit		(6,727,000,000)					(6,727,000,000)
Accumulated other comprehensive income (loss)		(304,000,000)					(304,000,000)
Stockholders' Equity Attributable to Parent		(7,031,000,000)					(7,031,000,000)
Franchisor Costs		45,000,000					98,000,000
Cooperative Advertising Expense		0					0
Other (income) expense		5,000,000					3,000,000
Total costs and expenses, net		654,000,000					1,206,000,000
Operating Income (Loss)		449,000,000					998,000,000
Other investment (income) expense, net		(23,000,000)					(89,000,000)
Other pension (income) expense		3,000,000					6,000,000
Net Income (Loss) Attributable to Parent		$ 321,000,000					$ 751,000,000
Earnings Per Share, Basic | $ / shares		$ 0.99					$ 2.29
Diluted Earnings Per Common Share | $ / shares		$ 0.97					$ 2.24
Product [Member]
Revenues		$ 512,000,000		$ 909,000,000			$ 1,024,000,000			$ 1,811,000,000
Product [Member] | UNITED STATES
Revenues		279,000,000					552,000,000
Product [Member] | UNITED STATES | KFC Global Division [Member]
Revenues		16,000,000					33,000,000
Product [Member] | UNITED STATES | Pizza Hut Global Division [Member]
Revenues		11,000,000					25,000,000
Product [Member] | UNITED STATES | Taco Bell Global Division [Member]
Revenues		252,000,000					494,000,000
Product [Member] | Difference between Revenue Guidance in Effect before and after Topic 606 [Member]
Revenues		0					0
Product [Member] | Balances with Adoption of Topic 606 [Domain]
Revenues		512,000,000					1,024,000,000
Franchise [Member]
Revenues		584,000,000		539,000,000			1,168,000,000			1,054,000,000
Franchise [Member] | CHINA
Revenues		64,000,000					134,000,000
Franchise [Member] | CHINA | KFC Global Division [Member]
Revenues		49,000,000					103,000,000
Franchise [Member] | CHINA | Pizza Hut Global Division [Member]
Revenues		15,000,000					31,000,000
Franchise [Member] | CHINA | Taco Bell Global Division [Member]
Revenues		0					0
Franchise [Member] | UNITED STATES
Revenues		238,000,000					474,000,000
Franchise [Member] | UNITED STATES | KFC Global Division [Member]
Revenues		45,000,000					89,000,000
Franchise [Member] | UNITED STATES | Pizza Hut Global Division [Member]
Revenues		64,000,000					134,000,000
Franchise [Member] | UNITED STATES | Taco Bell Global Division [Member]
Revenues		129,000,000					251,000,000
Franchise [Member] | Difference between Revenue Guidance in Effect before and after Topic 606 [Member]
Revenues		7,000,000					12,000,000
Franchise [Member] | Balances with Adoption of Topic 606 [Domain]
Revenues		591,000,000					1,180,000,000
Advertising [Member]
Revenues		272,000,000		0			547,000,000			0
Advertising [Member] | UNITED STATES
Revenues		159,000,000					317,000,000
Advertising [Member] | UNITED STATES | KFC Global Division [Member]
Revenues		2,000,000					4,000,000
Advertising [Member] | UNITED STATES | Pizza Hut Global Division [Member]
Revenues		60,000,000					125,000,000
Advertising [Member] | UNITED STATES | Taco Bell Global Division [Member]
Revenues		97,000,000					188,000,000
Advertising [Member] | Difference between Revenue Guidance in Effect before and after Topic 606 [Member]
Revenues		(272,000,000)					(547,000,000)
Advertising [Member] | Balances with Adoption of Topic 606 [Domain]
Revenues		$ 0					$ 0
Investment closing date [Member]
Time period shares are restricted from being transferred | Years		2					2
Termination of Master Services Agreement [Member]
Time period shares are restricted from being transferred | days		30					30
Foreign Exchange Contract [Member] | Cash Flow Hedging [Member] | Maximum [Member]
Derivative, Maturity Date		Jun. 12, 2020
Equipment [Member] | Franchise and property expenses [Member] | Unallocated and General and administrative expenses [Domain]
Costs associated with KFC U.S. Acceleration Agreement													115,000,000
Equipment [Member] | Previously Reported [Member] | Franchise and property expenses [Member] | Unallocated and General and administrative expenses [Domain]
Costs associated with KFC U.S. Acceleration Agreement				5,000,000						8,000,000
Incremental Advertising [Member] | KFC Global Division [Member]
Costs associated with KFC U.S. Acceleration Agreement		$ 3,000,000		5,000,000			$ 5,000,000			9,000,000		20,000,000	50,000,000
