Pension, Retiree Medical and Retiree Savings Plans (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2018	Dec. 31, 2017		Dec. 31, 2016	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Components of net periodic benefit cost:
Amortization of prior service cost		$ 5.0	$ 5.0
Amortization of net loss		(17.0)	(5.0)
Pension losses in accumulated other comprehensive income (loss):
Unrealized gains (losses) arising during the year		$ 32.0	(17.0)		$ (62.0)
Assumed health care cost trend rates [Abstract]
Year that rate reaches ultimate trend rate		2038
Effect of one-percentage point change in assumed health care cost trend rates [Abstract]
Maximum 401(k) participant contribution of eligible compensation		75.00%
Company match of participant contribution up to 6% of eligible compensation		100.00%
Maximum company match of participant contribution of eligible compensation		6.00%
Defined Contribution Plan, Cost		$ 12.0	13.0		14.0
Pension settlement charges			(20.0)
Foreign Pension Plan [Member]
Change in benefit obligation
Benefit obligation at beginning of year		287.0
Benefit obligation at end of year		233.0	287.0
Change in plan assets
Fair value of plan assets at beginning of year		358.0
Fair value of plan assets at end of year		319.0	358.0
Plan Assets [Abstract]
Fair value of plan assets by asset category		319.0	358.0			$ 319.0	$ 358.0
U.S. Pension Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Net Payable For Unsettled Transactions						41.0	56.0
Defined Benefit Plan, Benefit Obligation, Benefits Paid		73.0	76.0
Change in benefit obligation
Benefit obligation at beginning of year		1,007.0	993.0
Service cost		8.0	10.0		17.0
Interest cost		38.0	41.0		54.0
Plan amendments		1.0	2.0
Curtailment		0.0	(2.0)
Special termination benefits		1.0	2.0		3.0
Settlement payments	[1]	0.0	(73.0)
Actuarial (gain) loss		(109.0)	115.0
Defined Benefit Plan, Plan Assets, Administration Expense		0.0	(5.0)
Benefit obligation at end of year		873.0	1,007.0		993.0
Change in plan assets
Fair value of plan assets at beginning of year		864.0	837.0
Actual return on plan assets		(49.0)	129.0
Employer contributions		13.0	52.0
Settlement payments		0.0	(73.0)
Fair value of plan assets at end of year		755.0	864.0		837.0
Defined Benefit Plan, Plan Assets, Benefits Paid		73.0	76.0
Funded status at end of year						(118.0)	(143.0)
Benefit Payments [Abstract]
2016						39.0
2017						40.0
2018						43.0
2019						45.0
2020						48.0
2021 - 2025						269.0
Amounts recognized in the Consolidated Balance Sheet:
Accrued benefit liability - current						(5.0)	(8.0)
Accrued benefit liability - non-current						(113.0)	(135.0)
Accrued benefit amounts recognized						(118.0)	(143.0)
Amounts recognized as a loss in Accumulated Other Comprehensive Income:
Actuarial net gain						(101.0)	(134.0)
Prior service cost						(22.0)	(26.0)
Amounts recognized as a loss in Accumulated Other Comprehensive Income		(160.0)	(160.0)		(180.0)	(123.0)	(160.0)	$ (180.0)
Accumulated benefit obligation						849.0	976.0
Information for pension plans with an accumulated benefit obligation in excess of plan assets:
Projected benefit obligation						873.0	1,007.0
Accumulated benefit obligation						849.0	976.0
Fair value of plan assets						755.0	864.0
Information for pension plans with a projected benefit obligation in excess of plan assets:
Defined Benefit Plan, Pension Plan with Projected Benefit Obligation in Excess of Plan Assets, Projected Benefit Obligation						873.0	1,007.0
Accumulated benefit obligation						849.0	976.0
Defined Benefit Plan, Pension Plan with Projected Benefit Obligation in Excess of Plan Assets, Plan Assets						$ 755.0	$ 864.0
