Pension, Retiree Medical and Retiree Savings Plans (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Defined Benefit Plan Disclosure [Line Items]
Contributions to defined benefit pension plans		$ (6.0)	$ (15.0)	$ (16.0)
Components of net periodic benefit cost:
Amortization of prior service cost		4.0	5.0
Amortization of net loss		(14.0)	(2.0)
Pension losses in accumulated other comprehensive income (loss):
Unrealized gains (losses) arising during the year		$ (8.0)	(39.0)	32.0
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		$ 10.0	11.0	12.0
Pension settlement charges		(4.0)	(3.0)
Foreign Pension Plan [Member]
Change in benefit obligation
Benefit obligation at beginning of year		290.0
Benefit obligation at end of year		362.0	290.0
Change in plan assets
Fair value of plan assets at beginning of year		372.0
Fair value of plan assets at end of year		440.0	372.0
Amounts recognized as a loss in Accumulated Other Comprehensive Income:
Actuarial net gain					$ (18.0)	$ (25.0)
Components of net periodic benefit cost:
Net periodic benefit cost		1.0	2.0	4.0
Plan Assets [Abstract]
Fair value of plan assets by asset category		372.0	372.0		440.0	372.0
Foreign Pension Plan [Member] | Fair Value, Inputs, Level 1 [Member] | Equity Securities - Non US [Member]
Change in plan assets
Fair value of plan assets at beginning of year	[1]	88.0
Fair value of plan assets at end of year	[1]	102.0	88.0
Plan Assets [Abstract]
Fair value of plan assets by asset category	[1]	88.0	88.0		102.0	88.0
United States
Defined Benefit Plan Disclosure [Line Items]
Net Payable For Unsettled Transactions					212.0	169.0
Defined Benefit Plan, Benefit Obligation, Benefits Paid		(46.0)	(57.0)
Change in benefit obligation
Benefit obligation at beginning of year		1,015.0	873.0
Service cost		8.0	6.0	8.0
Interest cost		35.0	39.0	38.0
Plan amendments		1.0	2.0
Special termination benefits		2.0	0.0	1.0
Settlement payments		0.0	1.0
Actuarial (gain) loss		118.0	153.0
Benefit obligation at end of year		1,133.0	1,015.0	873.0
Change in plan assets
Fair value of plan assets at beginning of year		886.0	755.0
Actual return on plan assets		168.0	176.0
Employer contributions		6.0	12.0
Fair value of plan assets at end of year		1,014.0	886.0	755.0
Defined Benefit Plan, Plan Assets, Benefits Paid		(46.0)	(57.0)
Funded status at end of year					(119.0)	(129.0)
Benefit Payments [Abstract]
2016					54.0
2017					52.0
2018					53.0
2019					55.0
2020					58.0
2021 - 2025					299.0
Amounts recognized in the Consolidated Balance Sheet:
Accrued benefit liability - current					(9.0)	(4.0)
Accrued benefit liability - non-current					(110.0)	(125.0)
Accrued benefit amounts recognized					(119.0)	(129.0)
Amounts recognized as a loss in Accumulated Other Comprehensive Income:
Actuarial net gain					96.0	118.0
Prior service cost					(15.0)	(18.0)
Amounts recognized as a loss in Accumulated Other Comprehensive Income		(111.0)	(136.0)	(123.0)	(111.0)	(136.0)	$ (123.0)
Accumulated benefit obligation					$ 1,111.0	$ 984.0
Components of net periodic benefit cost:
Service cost		8.0	6.0	8.0
Interest cost		35.0	39.0	38.0
Amortization of prior service cost	[2]	5.0	6.0	5.0
Expected return on plan assets		(43.0)	(44.0)	(44.0)
Amortization of net loss		(14.0)	(1.0)	(16.0)
Net periodic benefit cost		19.0	8.0	23.0
Additional loss recognized due to:
Special termination benefits		2.0	0.0	1.0
Pension losses in accumulated other comprehensive income (loss):
Beginning of year		(136.0)	(123.0)
Unrealized gains (losses) arising during the year		7.0	(22.0)
Other Comprehensive Income (Loss),Defined Benefit Plans, Curtailment Gain (Loss), before Tax		1.0	0.0
Curtailment gain		0.0	4.0
Amortization of net loss		14.0	1.0
Amortization of prior service cost		5.0	6.0
Prior service cost		(2.0)	(2.0)
End of year		$ (111.0)	$ (136.0)	$ (123.0)
Weighted-average assumptions used to determine benefit obligations at the measurement dates:
Discount rate (in hundredths)					2.80%	3.50%	4.60%
Rate of compensation increase (in hundredths)					3.00%	3.00%
Weighted-average assumptions used to determine the net periodic benefit cost for fiscal years:
Discount rate (in hundredths)		3.50%	4.60%	3.90%
Long-term rate return on plan assets (in hundredths)		5.50%	5.75%	5.65%
Rate of compensation increase (in hundredths)		3.00%	3.00%	3.75%
Plan Assets [Abstract]
Fair value of plan assets by asset category		$ 1,014.0	$ 755.0	$ 755.0	$ 1,014.0	$ 886.0	$ 755.0
Equity securities, target allocation (in hundredths)					50.00%
Approximate percentage of total plan assets in investment that includes YUM stock (in hundredths)		1.00%
