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Leases - Future Minimum Lease Payments, Lessor Operating Leases, and Lease Guarantees (Details) $ in Millions | 3 Months Ended
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Mar. 29, 2020 USD ($) lease restaurant | Mar. 31, 2019 USD ($)
Leases |  |
sublease income | $ 2.5 | $ 2.3
Number of domestic leases for which the Company is contingently liable | lease | 113 |
Estimated maximum amount of undiscounted payments in the event of nonpayment by primary lessees | $ 17.9 |
United Kingdom franchise-owned restaurants |  |
Leases |  |
Number of units leased and subleased | restaurant | 370 |
Initial lease terms on franchised sites | 15 years |

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- Definition The number of leases for which the Company is contingently liable. + References No definition available. + Details
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- Definition Term of lessor's operating lease, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 30 -Section 50 -Paragraph 3 -Subparagraph (a)(3) -URI http://asc.fasb.org/extlink&oid=119202524&loc=SL77919359-209981 + Details
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- Definition Amount of sublease income excluding finance and operating lease expense. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 50 -Paragraph 4 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=77888426&loc=SL77918686-209980 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 55 -Paragraph 53 -URI http://asc.fasb.org/extlink&oid=77888399&loc=SL77918982-209971 + Details
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