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Accumuated Other Comprehensive Income Accumulated Other Comprehensive Income (Detail) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended |  |  |  |
--- | --- | --- | --- | --- | --- | ---
Mar. 26, 2016 | Mar. 28, 2015 | Mar. 26, 2016 | Mar. 28, 2015 | Dec. 26, 2015 | Sep. 26, 2015 | Dec. 27, 2014 | Sep. 27, 2014
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |  |  |  |  |  |  |
Changes in foreign currency translation adjustment | $ (1.2) | $ (9.5) | $ (5.4) | $ (18.5) |  |  |  |
Changes in unrealized holding gains and losses on available-for-sale securities: | (0.6) | (8.3) | (1.2) | (3.2) |  |  |  |
Other Comprehensive (Income) Loss, Pension and Other Postretirement Benefit Plans, Adjustment, Net of Tax, Portion Attributable to Parent | 0.0 | 0.0 | 0.0 | (0.1) |  |  |  |
Changes in value of hedged interest rate caps, net of tax of $1.4 and $1.2 for the three and six months ended March 26, 2016 and $0.9 for the three and six months ended March 28, 2015: | (2.2) | (1.6) | (1.9) | (1.6) |  |  |  |
Other Comprehensive Income (Loss) before Reclassifications, Tax | (4.0) | (19.4) | (8.5) | (23.2) |  |  |  |
Restructuring Reserve, Translation and Other Adjustment | 0.7 | 0.0 | (6.2) | 0.0 |  |  |  |
Accumulated other comprehensive loss | (29.2) | (20.6) | (29.2) | (20.6) | $ (25.9) | $ (14.5) | $ (1.2) | $ 2.6
Foreign Currency Translation |  |  |  |  |  |  |  |
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |  |  |  |  |  |  |
Changes in foreign currency translation adjustment | (1.2) | (9.5) | (5.4) | (18.5) |  |  |  |
Restructuring Reserve, Translation and Other Adjustment | 0.0 | 0.0 | 0.0 | 0.0 |  |  |  |
Accumulated other comprehensive loss | (21.1) | (23.2) | (21.1) | (23.2) | (19.9) | (15.7) | (13.7) | (4.7)
Equity securities |  |  |  |  |  |  |  |
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |  |  |  |  |  |  |
Changes in unrealized holding gains and losses on available-for-sale securities: | (0.6) | (8.3) | (1.2) | (3.2) |  |  |  |
Restructuring Reserve, Translation and Other Adjustment | 0.0 | 0.0 | (7.2) | 0.0 |  |  |  |
Accumulated other comprehensive loss | (1.5) | 5.7 | (1.5) | 5.7 | (0.9) | 6.9 | 14.0 | 8.9
Pension in Accumulated Other Comprehensive Income [Member] |  |  |  |  |  |  |  |
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |  |  |  |  |  |  |
Other Comprehensive (Income) Loss, Pension and Other Postretirement Benefit Plans, Adjustment, Net of Tax, Portion Attributable to Parent | 0.0 |  | 0.0 | (0.1) |  |  |  |
Restructuring Reserve, Translation and Other Adjustment | 0.0 | 0.0 | 0.0 | 0.0 |  |  |  |
Accumulated other comprehensive loss | (1.8) | (1.5) | (1.8) | (1.5) | (1.8) | (1.8) | (1.5) | (1.6)
Interest rate cap - derivative |  |  |  |  |  |  |  |
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |  |  |  |  |  |  |
Changes in value of hedged interest rate caps, net of tax of $1.4 and $1.2 for the three and six months ended March 26, 2016 and $0.9 for the three and six months ended March 28, 2015: | (2.2) | (1.6) | (1.9) | (1.6) |  |  |  |
Restructuring Reserve, Translation and Other Adjustment | 0.7 | 0.0 | 1.0 | 0.0 |  |  |  |
Accumulated other comprehensive loss | $ (4.8) | $ (1.6) | $ (4.8) | $ (1.6) | $ (3.3) | $ (3.9) | $ 0.0 | $ 0.0

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- Definition Accumulated change in equity from transactions and other events and circumstances from non-owner sources, net of tax effect, at period end. Excludes Net Income (Loss), and accumulated changes in equity from transactions resulting from investments by owners and distributions to owners. Includes foreign currency translation items, certain pension adjustments, unrealized gains and losses on certain investments in debt and equity securities, other than temporary impairment (OTTI) losses related to factors other than credit losses on available-for-sale and held-to-maturity debt securities that an entity does not intend to sell and it is not more likely than not that the entity will be required to sell before recovery of the amortized cost basis, as well as changes in the fair value of derivatives related to the effective portion of a designated cash flow hedge. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=36458714&loc=d3e637-108580 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 14 -URI http://asc.fasb.org/extlink&oid=36458714&loc=d3e681-108580 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 14A -URI http://asc.fasb.org/extlink&oid=36458714&loc=SL7669686-108580 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 31 -Article 5 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Article 3 + Details
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- Definition The effective portion of gains and losses (net) on derivative instruments designated and qualifying as hedging instruments that was recognized in other comprehensive income during the current period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4C -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=56946850&loc=SL5624171-113959 + Details
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- Definition Amount after tax and reclassification adjustments of gain (loss) on foreign currency translation adjustments, foreign currency transactions designated and effective as economic hedges of a net investment in a foreign entity and intra-entity foreign currency transactions that are of a long-term-investment nature, attributable to parent entity. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 50 -Paragraph 1A -Subparagraph (c)(3) -URI http://asc.fasb.org/extlink&oid=18733093&loc=SL4573702-111684 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 45 -Paragraph 20 -URI http://asc.fasb.org/extlink&oid=51664549&loc=SL4569643-111683 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 45 -Paragraph 19 -URI http://asc.fasb.org/extlink&oid=51664549&loc=SL4569616-111683 + Details
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- Definition Amount after tax and reclassification adjustments, of appreciation (loss) in value of unsold available-for-sale securities. Excludes amounts related to other than temporary impairment (OTTI) loss. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 10A -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=36458714&loc=SL7669646-108580 + Details
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