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Revenue Recognition Accounting Policy (Details) $ in Millions	9 Months Ended
	Sep. 30, 2018 USD ($) Rate
Minimum [Member]
Continuing Fees Rate	4.00%
Maximum [Member]
Continuing Fees Rate	6.00%
Master Franchise Agreement [Member]
Continuing Fees Rate	3.00%
Foreign Currency Gain (Loss) and Refranchising Gain (Loss) [Member]
Deferred Revenue, Period Increase (Decrease) | $	$ 11	[1]
[1] Includes impact of foreign currency translation as well as the recognition of deferred franchise fees into Refranchising (gain) loss upon the modification of existing franchise agreements when entering into master franchise agreements.

X

- Definition

Amount of increase (decrease) in deferred revenue.

+ References

No definition available.

+ Details

Name:	us-gaap_DeferredRevenuePeriodIncreaseDecrease
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Continuing Fees Rate

+ References

No definition available.

+ Details

Name:	yum_ContinuingFeesRate
Namespace Prefix:	yum_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

X

- Details

Name:	srt_RangeAxis=srt_MinimumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_RangeAxis=srt_MaximumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_ProductOrServiceAxis=yum_MasterFranchiseAgreementMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_IncomeStatementLocationAxis=yum_ForeignCurrencyGainLossandRefranchisingGainLossMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: