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Income Taxes - Reconciliation of Unrecognized Tax Benefits (Detail) - USD ($) $ in Millions | 12 Months Ended
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Dec. 29, 2018 | Dec. 30, 2017 | Dec. 31, 2016
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward] |  |  |
Unrecognized tax benefits at beginning of year | $ 7.7 | $ 9.4 | $ 7.2
Gross increases – tax positions in prior periods | 1.3 | 1.4 | 2.5
Gross decreases – tax positions in prior periods | (0.1) | 0.0 | (0.3)
Gross increases – tax positions in the current period | 2.8 | 1.0 | 0.5
Settlements with taxing authorities | 0.0 | (3.6) | 0.0
Lapsing of statutes of limitations | (0.6) | (0.5) | (0.5)
Unrecognized tax benefits at end of year | $ 11.1 | $ 7.7 | $ 9.4

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- Definition A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period. + References No definition available. + Details
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- Definition Amount of unrecognized tax benefits. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 45 -Paragraph 10B -URI http://asc.fasb.org/extlink&oid=84176650&loc=SL37586934-109318 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 15A -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=84230637&loc=SL6600010-109319 + Details
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