Components of net periodic benefit cost:
Service cost		8.0	10.0		17.0
Interest cost		38.0	41.0		54.0
Amortization of prior service cost	[1]	5.0	6.0		6.0
Expected return on plan assets		(44.0)	(45.0)		(65.0)
Amortization of net loss		16.0	5.0		6.0
Net periodic benefit cost		23.0	17.0		18.0
Additional loss recognized due to:
Special termination benefits		1.0	2.0		3.0
Pension losses in accumulated other comprehensive income (loss):
Beginning of year		(160.0)	(180.0)
Unrealized gains (losses) arising during the year		17.0	(10.0)
Other Comprehensive Income (Loss),Defined Benefit Plans, Curtailment Gain (Loss), before Tax		0.0	2.0
Curtailment gain		0.0	19.0
Amortization of net loss		16.0	5.0
Amortization of prior service cost		5.0	6.0
Prior service cost		(1.0)	(2.0)
End of year		$ (123.0)	$ (160.0)		$ (180.0)
Weighted-average assumptions used to determine benefit obligations at the measurement dates:
Discount rate (in hundredths)						4.60%	3.90%	4.60%
Rate of compensation increase (in hundredths)						3.00%	3.75%
Weighted-average assumptions used to determine the net periodic benefit cost for fiscal years:
Discount rate (in hundredths)		3.90%	4.53%	[2]	4.90%
Long-term rate return on plan assets (in hundredths)		5.65%	6.06%	[2]	6.75%
Rate of compensation increase (in hundredths)		3.75%	3.75%	[2]	3.75%
Plan Assets [Abstract]
Fair value of plan assets by asset category		$ 755.0	$ 837.0		$ 837.0	$ 755.0	$ 864.0	$ 837.0
Value of mutual fund held as an investment that includes YUM stock						0.3	0.3
Approximate percentage of total plan assets in investment that includes YUM stock (in hundredths)		1.00%	1.00%
Effect of one-percentage point change in assumed health care cost trend rates [Abstract]
Defined Benefit Plan, Expected Future Employer Contributions, Next Fiscal Year						0.0
Pension settlement charges	[3]	$ 0.0	$ 19.0		32.0
U.S. Pension Plans [Member] | Fair Value, Inputs, Level 1 [Member] | Cash [Member]
Change in plan assets
Fair value of plan assets at beginning of year		3.0
Fair value of plan assets at end of year		3.0	3.0
Plan Assets [Abstract]
Fair value of plan assets by asset category		3.0	3.0			3.0	3.0
U.S. Pension Plans [Member] | Fair Value, Inputs, Level 1 [Member] | Cash Equivalents [Member]
Change in plan assets
Fair value of plan assets at beginning of year	[4]	12.0
Fair value of plan assets at end of year	[4]	10.0	12.0
Plan Assets [Abstract]
Fair value of plan assets by asset category	[4]	10.0	12.0			10.0	12.0
U.S. Pension Plans [Member] | Fair Value, Inputs, Level 1 [Member] | Equity Securities - U.S. Large cap [Member]
Change in plan assets
Fair value of plan assets at beginning of year	[5]	257.0
Fair value of plan assets at end of year	[5]	215.0	257.0
Plan Assets [Abstract]
Fair value of plan assets by asset category	[5]	215.0	257.0			215.0	257.0
U.S. Pension Plans [Member] | Fair Value, Inputs, Level 1 [Member] | Equity Securities - U.S. Mid cap [Member]
Change in plan assets
Fair value of plan assets at beginning of year	[5]	43.0
Fair value of plan assets at end of year	[5]	35.0	43.0
Plan Assets [Abstract]
Fair value of plan assets by asset category	[5]	35.0	43.0			35.0	43.0
U.S. Pension Plans [Member] | Fair Value, Inputs, Level 1 [Member] | Equity Securities - U.S. Small cap [Member]
Change in plan assets
Fair value of plan assets at beginning of year	[5]	43.0
Fair value of plan assets at end of year	[5]	34.0	43.0
Plan Assets [Abstract]
Fair value of plan assets by asset category	[5]	34.0	43.0			34.0	43.0
U.S. Pension Plans [Member] | Fair Value, Inputs, Level 1 [Member] | Equity Securities - Non-U.S. [Member]
