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Income Taxes (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended | 9 Months Ended |
--- | --- | --- | --- | ---
Mar. 31, 2018 | Apr. 01, 2017 | Dec. 30, 2017 | Mar. 31, 2018 | Apr. 01, 2017 | Jul. 01, 2017
Income Tax Disclosure [Abstract] |  |  |  |  |  |
Income tax expense (benefit) | $ 1.1 | $ 4.3 |  | $ 2.2 | $ 15.8 |
Tax benefit related to income tax intraperiod tax allocation | 4.0 |  |  | 7.1 |  |
Tax benefit resulting from Tax Cuts and Jobs Act |  |  |  | 6.5 |  |
Change in tax rate, deferred tax asset, tax benefit |  |  | $ 4.5 | 4.5 |  |
Change in tax rate, deferred tax liability, tax benefit |  |  | $ 2.0 | 2.0 |  |
Unrecognized tax benefits | 39.8 |  |  | 39.8 |  | $ 38.9
Interest and penalties accrued | 2.2 |  |  | 2.2 |  |
Unrecognized tax benefits that may be recognized during the next twelve months | $ 0.6 |  |  | $ 0.6 |  |

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- Definition Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 9 -Subparagraph (a),(b) -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32639-109319 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(h)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 + Details
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- Definition Amount of income tax expense (benefit) for continuing operations, discontinued operations, other comprehensive income, and items charged (credited) directly to shareholders' equity. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 20 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=79507043&loc=d3e38679-109324 + Details
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- Definition The amount of the unrecognized tax benefit of a position taken for which it is reasonably possible that the total amount thereof will significantly increase or decrease within twelve months of the balance sheet date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 15 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32718-109319 + Details
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- Definition Amount of unrecognized tax benefits. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -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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