Gross Carrying Amount and Accumulated Amortization of Intangible Assets (Detail) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Intangible Assets [Line Items]
Definite-lived intangible assets, Gross Amount	$ 3,316,835	$ 2,921,538
Gross Amount	3,370,935	2,931,538
Definite-lived intangible assets, Accumulated Amortization	1,599,573	1,254,360
Definite-lived intangible assets, Net Book Value	1,717,262	1,667,178
Net Book Value	1,771,362	1,677,178
Indefinite-lived intangible assets, Gross Amount	54,100	10,000
Indefinite-lived intangible assets	54,100	10,000
Trademarks and Trade Names
Intangible Assets [Line Items]
Indefinite-lived intangible assets, Gross Amount		5,900
Indefinite-lived intangible assets		5,900
In-process Research and Development
Intangible Assets [Line Items]
Indefinite-lived intangible assets, Gross Amount	54,100	4,100
Indefinite-lived intangible assets	54,100	4,100
Customer relationships
Intangible Assets [Line Items]
Definite-lived intangible assets, Gross Amount	1,672,470	1,572,947
Definite-lived intangible assets, Accumulated Amortization	780,655	624,719
Definite-lived intangible assets, Net Book Value	891,815	948,228
Developed technology, patents & licenses
Intangible Assets [Line Items]
Definite-lived intangible assets, Gross Amount	1,521,893	1,248,719
Definite-lived intangible assets, Accumulated Amortization	771,200	571,808
Definite-lived intangible assets, Net Book Value	750,693	676,911
Trademarks and Trade Names
Intangible Assets [Line Items]
Definite-lived intangible assets, Gross Amount	87,472	83,472
Definite-lived intangible assets, Accumulated Amortization	41,885	41,433
Definite-lived intangible assets, Net Book Value	45,587	42,039
Backlog
Intangible Assets [Line Items]
Definite-lived intangible assets, Gross Amount	35,000	16,400
Definite-lived intangible assets, Accumulated Amortization	5,833	$ 16,400
Definite-lived intangible assets, Net Book Value	$ 29,167