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Financial Statement Components - Effects on Net Income (Loss) of Amounts Reclassified from AOCI (Details) - USD ($) $ in Thousands |
3 Months Ended | 9 Months Ended | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
Mar. 31, 2020 |
Dec. 31, 2019 |
Sep. 30, 2019 |
Mar. 31, 2019 |
Dec. 31, 2018 |
Sep. 30, 2018 |
Mar. 31, 2020 |
Mar. 31, 2019 |
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| Accumulated Other Comprehensive Income (Loss) | ||||||||||||
| Revenues | $ 1,423,964 | $ 1,097,311 | $ 4,346,831 | $ 3,310,469 | ||||||||
| Costs of revenues and operating expenses | 1,248,000 | 3,297,788 | ||||||||||
| Interest expense | 39,231 | 31,187 | 120,053 | 84,087 | ||||||||
| Interest and Other Income | 1,004 | 9,282 | 5,190 | 28,535 | ||||||||
| Net income attributable to KLA | 78,452 | $ 380,555 | $ 346,525 | 192,728 | $ 369,100 | 395944美元 | 805,532 | 957,772 | ||||
| Unrealized Gains (Losses) on Defined Benefit Plans | ||||||||||||
| Accumulated Other Comprehensive Income (Loss) | ||||||||||||
| Other comprehensive (income) loss, reclassification adjustment from AOCI, pension and other postretirement benefit plans, net of tax | 200 | 200 | 700 | 600 | ||||||||
| Reclassification out of accumulated other comprehensive income | Unrealized gains (losses) on cash flow hedges from foreign exchange and interest rate contracts | ||||||||||||
| Accumulated Other Comprehensive Income (Loss) | ||||||||||||
| Revenues | 3,051 | [1] | 655 | [1] | 3,416 | 3,343 | ||||||
| Costs of revenues and operating expenses | 12 | [1] | (17) | [1] | (1,806) | (309) | ||||||
| Interest expense | (159) | [1] | 150 | [1] | (358) | 527 | ||||||
| Interest and Other Income | 0 | [1] | 158 | [1] | 0 | 158 | ||||||
| Net income attributable to KLA | 2,904 | [1] | 946 | [1] | 1,252 | 3,719 | ||||||
| Reclassification out of accumulated other comprehensive income | Unrealized gains (losses) on available-for-sale securities | ||||||||||||
| Accumulated Other Comprehensive Income (Loss) | ||||||||||||
| Other expense (income), net | $ (432) | $ (313) | $ (346) | $ (1,263) | ||||||||
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