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Description of Business and Summary of Significant Accounting Policies (Details 2) - USD ($) $ in Millions | 3 Months Ended | 4 Months Ended | 12 Months Ended
--- | --- | --- | ---
Dec. 30, 2018 | Oct. 07, 2018 | Jul. 15, 2018 | Dec. 31, 2017 | Oct. 01, 2017 | Jul. 09, 2017 | Apr. 22, 2018 | Apr. 16, 2017 | Dec. 30, 2018 | Dec. 31, 2017 | Dec. 25, 2016
Description of business and summary of significant accounting policies |  |  |  |  |  |  |  |  |  |  |
Duration of fiscal period | 84 days | 84 days | 84 days | 91 days | 84 days | 84 days | 112 days | 112 days | 364 days | 371 days | 364 days
Length of next fiscal year |  |  |  |  |  |  |  |  | 364 days |  |
Accounts Receivable |  |  |  |  |  |  |  |  |  |  |
Gift cards in transit in accounts receivable | $ 13.8 |  |  | $ 14.3 |  |  |  |  | $ 13.8 | $ 14.3 |
Tenant improvement allowances | 2.4 |  |  | 2.2 |  |  |  |  | 2.4 | 2.2 |
Inventories |  |  |  |  |  |  |  |  |  |  |
Food and beverage inventories | 8.7 |  |  | 9.0 |  |  |  |  | 8.7 | 9.0 |
Supplies inventories | $ 18.6 |  |  | $ 20.6 |  |  |  |  | $ 18.6 | $ 20.6 |
Minimum |  |  |  |  |  |  |  |  |  |  |
Description of business and summary of significant accounting policies |  |  |  |  |  |  |  |  |  |  |
Duration of fiscal period |  |  |  |  |  |  |  |  | 364 days |  |
Cash Equivalents |  |  |  |  |  |  |  |  |  |  |
Period for conversion of amounts receivable from credit card issuers into cash |  |  |  |  |  |  |  |  | 2 days |  |
Maximum |  |  |  |  |  |  |  |  |  |  |
Description of business and summary of significant accounting policies |  |  |  |  |  |  |  |  |  |  |
Duration of fiscal period |  |  |  |  |  |  |  |  | 371 days |  |
Cash Equivalents |  |  |  |  |  |  |  |  |  |  |
Period for conversion of amounts receivable from credit card issuers into cash |  |  |  |  |  |  |  |  | 4 days |  |

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