KLA Corporation Quarterly report pursuant to Section 13 or 15(d)

Quarterly report pursuant to Section 13 or 15(d)

Derivative Instruments and Hedging Activities (Details)

Derivative Instruments and Hedging Activities (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Mar. 31, 2013	Mar. 31, 2012	Mar. 31, 2013	Mar. 31, 2012	Jun. 30, 2012
Location in Financial Statements [Abstract]
Gains in accumulated OCI on derivatives (effective portion)	$ 842	$ 2,269	$ 2,843	$ 852
Gains (losses) reclassified from accumulated OCI into income (effective portion)	848	(98)	(116)	(1,023)
Outstanding Notional Amounts of Hedge Contracts
Cash flow hedge contracts, purchase	14,026		14,026		14,689
Cash flow hedge contracts, sell	66,166		66,166		29,362
Other foreign currency hedge contracts, purchase	99,953		99,953		121,965
Other foreign currency hedge contracts, sell	64,168		64,168		126,827
Other Current Assets
Derivative Assets (Liabilities), at Fair Value, Net, by Balance Sheet Classification [Abstract]
Asset derivatives fair value	4,462		4,462		1,407
Other Current Liabilities
Derivative Assets (Liabilities), at Fair Value, Net, by Balance Sheet Classification [Abstract]
Liability derivatives fair value	1,839		1,839		1,909
Derivatives Designated as Hedging Instruments
Derivative Instruments
Hedge contracts maximum maturity	13 months
Location in Financial Statements [Abstract]
Gains (losses) reclassified from accumulated OCI into income (effective portion)	848	(98)	(116)	(1,023)
Derivatives Designated as Hedging Instruments \| Other Current Assets
Derivative Assets (Liabilities), at Fair Value, Net, by Balance Sheet Classification [Abstract]
Foreign exchange contracts, other current assets	1,620		1,620		128
Asset derivatives fair value	1,620		1,620		128
Derivatives Designated as Hedging Instruments \| Other Current Liabilities
Derivative Assets (Liabilities), at Fair Value, Net, by Balance Sheet Classification [Abstract]
Foreign exchange contracts, other current liabilities	689		689		736
Liability derivatives fair value	689		689		736
Not Designated as Hedging Instrument [Member] \| Other Current Assets
Derivative Assets (Liabilities), at Fair Value, Net, by Balance Sheet Classification [Abstract]
Foreign exchange contracts, other current assets	2,842		2,842		1,279
Asset derivatives fair value	2,842		2,842		1,279
Not Designated as Hedging Instrument [Member] \| Other Current Liabilities
Derivative Assets (Liabilities), at Fair Value, Net, by Balance Sheet Classification [Abstract]
Foreign exchange contracts, other current liabilities	1,150		1,150		1,173
Liability derivatives fair value	1,150		1,150		1,173
Revenues \| Derivatives Designated as Hedging Instruments
Location in Financial Statements [Abstract]
Gains (losses) reclassified from accumulated OCI into income (effective portion)	720	122	146	(851)
Costs of revenues \| Derivatives Designated as Hedging Instruments
Location in Financial Statements [Abstract]
Gains (losses) reclassified from accumulated OCI into income (effective portion)	128	(220)	(262)	(172)
Interest income and other, net \| Derivatives Designated as Hedging Instruments
Location in Financial Statements [Abstract]
Gains recognized in income on derivatives (ineffectiveness portion and amount excluded from effectiveness testing)	61	77	73	175
Interest income and other, net \| Not Designated as Hedging Instrument [Member]
Location in Financial Statements [Abstract]
Gains (losses) recognized in income	4,514	5,605	14,408	(6,205)
Accumulated OCI \| Derivatives Designated as Hedging Instruments
Location in Financial Statements [Abstract]
Gains in accumulated OCI on derivatives (effective portion)	$ 842	$ 2,269	$ 2,843	$ 852
Cash Flow Hedging [Member] \| Derivatives Designated as Hedging Instruments
Derivative Instruments
Derivative maximum maturity, cash flow hedges	18 months