Effect of one-percentage point change in assumed health care cost trend rates [Abstract]
Pension settlement charges	[3]	$ 0.0	(3.0)	0.0
Projected benefit obligation					$ 1,133.0	1,015.0
Accumulated benefit obligation					1,111.0	984.0
Accumulated benefit obligation					1,111.0	984.0
Defined Benefit Plan, Pension Plan with Projected Benefit Obligation in Excess of Plan Assets, Plan Assets					1,014.0	886.0
Fair value of plan assets					1,014.0	886.0
Defined Benefit Plan, Pension Plan with Projected Benefit Obligation in Excess of Plan Assets, Projected Benefit Obligation					1,133.0	1,015.0
United States | Defined Benefit Plan, Equity Securities, Common Stock [Member]
Plan Assets [Abstract]
Value of mutual fund held as an investment that includes YUM stock					0.3
United States | Fair Value, Inputs, Level 1 [Member] | Cash [Member]
Change in plan assets
Fair value of plan assets at beginning of year		5.0
Fair value of plan assets at end of year		9.0	5.0
Plan Assets [Abstract]
Fair value of plan assets by asset category		5.0	5.0		9.0	5.0
United States | Fair Value, Inputs, Level 1 [Member] | Cash Equivalents [Member]
Change in plan assets
Fair value of plan assets at beginning of year	[4]	13.0
Fair value of plan assets at end of year	[4]	10.0	13.0
Plan Assets [Abstract]
Fair value of plan assets by asset category	[4]	13.0	13.0		10.0	13.0
United States | Fair Value, Inputs, Level 1 [Member] | Equity Securities - US Large cap [Member]
Change in plan assets
Fair value of plan assets at beginning of year	[1]	268.0
Fair value of plan assets at end of year	[1]	306.0	268.0
Plan Assets [Abstract]
Fair value of plan assets by asset category	[1]	268.0	268.0		306.0	268.0
United States | Fair Value, Inputs, Level 1 [Member] | Debt Security, Corporate, US [Member]
Change in plan assets
Fair value of plan assets at beginning of year	[1]	161.0
Fair value of plan assets at end of year	[1]	164.0	161.0
Plan Assets [Abstract]
Fair value of plan assets by asset category	[1]	161.0	161.0		164.0	161.0
United States | Fair Value, Inputs, Level 1 [Member] | Equity Securities - US Mid cap [Member]
Change in plan assets
Fair value of plan assets at beginning of year	[1]	44.0
Fair value of plan assets at end of year	[1]	51.0	44.0
Plan Assets [Abstract]
Fair value of plan assets by asset category	[1]	44.0	44.0		51.0	44.0
United States | Fair Value, Inputs, Level 1 [Member] | Equity Securities - US Small cap [Member]
Change in plan assets
Fair value of plan assets at beginning of year	[1]	43.0
Fair value of plan assets at end of year	[1]	52.0	43.0
Plan Assets [Abstract]
Fair value of plan assets by asset category	[1]	43.0	43.0		52.0	43.0
United States | Fair Value, Inputs, Level 2 [Member] | Debt Security, Corporate, US [Member]
Change in plan assets
Fair value of plan assets at beginning of year	[5]	120.0
Fair value of plan assets at end of year	[5]	148.0	120.0
Plan Assets [Abstract]
Fair value of plan assets by asset category	[5]	120.0	120.0		148.0	120.0
United States | Fair Value, Inputs, Level 2 [Member] | US Treasury and Government [Member]
Change in plan assets
Fair value of plan assets at beginning of year	[6]	274.0
Fair value of plan assets at end of year	[6]	354.0	274.0
Plan Assets [Abstract]
Fair value of plan assets by asset category	[6]	274.0	274.0		354.0	274.0
United States | Fair Value, Inputs, Level 2 [Member] | Fixed Income Securities [Member]
Change in plan assets
Fair value of plan assets at beginning of year	[6]	39.0
Fair value of plan assets at end of year	[6]	30.0	39.0
Plan Assets [Abstract]
Fair value of plan assets by asset category	[6]	39.0	39.0		30.0	39.0
United States | Fair Value, Inputs, Level 1, 2 and 3
Change in plan assets
Fair value of plan assets at beginning of year	[7]	1,055.0
Fair value of plan assets at end of year	[7]	1,226.0	1,055.0
Plan Assets [Abstract]
Fair value of plan assets by asset category	[7]	1,055.0	1,055.0		1,226.0	1,055.0
Other Postretirement Benefits Plan [Member]
Benefit Payments [Abstract]
2016					4.0
2021 - 2025					14.0
Amounts recognized as a loss in Accumulated Other Comprehensive Income:
Actuarial net gain					(4.0)	(9.0)
Accumulated benefit obligation					$ 46.0	$ 44.0
Components of net periodic benefit cost:
Net periodic benefit cost		$ 1.0	$ 1.0	$ 2.0

[1] Securities held in common trusts.

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

[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] Investments held directly by the Plan.

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

[7] 2020 and 2019 exclude net unsettled trade payables of $212 million and $169 million, respectively.