Change in plan assets
Fair value of plan assets at beginning of year	[5]	87.0
Fair value of plan assets at end of year	[5]	74.0	87.0
Plan Assets [Abstract]
Fair value of plan assets by asset category	[5]	74.0	87.0			74.0	87.0
U.S. Pension Plans [Member] | Fair Value, Inputs, Level 1 [Member] | Fixed Income Securities - U.S. Corporate [Member]
Change in plan assets
Fair value of plan assets at beginning of year	[5]	177.0
Fair value of plan assets at end of year	[5]	140.0	177.0
Plan Assets [Abstract]
Fair value of plan assets by asset category	[5]	140.0	177.0			140.0	177.0
U.S. Pension Plans [Member] | Fair Value, Inputs, Level 2 [Member] | Fixed Income Securities - U.S. Corporate [Member]
Change in plan assets
Fair value of plan assets at beginning of year	[6]	86.0
Fair value of plan assets at end of year	[6]	106.0	86.0
Plan Assets [Abstract]
Fair value of plan assets by asset category	[6]	106.0	86.0			106.0	86.0
U.S. Pension Plans [Member] | Fair Value, Inputs, Level 2 [Member] | Fixed Income Securities - U.S. Government and Government Agencies [Member]
Change in plan assets
Fair value of plan assets at beginning of year	[7]	177.0
Fair value of plan assets at end of year	[7]	161.0	177.0
Plan Assets [Abstract]
Fair value of plan assets by asset category	[7]	161.0	177.0			161.0	177.0
U.S. Pension Plans [Member] | Fair Value, Inputs, Level 2 [Member] | Fixed Income Securities - Non-U.S. Government [Member]
Change in plan assets
Fair value of plan assets at beginning of year	[7]	35.0
Fair value of plan assets at end of year	[7]	18.0	35.0
Plan Assets [Abstract]
Fair value of plan assets by asset category	[7]	18.0	35.0			18.0	35.0
U.S. Pension Plans [Member] | Amount settled prior to year end [Member]
Change in plan assets
Fair value of plan assets at beginning of year	[8]	920.0
Fair value of plan assets at end of year	[8]	796.0	920.0
Plan Assets [Abstract]
Fair value of plan assets by asset category	[8]	796.0	920.0			$ 796.0	920.0
U.S. Pension Plans [Member] | Equity Securities [Member]
Plan Assets [Abstract]
Equity securities, target allocation (in hundredths)						50.00%
U.S. Pension Plans [Member] | Fixed Income Funds [Member]
Plan Assets [Abstract]
Equity securities, target allocation (in hundredths)						50.00%
Other pension (income) expense [Member] | U.S. Pension Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Pension data adjustment		0.0	22.0	[9]	0.0
Other Postretirement Benefits Plan [Member]
Benefit Payments [Abstract]
2016						$ 4.0
2017						4.0
2018						4.0
2019						4.0
2020						4.0
2021 - 2025						16.0
Amounts recognized as a loss in Accumulated Other Comprehensive Income:
Actuarial net gain						(13.0)	(8.0)
Accumulated benefit obligation						$ 45.0	$ 55.0
Components of net periodic benefit cost:
Net periodic benefit cost		$ 2.0	$ 2.0		$ 3.0

[1] Prior service costs are amortized on a straight-line basis over the average remaining service period of employees expected to receive benefits.

[2] Reflects a weighted average due to interim re-measurements in 2017.

[3] Settlement losses result when benefit payments exceed the sum of the service cost and interest cost within a plan during the year. These losses were recorded in Other pension (income) expense.

[4] Short-term investments in money market funds.

[5] Securities held in common trusts.

[6] Investments held directly by the Plan.

[7] Includes securities held in common trusts and investments held directly by the Plan.

[8] 2018 and 2017 exclude net unsettled trade payables of $41 million and $56 million, respectively.

[9] 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.