Summary Of Significant Accounting Policies - Additional Information (Detail) (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended	12 Months Ended
	Sep. 26, 2010	Dec. 30, 2012 Y	Dec. 25, 2011	Dec. 26, 2010
Summary Of Significant Accounting Policies [Line Items]
Percentage of revenue received from distributors		62.00%
Standard limited warranty period, in years		1
Increase (decrease) in depreciation expense		$ 17.2
Change in estimates effect on increase in net income		15.0
Change in estimates effect on increase in net income per share		$ 0.12
Purchase of equity investment	3.0			3.0
Cost method investments		3.7	3.7
Realized foreign currency gains (losses)		2.8	2.6	(4.0)
Minimum
Summary Of Significant Accounting Policies [Line Items]
Intangible assets, in years		1 year
Maximum
Summary Of Significant Accounting Policies [Line Items]
Intangible assets, in years		15 years
Building and Improvements | Minimum
Summary Of Significant Accounting Policies [Line Items]
Property, plant and equipment, estimated useful life, in years		10 years
Building and Improvements | Maximum
Summary Of Significant Accounting Policies [Line Items]
Property, plant and equipment, estimated useful life, in years		30 years
Machinery and Equipment and Software | Previous Policy
Summary Of Significant Accounting Policies [Line Items]
Property, plant and equipment, estimated useful life, in years		8 years
Machinery and Equipment and Software | Minimum
Summary Of Significant Accounting Policies [Line Items]
Property, plant and equipment, estimated useful life, in years		3 years
Machinery and Equipment and Software | Maximum
Summary Of Significant Accounting Policies [Line Items]
Property, plant and equipment, estimated useful life, in years		10 years
Machinery and equipment at wafer fabrication facilities | Previous Policy
Summary Of Significant Accounting Policies [Line Items]
Property, plant and equipment, estimated useful life, in years		10 years
Molds And Tooling
Summary Of Significant Accounting Policies [Line Items]
Increase (decrease) in depreciation expense		$ 0.7
Other long term assets, estimated useful life		3 years
Molds And Tooling | Minimum
Summary Of Significant Accounting Policies [Line Items]
Other long term assets, estimated useful life		1 year
Molds And Tooling | Maximum
Summary Of Significant Accounting Policies [Line Items]
Other long term assets, estimated useful life		8 years
Balance Sheet Translation Hedges
Summary Of Significant Accounting Policies [Line Items]
Duration of currency forward and combination option contracts, in months		1