Revenue Recognition (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2018	Dec. 31, 2017
Disaggregation of Revenue [Line Items]
Revenues	$ 1,046,021	$ 1,032,212	$ 2,018,921	$ 1,956,771
Technology Solutions [Member]
Disaggregation of Revenue [Line Items]
Revenues	1,032,466	1,021,858	1,992,354	1,936,667
Master Agency and Professional Services [Member]
Disaggregation of Revenue [Line Items]
Revenues	13,555	10,354	26,567	20,104
Worldwide Barcode, Networking & Security Segment [Member]
Disaggregation of Revenue [Line Items]
Revenues	701,639	719,786	1,356,752	1,340,114
Worldwide Barcode, Networking & Security Segment [Member] | Technology Solutions [Member]
Disaggregation of Revenue [Line Items]
Revenues	701,639	719,786	1,356,752	1,340,114
Worldwide Barcode, Networking & Security Segment [Member] | Master Agency and Professional Services [Member]
Disaggregation of Revenue [Line Items]
Revenues	0	0	0	0
Worldwide Communications & Services Segment [Member]
Disaggregation of Revenue [Line Items]
Revenues	344,382	312,426	662,169	616,657
Worldwide Communications & Services Segment [Member] | Technology Solutions [Member]
Disaggregation of Revenue [Line Items]
Revenues	330,827	302,072	635,602	596,553
Worldwide Communications & Services Segment [Member] | Master Agency and Professional Services [Member]
Disaggregation of Revenue [Line Items]
Revenues	$ 13,555	$ 10,354	$ 26,567	$ 20,104