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Leases (Details) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2017 USD ($) Years | Dec. 31, 2016 USD ($) | Dec. 31, 2015 USD ($)
Leases [Abstract] |  |  |
Approximate number of restaurants operated | 1,481 |  |
Approximate number of restaurants operated on leased land and/or buildings | 900 |  |
Maximum duration of lease commitments from inception for the vast majority of our lease commitments (in years) | Years | 20 |  |
Capital leases, future minimum commitments [Abstract] |  |  |
2016 | $ 13 |  |
2017 | 13 |  |
2018 | 12 |  |
2019 | 11 |  |
2020 | 11 |  |
Thereafter | 76 |  |
Capital leases, total future minimum commitments | 136 |  |
Operating leases, future minimum commitments [Abstract] |  |  |
2016 | 124 |  |
2017 | 111 |  |
2018 | 87 |  |
2019 | 75 |  |
2020 | 67 |  |
Thereafter | 435 |  |
Operating leases, total future minimum commitments | 899 |  |
Direct financing leases, lease receivables [Abstract] |  |  |
2016 | 5 |  |
2017 | 4 |  |
2018 | 4 |  |
2019 | 3 |  |
2020 | 3 |  |
Thereafter | 24 |  |
Direct financing leases, total lease receivables | 43 |  |
Operating leases, lease receivables [Abstract] |  |  |
2016 | 64 |  |
2017 | 58 |  |
2018 | 51 |  |
2019 | 47 |  |
2020 | 44 |  |
Thereafter | 415 |  |
Operating leases, total lease receivables | 679 |  |
Present value of minimum payments under capital leases | 105 | $ 120 |
Unearned income associated with direct financing lease receivables | 12 |  |
Rental expense |  |  |
Minimum | 193 | 208 | $ 225
Contingent | 21 | 26 | 29
Total rental expense | 214 | 234 | 254
Rental income | $ 86 | $ 73 | $ 73
Approximate number of units leased or subleased to franchisees | 900 |  |

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- Definition Amount of minimum lease payments for capital leases due in the next fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=84164817&loc=d3e45280-112737 + Details
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- Definition The remaining (unamortized) difference between the gross investment in a direct financing lease and the cost or carrying amount, if different, of the leased property as of the balance sheet date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 30 -Section 50 -Paragraph 4 -Subparagraph (a)(4) -URI http://asc.fasb.org/extlink&oid=84165051&loc=d3e45377-112738 + Details
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- Definition The increases or decreases in lease payments that result from changes occurring after the inception of the lease in the factors (other than the passage of time) on which lease payments are based, except that any escalation of minimum lease payments relating to increases in construction or acquisition cost of the leased property or for increases in some measure of cost or value during the construction or preconstruction period, are excluded from contingent rentals. Contingent rentals also may include amounts for which the triggering events have not yet occurred or the specified targets for which have not yet been achieved (such as sales based percentage rent), but which events are considered probable of occurring or which specified targets are considered probable of being achieved. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=77902758&loc=d3e41499-112717 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 10 -Section 55 -Paragraph 40 -Subparagraph (Note 3) -URI http://asc.fasb.org/extlink&oid=82846649&loc=d3e38371-112697 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 10 -Section 40 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=77895616&loc=d3e36728-112689 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 10 -Section 25 -Paragraph 35 -URI http://asc.fasb.org/extlink&oid=77910666&loc=d3e35050-112683 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=84164451&loc=d3e36991-112694 + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition This element represents the payments that the lessee is obligated to make or can be required to make in connection with a property under the terms of an agreement classified as an operating lease, excluding contingent rentals and a guarantee by the lessee of the lessor's debt and the lessee's obligation to pay (apart from the rental payments) executory costs such as insurance, maintenance, and taxes. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=77902758&loc=d3e41499-112717 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 10 -Section 25 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=77910348&loc=d3e34039-112682 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 10 -Section 55 -Paragraph 40 -Subparagraph (Note 3) -URI http://asc.fasb.org/extlink&oid=82846649&loc=d3e38371-112697 + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition Approximate number of restaurants operated on leased land and/or buildings. + References No definition available. + Details
Name: | yum_ApproximateNumberOfRestaurantsOperatedOnLeasedLandAndOrBuildings
Namespace Prefix: | yum_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Definition Approximate number of units leased or subleased to franchisees + References No definition available. + Details
Name: | yum_Approximatenumberofunitsleasedorsubleasedtofranchisees
Namespace Prefix: | yum_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Definition Maximum Duration Of Lease Commitments From Inception + References No definition available. + Details
Name: | yum_MaximumDurationOfLeaseCommitmentsFromInception
Namespace Prefix: | yum_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Definition Number of Restaurants Operated + References No definition available. + Details
Name: | yum_NumberofRestaurantsOperated
Namespace Prefix: | yum_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant