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

Quarterly report pursuant to Section 13 or 15(d)

Debt - Senior Notes (Details)

Debt - Senior Notes (Details) - USD ($)		1 Months Ended	3 Months Ended			6 Months Ended
Debt - Senior Notes (Details) - USD ($)	Nov. 19, 2014	Nov. 30, 2017	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2014	Dec. 31, 2017	Dec. 31, 2016	Jun. 30, 2017	Nov. 30, 2014	Oct. 31, 2014
Debt Instrument
Cash dividends declared (in dollars per share)			$ 0.59	$ 0.54		$ 1.18	$ 1.06
Unamortized discount			$ 2,704,000			$ 2,704,000		$ 2,901,000
Repayment of debt						$ 696,250,000	$ 80,000,000
Portion of senior notes \| Derivatives designated as hedging instruments \| Treasury lock \| Senior notes \| Cash flow hedge contracts
Debt Instrument
Notional amount of derivative										$ 1,000,000,000.00
Special cash dividend
Debt Instrument
Cash dividends declared (in dollars per share)	$ 16.50
Cash dividends					$ 2,760,000,000
Senior notes
Debt Instrument
Face amount									$ 2,500,000,000.0
Unamortized discount									4,000,000
Repayment of debt		$ 250,000,000
Redemption price						101.00%
Fair value disclosure			$ 2,410,000,000			$ 2,410,000,000		$ 2,670,000,000
Senior notes \| Standard & Poor's, BB plus Rating
Debt Instrument
Decrease in credit rating, interest rate adjustment (in bps)						0.25%
Senior notes \| Standard & Poor's, BB Rating
Debt Instrument
Decrease in credit rating, interest rate adjustment (in bps)						0.50%
Senior notes \| Standard & Poor's, BB- Rating
Debt Instrument
Decrease in credit rating, interest rate adjustment (in bps)						0.75%
Senior notes \| Standard & Poor's, B Plus or Below
Debt Instrument
Decrease in credit rating, interest rate adjustment (in bps)						1.00%
Senior notes \| Moody's, Ba1 Rating
Debt Instrument
Decrease in credit rating, interest rate adjustment (in bps)						0.25%
Senior notes \| Moody's, Ba2 Rating
Debt Instrument
Decrease in credit rating, interest rate adjustment (in bps)						0.50%
Senior notes \| Moody's, Ba3 Rating
Debt Instrument
Decrease in credit rating, interest rate adjustment (in bps)						0.75%
Senior notes \| Moody's, B1 Rating
Debt Instrument
Decrease in credit rating, interest rate adjustment (in bps)						1.00%
Senior notes \| 2018 Senior Notes \| Derivatives Not Designated as Hedging Instruments \| Treasury lock
Debt Instrument
Face amount									$ 750,000,000