Business Combinations (Narrative) (Details) (USD $)	12 Months Ended			0 Months Ended		6 Months Ended					0 Months Ended			6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2012	Oct. 31, 2013 Enterasys Networks, Inc.	Oct. 31, 2013 Enterasys Networks, Inc.	Jun. 30, 2014 Enterasys Networks, Inc.	Jun. 30, 2014 Enterasys Networks, Inc. Goodwill	Jun. 30, 2014 Enterasys Networks, Inc. Property, Plant and Equipment	Jun. 30, 2014 Enterasys Networks, Inc. Other Current Liabilities	Jun. 30, 2014 Enterasys Networks, Inc. Other Noncurrent Liabilities	Dec. 31, 2013 Enterasys Networks, Inc. Order Backlog	Oct. 31, 2013 Enterasys Networks, Inc. Order Backlog	Mar. 31, 2014 Enterasys Networks, Inc. In Process Research and Development	Jun. 30, 2014 Acquisition and Integration Costs Enterasys Networks, Inc.
Business Acquisition [Line Items]
Purchase price paid in acquisition	$ 180,000,000	$ 0	$ 0		$ 180,000,000
Decrease in receivables						2,428,000
Increase in goodwill						2,400,000
Decrease in current assets						1,514,000
Increase (decrease) in property and equipment						(1,829,000)	3,000,000	1,200,000	200,000	1,000,000
Estimated useful life				3 years							1 year 6 months	1 year
Increase in fair value of current liabilities						5,400,000
Increase in fair value of accrued liabilities						500,000
Fair value of indefinite lived intangibles													3,000,000
Increase in revenue						227,700,000
Increase in operating income						13,500,000
Business Combination, Separately Recognized Transactions, Additional Disclosures, Acquisition Cost Expensed														$ 6,000,000