Business Combinations - Additional Information (Detail)	Oct. 20, 2015 USD ($) $ / shares	Dec. 27, 2015 USD ($)	Nov. 10, 2015 USD ($)	Mar. 12, 2015 USD ($)
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