Annual report pursuant to Section 13 and 15(d)

Subsequent Event - Additional Information (Detail)

v2.4.1.9
Subsequent Event - Additional Information (Detail) (USD $)
In Millions, unless otherwise specified
12 Months Ended 0 Months Ended
Dec. 31, 2014
Jan. 14, 2015
Subsequent Event [Line Items]    
Description of a business entity Armstrong, located in Itasca, Illinois, is a leading provider of engineering, design and certification solutions for commercial aircraft, specializing in connectivity, in-flight entertainment, and electrical power systems.  
Subsequent Event [Member]    
Subsequent Event [Line Items]    
Business entity purchased date   Jan. 14, 2015
Percentage of acquired stock   100.00%us-gaap_BusinessAcquisitionPercentageOfVotingInterestsAcquired
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Business acquisition purchase price paid in cash   $ 52.0us-gaap_PaymentsToAcquireBusinessesGross
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