Business Combinations - Additional Information (Detail) - KLA-Tencor Corporation - Subsequent Event $ / shares in Units, shares in Millions, $ in Billions	Oct. 20, 2015 USD ($) $ / shares shares
Business Acquisition [Line Items]
Cash payments	$ 5.0
Shares issued | shares	80
Shares issued, value	$ 5.6
Business acquisition ownership percentage	32.00%
Converted stock multiplier, mixed consideration	0.5
Conversion amount, mixed consideration | $ / shares	$ 32.00
Converted stock multiplier, all stock consideration	0.5
Converted amount multiplier, all stock consideration | $ / shares	$ 32.00
Measurement period	5 days
Conversion amount | $ / shares	$ 32.00
Converted stock multiplier	0.5
Debt financing	$ 3.9
Bridge financing	$ 4.2