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Business Combinations - Additional Information (Detail) | Oct. 20, 2015 USD ($) $ / shares | Dec. 27, 2015 USD ($) | Nov. 10, 2015 USD ($) | Mar. 12, 2015 USD ($)
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KLA-Tencor Corporation |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Converted stock multiplier, mixed consideration | 0.5 |  |  |
Conversion amount, mixed consideration (usd per share) | $ / shares | $ 32.00 |  |  |
Converted stock multiplier, all stock consideration | 0.5 |  |  |
Converted amount multiplier, all stock consideration (usd per share) | $ / shares | $ 32.00 |  |  |
Measurement period | 5 days |  |  |
Conversion amount (usd per share) | $ / shares | $ 32.00 |  |  |
Converted stock multiplier | 0.5 |  |  |
Debt financing | $ 4,000,000,000 |  |  |
Unsecured Debt | Unsecured Term Loan Agreement Total |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Principal amount |  |  | $ 900,000,000 |
Bridge Loan | Unsecured Term Loan Agreement Total |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Principal amount | 900,000,000 |  |  |
Bridge Loan | Senior Unsecured Bridge Loan Facility, tranche one |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Principal amount | $ 3,300,000,000 |  |  |
Revolving credit facility |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Revolving unsecured credit facility |  |  | $ 750,000,000 | $ 300,000,000
Financial Guarantee [Member] | KLA-Tencor Corporation |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Guarantee Obligation Maximum Exposure |  | $ 2,500,000,000.0 |  |

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