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Fair Value Measurements (Tables) | 12 Months Ended
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Dec. 30, 2018
Fair Value Disclosures [Abstract] |
Fair Value Measurements on a Recurring Basis | The following tables present assets measured at fair value on a recurring basis as of year-end 2018 and 2017 in the consolidated balance sheet by fair value hierarchy level, as described below. Level 1 measurements consist of unadjusted quoted prices in active markets for identical assets or liabilities. Level 2 measurements include quoted prices in markets that are not active or model inputs that are observable either directly or indirectly for substantially the full term of the asset or liability. Level 3 measurements include significant unobservable inputs.
|  | Fair Value Measurements on a Recurring Basis As of Year-End 2018
Description |  | Total |  | Level 1 |  | Level 2 |  | Level 3
|  | (In millions of dollars)
Money market funds |  | $ | 4.6 |  |  | $ | 4.6 |  |  | $ | — |  |  | $ | — |
Investment in Persol Holdings |  | 135.1 |  |  | 135.1 |  |  | — |  |  | — |
Total assets at fair value |  | $ | 139.7 |  |  | $ | 139.7 |  |  | $ | — |  |  | $ | — |
|  | Fair Value Measurements on a Recurring Basis As of Year-End 2017
Description |  | Total |  | Level 1 |  | Level 2 |  | Level 3
|  | (In millions of dollars)
Money market funds |  | $ | 4.3 |  |  | $ | 4.3 |  |  | $ | — |  |  | $ | — |
Investment in Persol Holdings |  | 228.1 |  |  | 228.1 |  |  | — |  |  | — |
Total assets at fair value |  | $ | 232.4 |  |  | $ | 232.4 |  |  | $ | — |  |  | $ | — |

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- Definition Tabular disclosure of assets, including [financial] instruments measured at fair value that are classified in stockholders' equity, if any, by class that are measured at fair value on a recurring basis. The disclosures contemplated herein include the fair value measurements at the reporting date by the level within the fair value hierarchy in which the fair value measurements in their entirety fall, segregating fair value measurements using quoted prices in active markets for identical assets (Level 1), significant other observable inputs (Level 2), and significant unobservable inputs (Level 3). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=99377789&loc=d3e19207-110258 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=99377789&loc=d3e19190-110258 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=99377789&loc=d3e19207-110258 + Details
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