KLA Corporation Annual report pursuant to Section 13 and 15(d)

Goodwill and Purchased Intangible Assets - Schedule of Goodwill (Details)

Goodwill and Purchased Intangible Assets - Schedule of Goodwill (Details)	12 Months Ended
	Jun. 30, 2019 USD ($) reporting_unit segment	Jun. 30, 2018 USD ($)	Jun. 30, 2017 USD ($)
Goodwill
Number of reportable segments \| segment	4
Number of reporting units \| reporting_unit	6
Goodwill
Goodwill, beginning balance	$ 354,698,000	$ 349,526,000
Acquired goodwill	1,857,167,000	5,163,000
Reallocation due to change in segments	0
Foreign currency adjustment	(7,000)	9,000
Goodwill, ending balance	2,211,858,000	354,698,000
Accumulated impairment loss	277,600,000	277,600,000	$ 277,600,000
Wafer Inspection
Goodwill
Goodwill, beginning balance	281,005,000	281,095,000
Acquired goodwill	0	0
Reallocation due to change in segments	(281,005,000)
Foreign currency adjustment		(90,000)
Goodwill, ending balance	0	281,005,000
Accumulated impairment loss		1,000,000	1,000,000
Patterning
Goodwill
Goodwill, beginning balance	53,255,000	53,255,000
Acquired goodwill	26,362,000	0
Reallocation due to change in segments	(79,617,000)
Foreign currency adjustment	0	0
Goodwill, ending balance	0	53,255,000
Accumulated impairment loss		276,600,000	$ 276,600,000
GSS
Goodwill
Goodwill, beginning balance	8,039,000	2,856,000
Acquired goodwill	17,869,000	5,163,000
Reallocation due to change in segments	0
Foreign currency adjustment	0	20,000
Goodwill, ending balance	25,908,000	8,039,000
SPC Others
Goodwill
Goodwill, beginning balance	12,399,000	12,320,000
Acquired goodwill	1,176,000	0
Reallocation due to change in segments	(13,575,000)
Foreign currency adjustment	0	79,000
Goodwill, ending balance	0	12,399,000
Wafer Inspection and Patterning
Goodwill
Goodwill, beginning balance	0	0
Acquired goodwill	0	0
Reallocation due to change in segments	360,622,000
Foreign currency adjustment	(7,000)	0
Goodwill, ending balance	360,615,000	0
Specialty Semiconductor Process
Goodwill
Goodwill, beginning balance	0	0
Acquired goodwill	821,842,000	0
Reallocation due to change in segments	0
Foreign currency adjustment	0	0
Goodwill, ending balance	821,842,000	0
PCB and Display
Goodwill
Goodwill, beginning balance	0	0
Acquired goodwill	989,918,000	0
Reallocation due to change in segments	0
Foreign currency adjustment	0	0
Goodwill, ending balance	989,918,000	0
Component Inspection
Goodwill
Goodwill, beginning balance	0	0
Acquired goodwill	0	0
Reallocation due to change in segments	13,575,000
Foreign currency adjustment	0	0
Goodwill, ending balance	13,575,000	0
Other Reporting Units
Goodwill
Goodwill, beginning balance	0
Goodwill, ending balance	0	$ 0
Orbotech
Goodwill
Acquired goodwill	1,810,000,000
Acquisition of privately-held companies in 2019
Goodwill
Acquired goodwill	$ 45,400,000