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Business Combinations - Orbotech Preliminary Purchase Price Allocation (Details) - USD ($) | Feb. 20, 2019 | Dec. 24, 2018 | Sep. 30, 2019 | Jun. 30, 2019
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Allocation |  |  |  |  |
Goodwill | [1] |  |  | $ 2,263,689,000 | $ 2,211,858,000
Common Stock |  |  |  |  |
Allocation |  |  |  |  |
Merger agreement, share price (in dollars per share) |  | $ 108.26 |  |  |
Orbotech |  |  |  |  |
Business Acquisition |  |  |  |  |
Cash for outstanding Orbotech shares | [2] | $ 1,901,948,000 |  |  |
Fair value of KLA-Tencor common stock issued for outstanding Orbotech shares | [3] | 1,324,657,000 |  |  |
Cash for Orbotech equity awards | [4] | 9,543,000 |  |  |
Fair value of KLA-Tencor common stock issued to settle Orbotech equity awards | [5] | 6,129,000 |  |  |
Stock options and RSUs assumed | [6] | 13,281,000 |  |  |
Total purchase consideration |  | 3,255,558,000 |  |  |
Less: cash acquired |  | (215,640,000) |  |  |
Total purchase consideration, net of cash acquired |  | 3,039,918,000 |  |  |
Allocation |  |  |  |  |
Accounts receivable, net |  | 200,517,000 |  |  |
Inventories |  | 330,325,000 |  |  |
Contract assets |  | 63,181,000 |  |  |
Other current assets |  | 73,561,000 |  |  |
Property, plant and equipment, net |  | 102,197,000 |  |  |
Goodwill |  | 1,809,625,000 |  |  |
Intangible assets |  | 1,553,570,000 |  |  |
Other non-current assets |  | 73,179,000 |  |  |
Accounts payable |  | (53,015,000) |  |  |
Accrued liabilities |  | (178,849,000) |  |  |
Other current liabilities | [7] | (69,449,000) |  |  |
Deferred tax liabilities | [8] | (777,838,000) |  |  |
Other non-current liabilities | [7] | (67,901,000) |  |  |
Non-controlling interest |  | (19,185,000) |  |  |
Total purchase consideration |  | $ 3,039,918,000 |  |  |
Merger agreement, share price (in dollars per share) |  | $ 38.86 |  |  |
Shares of common stock issued in acquisition (in shares) |  | 12,200,000 |  |  |
Merger agreement, entity shares issues per acquiree share (in shares) |  | 0.25 |  |  |
Orbotech stock options vested and unsettled (in shares) |  | 56,614 |  |  |
Cash for outstanding Orbotech shares | [2] | $ 1,901,948,000 |  |  |
Purchase consideration, liability incurred, payment term |  | 4 years |  |  |
Contingent consideration, deferred cash payments |  | $ 8,800,000 |  | 8,800,000 |
Contingent consideration, earn-out |  | 7,100,000 |  | 3,200,000 |
Contingent consideration, current |  | 4,300,000 |  | 4,300,000 |
Contingent consideration, non-current |  | $ 11,600,000 |  | $ 7,700,000 |
Orbotech |  |  |  |  |
Allocation |  |  |  |  |
Shares outstanding (in shares) |  | 48,900,000 |  |  |
Orbotech | Frontline |  |  |  |  |
Business Acquisition |  |  |  |  |
Cash for outstanding Orbotech shares |  |  | $ 85,000,000.0 |  |
Allocation |  |  |  |  |
Percentage of outstanding shares acquired |  |  | 50.00% |  |
Cash for outstanding Orbotech shares |  |  | $ 85,000,000.0 |  |
Purchase consideration, liability incurred |  |  | $ 10,000,000.0 |  |
Purchase consideration, liability incurred, payment term |  |  | 4 years |  |
Cash earn-out, minimum |  |  | $ 5,000,000.0 |  |
Cash earn-out, maximum |  |  | $ 20,000,000.0 |  |
[1] | No goodwill was assigned to the Other reporting unit, and accordingly was excluded in the table above.
[2] | Represents the total cash paid to settle 48.9 million outstanding Orbotech shares as of February 20, 2019 at $38.86 per Orbotech share.
[3] | Represents the fair value of 12.2 million shares of our common stock issued to settle 48.9 million outstanding Orbotech shares. KLA issued 0.25 shares for each Orbotech share. The fair value of KLA’s common stock was $108.26 per share on the Acquisition Date.
[4] | Represents primarily cash consideration for the settlement of the vested stock options and restricted stock units for which services were rendered by the employees of Orbotech prior to the closing, and a small portion for the settlement of fractional shares.
[5] | Represents the fair value of share of 56,614 shares of KLA common stock issued to settle the vested Orbotech stock options. The fair value of KLA’s common stock was $108.26 per share on the Acquisition Date.
[6] | Represents the fair value of the assumed stock options and RSUs to the extent those related to services provided by the employee of Orbotech prior to closing. Also refer to Note 10, “Equity, Long-Term Incentive Compensation Plans and Non-Controlling Interest” of the Condensed Consolidated Financial Statements for additional information about assumed stock options and RSUs.
[7] | On December 24, 2018, Orbotech, as part of its strategy to invest in the high growth area of the software business within the Printed Circuit Boards (“PCB”) industry, acquired the remaining 50% shares of Frontline, which was prior to that accounted as an equity investee, from Mentor Graphics Development Services (Israel) Ltd. Orbotech acquired all of the joint venture interests it did not previously own for $85.0 million in cash on hand and agreed to pay an additional $10.0 million in cash over four years plus a cash earn-out of not less than $5.0 million and up to $20.0 million. The earn out amounts are based on revenues from a Frontline product currently under development. As of February 20, 2019, the estimated fair market values of the four-year cash payment and the earn-out were $8.8 million and $7.1 million, respectively, and these amounts have been included in current and non-current liabilities at $4.3 million and $11.6 million respectively. As of September 30, 2019, the estimated fair market values of the four-year cash payment and the earn-out were $8.8 million and $3.2 million, respectively, and these amounts have been included in current and non-current liabilities at $4.3 million and $7.7 million respectively.
[8] | Primarily related to tax impact on the future amortization of intangible assets acquired and inventory fair value adjustments.

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- Definition The cash inflow associated with the acquisition of business during the period (for example, cash that was held by the acquired business). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 12 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3179-108585 + Details
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- Definition The cash outflow associated with the acquisition of business during the period. The cash portion only of the acquisition price. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (b)(1) -URI http://asc.fasb.org/extlink&oid=35744584&loc=d3e6927-128479 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 13 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3213-108585 + Details
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