Amount of loss from the write-down of an asset representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

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Reference 2: http://www.xbrl.org/2003/role/presentationRef

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Name:	us-gaap_GoodwillImpairmentLoss
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

Impairment Of Goodwill And Long-Lived Assets (Narrative) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended		3 Months Ended
	Dec. 29, 2012	Dec. 28, 2013	Sep. 30, 2012
Goodwill [Line Items]
Goodwill impairment	$ 267.6us-gaap_GoodwillImpairmentLoss
FTTH [Member]
Goodwill [Line Items]
Goodwill impairment		146.3
Wintegra, Inc. [Member]
Goodwill [Line Items]
Goodwill impairment		121.3
Intangible assets impairment			$ 7