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BUSINESS COMBINATIONS - The Allocation Of The Purchase Price To The Estimated Fair Value Of The Assets Acquired And Liabilities (Details) - USD ($) | Feb. 20, 2019 | Dec. 24, 2018 | Jun. 30, 2020 | Feb. 29, 2020 | Aug. 22, 2019 | Jun. 30, 2019 | Jun. 30, 2018
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Finite-Lived And Indefinite-Lived Intangible Assets Acquired As Part Of Business Combination [Line Items] |  |  |  |  |  |  |
Goodwill |  |  | $ 2,045,402,000 |  |  | $ 2,211,858,000 | $ 354,698,000
Cash earn-out, maximum |  |  |  |  | $ 60,000,000.0 |  |
Orbotech |  |  |  |  |  |  |
Finite-Lived And Indefinite-Lived Intangible Assets Acquired As Part Of Business Combination [Line Items] |  |  |  |  |  |  |
Accounts receivable, net | $ 197,873,000 |  |  |  |  |  |
Inventories | 330,325,000 |  |  |  |  |  |
Contract assets | 63,181,000 |  |  |  |  |  |
Other current assets | 70,622,000 |  |  |  |  |  |
Property, plant, and equipment, net | 97,664,000 |  |  |  |  |  |
Identifiable intangible assets | 1,553,570,000 |  |  |  |  |  |
Other non-current assets | 73,179,000 |  |  |  |  |  |
Total assets acquired | 2,386,414,000 |  |  |  |  |  |
Accounts payable | 53,015,000 |  |  |  |  |  |
Accrued liabilities | 173,507,000 |  |  |  |  |  |
Estimated fair value of the additional consideration | 73,057,000 |  |  |  |  |  |
Deferred tax liabilities | 786,671,000 |  |  |  |  |  |
Other non-current liabilities | 86,789,000 |  |  |  |  |  |
Non-controlling interest | 19,185,000 |  |  |  |  |  |
Total liabilities assumed | 1,192,224,000 |  |  |  |  |  |
Total identifiable net assets acquired | 1,194,190,000 |  |  |  |  |  |
Goodwill | 1,845,728,000 |  |  |  |  |  |
Total purchase price |  |  |  | $ 3,039,918,000 |  |  |
Cash for outstanding Orbotech shares | $ 1,700,000,000 |  |  |  |  |  |
Frontline | Orbotech |  |  |  |  |  |  |
Finite-Lived And Indefinite-Lived Intangible Assets Acquired As Part Of Business Combination [Line Items] |  |  |  |  |  |  |
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 |  |  |  |  |
Contingent consideration, deferred cash payments |  | 6,700,000 |  |  |  |  |
Contingent consideration, earn-out |  | 3,300,000 |  |  |  |  |
Contingent consideration, current |  | 2,500,000 |  |  |  |  |
Contingent consideration, non-current |  | $ 7,500,000 |  |  |  |  |

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