Franchise Incentive Amortization [Member] [Member] | Accounting Standards Update 2014-09 [Member] | Other Assets [Member] | KFC Global Division [Member]
Costs associated with KFC U.S. Acceleration Agreement													100,000,000
Franchise Incentive [Member] | Franchise and property revenue [Member] | KFC Global Division [Member]
Costs associated with KFC U.S. Acceleration Agreement		3,000,000					5,000,000
Franchise Incentive [Member] | Accounting Standards Update 2014-09 [Member] | Other Assets [Member] | KFC Global Division [Member]
Costs associated with KFC U.S. Acceleration Agreement													$ (19,000,000)
2017 to 2018 [Domain] | Franchise and property expenses [Member] | Unallocated and General and administrative expenses [Domain]
Costs associated with PH U.S. Acceleration Agreement							90,000,000
2015 to 2018 [Domain] | Equipment [Member] | Franchise and property expenses [Member]
Costs associated with KFC U.S. Acceleration Agreement		130,000,000
2015 to 2018 [Domain] | Incremental Advertising [Member] | KFC Global Division [Member]
Costs associated with KFC U.S. Acceleration Agreement		60,000,000
2018 [Member] | Incremental Advertising [Member] | KFC Global Division [Member]
Costs associated with KFC U.S. Acceleration Agreement	$ 10,000,000
Capital Investments [Member]
Costs associated with PH U.S. Acceleration Agreement		4,000,000					11,000,000
Incremental Advertising [Member] | Pizza Hut Global Division [Member]
Costs associated with PH U.S. Acceleration Agreement		2,000,000					5,000,000
Incremental Advertising [Member] | Second half of 2017 to 2018 [Domain] | Pizza Hut Global Division [Member]
Costs associated with PH U.S. Acceleration Agreement		37,500,000							$ 25,000,000
Incremental Advertising [Member] | 2018 [Member] | Pizza Hut Global Division [Member]
Costs associated with PH U.S. Acceleration Agreement		12,500,000
Franchise Incentive [Member] | Previously Reported [Member] | Franchise and property expenses [Member] | Unallocated and General and administrative expenses [Domain]
Costs associated with PH U.S. Acceleration Agreement												5,000,000
Franchise Incentive [Member] | Property, Plant and Equipment [Member] | Unallocated and General and administrative expenses [Domain]
Costs associated with PH U.S. Acceleration Agreement												$ 5,000,000
Up-front Payment Arrangement [Member] | Accounting Standards Update 2014-09 [Member]
Accounts payable and other current liabilities														57,000,000
Other liabilities and deferred credits														335,000,000
Accumulated deficit														(392,000,000)
Franchise Incentive [Member] | Accounting Standards Update 2014-09 [Member]
Prepaid expenses and other current assets														18,000,000
Other assets														118,000,000
Accumulated deficit														$ 136,000,000
UNITED STATES | Other pension (income) expense [Member]
Pension data adjustment		$ 0	[5]	$ 0	[5]	$ 22,000,000	$ 0	[5]		$ 22,000,000	[5]

[1] Includes non-cash adjustments associated with share-based compensation and charges associated with YUM's Strategic Transformation Initiatives. See Note 5.

[2] Represents costs associated with the KFC U.S. Acceleration Agreement and Pizza Hut U.S. Transformation Agreement. See Note 5.

[3] Includes $58 million of restricted cash related to advertising cooperatives. These balances can only be used to settle obligations of the respective cooperatives.

[4] Includes $5 million and $9 million of franchise incentive payments related to the KFC U.S. Acceleration Agreement or the Pizza Hut U.S. Transformation Agreement that would have been expensed immediately and that we would not have allocated to the KFC Division or the Pizza Hut Division under Legacy GAAP for the quarter and year to date ended June 30, 2018, respectively. Upon the adoption of Topic 606, these payments have been capitalized as assets.

[5] Reflects a non-cash, out-of-year charge related to the adjustment of certain historical deferred vested liability balances in the Plan during the first quarter of 2017 recorded in Other pension (income) expense. See Note 5.