Business Combinations (Detail)		12 Months Ended
	Oct. 20, 2015 USD ($) $ / shares	Jun. 26, 2016 USD ($)	May 13, 2016 USD ($)	Apr. 26, 2016 USD ($)	Mar. 31, 2015 USD ($)	Mar. 12, 2014 USD ($)
Selling, general, and administrative
Business Acquisition [Line Items]
Acquisition related costs		$ 51,000,000
Revolving credit facility
Business Acquisition [Line Items]
Revolving unsecured credit facility				$ 750,000,000		$ 300,000,000
Senior unsecured term loan facility | Amended and restated term loan agreement
Business Acquisition [Line Items]
Principal amount			$ 1,530,000,000
Senior notes
Business Acquisition [Line Items]
Principal amount	$ 2,400,000,000				$ 1,000,000,000
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
KLA-Tencor Corporation | Senior notes | Financial obligation | Scenario, Plan
Business Acquisition [Line Items]
Principal amount	2,500,000,000.0
KLA-Tencor Corporation | Merger agreement termination
Business Acquisition [Line Items]
Termination fee	$ 290,000,000