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		6 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2012	Dec. 31, 2011	Jun. 30, 2012
Location in Financial Statements [Abstract]
Gains (losses) in accumulated OCI on derivatives (effective portion)	$ 2,242	$ (223)	$ 2,001	$ (1,417)
Gains (losses) reclassified from accumulated OCI into income (effective portion)	128	(702)	(964)	(925)
Outstanding Notional Amounts of Hedge Contracts
Cash flow hedge contracts, purchase	14,722		14,722		14,689
Cash flow hedge contracts, sell	30,752		30,752		29,362
Other foreign currency hedge contracts, purchase	118,588		118,588		121,965
Other foreign currency hedge contracts, sell	94,406		94,406		126,827
Other Current Assets
Derivative Assets (Liabilities), at Fair Value, Net, by Balance Sheet Classification [Abstract]
Asset derivatives fair value	6,169		6,169		1,407
Other Current Liabilities
Derivative Assets (Liabilities), at Fair Value, Net, by Balance Sheet Classification [Abstract]
Liability derivatives fair value	870		870		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)	128	(702)	(964)	(925)
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	2,322		2,322		128
Asset derivatives fair value	2,322		2,322		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	0		0		736
Liability derivatives fair value	0		0		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	3,847		3,847		1,279
Asset derivatives fair value	3,847		3,847		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	870		870		1,173
Liability derivatives fair value	870		870		1,173
Revenues \| Derivatives Designated as Hedging Instruments
Location in Financial Statements [Abstract]
Gains (losses) reclassified from accumulated OCI into income (effective portion)	(82)	(689)	(574)	(973)
Costs of revenues \| Derivatives Designated as Hedging Instruments
Location in Financial Statements [Abstract]
Gains (losses) reclassified from accumulated OCI into income (effective portion)	210	(13)	(390)	48
Interest income and other, net \| Derivatives Designated as Hedging Instruments
Location in Financial Statements [Abstract]
Gains (losses) recognized in income on derivatives (ineffectiveness portion and amount excluded from effectiveness testing)	(40)	57	11	99
Interest income and other, net \| Not Designated as Hedging Instrument [Member]
Location in Financial Statements [Abstract]
Gains (losses) recognized in income	9,220	758	9,894	(11,810)
Accumulated OCI \| Derivatives Designated as Hedging Instruments
Location in Financial Statements [Abstract]
Gains (losses) in accumulated OCI on derivatives (effective portion)	$ 2,242	$ (223)	$ 2,001	$ (1,417)
Cash Flow Hedging [Member] \| Derivatives Designated as Hedging Instruments
Derivative Instruments
Derivative maximum maturity, cash flow hedges	18 months