Summary of Significant Accounting Policies (Narratives) (Details)		3 Months Ended		12 Months Ended
	Jul. 14, 2017 USD ($)	Sep. 30, 2017 USD ($)	Dec. 31, 2016 USD ($)	Jun. 30, 2017 USD ($) Distribution_Channels	Jun. 30, 2016 USD ($)	Jun. 30, 2015 USD ($)	Oct. 28, 2016 USD ($)
Significant Accounting Policies [Line Items]
Number of distribution channels | Distribution_Channels				2
Maximum investment in one obligor or maker (percent)				10.00%
Available-for sale investments in debt securities				$ 0	$ 0
Transfers of assets between Level 1 and Level 2				0	0
Transfers of Liabilities between Level 1 and Level 2				0	0
Fair value of derivative instruments under foreign currency contracts				27,000
Long-term debt, estimated fair value				93,700,000	55,500,000
Purchases of non-marketable equity investment						$ 3,000,000
Transfers of assets between Level 2 and Level 3				0	0
Transfers of liabilities between Level 2 and Level 3				0	0
Intangible asset and goodwill impairment				0	0
Inventory, net				45,880,000	40,989,000
Depreciation expense recognized related to property and equipment				10,618,000	10,802,000	12,832,000
Goodwill acquired in period				9,339,000
Service parts held to support customers				10,100,000	16,000,000
Borrowings under Term Loan				48,250,000
Deferred financing costs				1,300,000
Amortization of deferred financing costs				500,000	500,000	400,000
Outstanding letters of credit				$ 900,000	900,000
Standard hardware warranty period (in months)				12 months
Standard software warranty period (in days)				90 days
Limited lifetime hardware warranty maximum period after end of sale of product (in years)				5 years
Advertising expenses				$ 400,000	$ 300,000	$ 500,000
Minimum percentage of tax benefit realized upon settlement				50.00%
Revolving Loan Facility
Significant Accounting Policies [Line Items]
Borrowings available under facility				$ 39,100,000
Revolving Loan Facility | Second Amendment | Subsequent Event
Significant Accounting Policies [Line Items]
Borrowing capacity from Credit Facility, as amended	$ 60,000,000
Term Loan | Second Amendment | Subsequent Event
Significant Accounting Policies [Line Items]
Borrowing capacity from Credit Facility, as amended	183,700,000
Credit Facility
Significant Accounting Policies [Line Items]
Borrowing capacity from Credit Facility, as amended							$ 140,500,000
Credit Facility | Second Amendment | Subsequent Event
Significant Accounting Policies [Line Items]
Borrowing capacity from Credit Facility, as amended	$ 243,700,000
Zebra Technologies Corporation | Swing line loan sub facility
Significant Accounting Policies [Line Items]
Borrowing capacity from Credit Facility, as amended			$ 5,000,000
Zebra Technologies Corporation | Revolving Loan Facility
Significant Accounting Policies [Line Items]
Borrowing capacity from Credit Facility, as amended			$ 50,000,000
Credit Facility, as amended term			5 years
Zebra Technologies Corporation | Term Loan
Significant Accounting Policies [Line Items]
Borrowing capacity from Credit Facility, as amended			$ 90,500,000
Credit Facility, as amended term			5 years
Zebra Technologies Corporation | Letter of Credit
Significant Accounting Policies [Line Items]
Borrowing capacity from Credit Facility, as amended			$ 10,000,000
Avaya Networking | Revolving Loan Facility | Subsequent Event | London Interbank Offered Rate (LIBOR)
Significant Accounting Policies [Line Items]
Interest rate, applicable margin	3.25%
Avaya Networking | Revolving Loan Facility | Subsequent Event | Adjusted Base Rate
Significant Accounting Policies [Line Items]
Interest rate, applicable margin	1.25%
Avaya Networking | Term Loan | Subsequent Event
Significant Accounting Policies [Line Items]
Borrowings under Term Loan	$ 80,000,000
Interest rate, floor	0.00%
Avaya Networking | Term Loan | Subsequent Event | London Interbank Offered Rate (LIBOR)
Significant Accounting Policies [Line Items]
Interest rate, applicable margin	3.25%
Avaya Networking | Term Loan | Subsequent Event | Adjusted Base Rate
Significant Accounting Policies [Line Items]
Interest rate, applicable margin	1.25%
Scenario, Forecast
Significant Accounting Policies [Line Items]
Gain on investments		$ 3,700,000
Maximum
Significant Accounting Policies [Line Items]
Extended warranty period				5 years
Maximum | Second Amendment | Subsequent Event
Significant Accounting Policies [Line Items]
Additional incremental loan facility	$ 50,000,000
Maximum | Avaya Networking | Revolving Loan Facility | Subsequent Event
Significant Accounting Policies [Line Items]
Commitment fee	0.50%
Maximum | Purchased Software
Significant Accounting Policies [Line Items]
Estimated useful lives of property and equipment				4 years
Maximum | Computer Equipment
Significant Accounting Policies [Line Items]
Estimated useful lives of property and equipment				4 years
Maximum | Office Equipment
Significant Accounting Policies [Line Items]
Estimated useful lives of property and equipment				7 years
Maximum | Leasehold Improvements
Significant Accounting Policies [Line Items]
Estimated useful lives of property and equipment				10 years
Minimum
Significant Accounting Policies [Line Items]
Extended warranty period				1 year
Minimum | Avaya Networking | Revolving Loan Facility | Subsequent Event
Significant Accounting Policies [Line Items]
Commitment fee	0.375%
Minimum | Purchased Software
Significant Accounting Policies [Line Items]
Estimated useful lives of property and equipment				1 year
Minimum | Computer Equipment
Significant Accounting Policies [Line Items]
Estimated useful lives of property and equipment				1 year
Minimum | Office Equipment
Significant Accounting Policies [Line Items]
Estimated useful lives of property and equipment				3 years
Minimum | Leasehold Improvements
Significant Accounting Policies [Line Items]
Estimated useful lives of property and equipment				2 years
Cash equivalents | Maximum
Significant Accounting Policies [Line Items]
Maturity period for investments				3 months
Short-term Investments | Maximum
Significant Accounting Policies [Line Items]
Maturity period for investments				1 year
Short-term Investments | Minimum
Significant Accounting Policies [Line Items]
Maturity period for investments				3 months