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Summary of Significant Accounting Policies - Narrative (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 29, 2019 | Dec. 30, 2018 | Dec. 31, 2017
Accounting Policies [Abstract] |  |  |
Fiscal period duration | 364 days | 364 days | 364 days
Advertising expense | $ 9.4 | $ 8.7 | $ 7.9
Short-term Debt [Line Items] |  |  |
Accounts payable | 503.6 | 540.6 |
Accrued payroll and related taxes | 267.6 | 266.0 |
Liability for claims | 1.0 |  |
Book overdrafts |  |  |
Short-term Debt [Line Items] |  |  |
Accounts payable | 5.9 | 7.3 |
Accrued payroll and related taxes | $ 21.9 | $ 22.9 |
PersolKelly Asia Pacific |  |  |
Short-term Debt [Line Items] |  |  |
Equity method investment, ownership percentage | 49.00% |  |

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- Definition Sum of the carrying values as of the balance sheet date of obligations incurred through that date and due within one year (or the operating cycle, if longer), including liabilities incurred (and for which invoices have typically been received) and payable to vendors for goods and services received, taxes, interest, rent and utilities, accrued salaries and bonuses, payroll taxes and fringe benefits. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.19,20) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Definition Total of the carrying values as of the balance sheet date of obligations incurred through that date and payable for obligations related to services received from employees, such as accrued salaries and bonuses, payroll taxes and fringe benefits. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.20) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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