Summary of Revenues from Contracts with Customers by Geographic Areas (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
International Long-Lived Assets by Geographic Region [Line Items]
Net sales	$ 1,726,540	$ 1,664,170	$ 3,304,250	$ 3,147,276
UNITED STATES
International Long-Lived Assets by Geographic Region [Line Items]
Net sales	993,843		1,887,001
Americas, excluding U.S.
International Long-Lived Assets by Geographic Region [Line Items]
Net sales	328,093		583,711
Asia Pacific
International Long-Lived Assets by Geographic Region [Line Items]
Net sales	92,097		199,611
EMEA
International Long-Lived Assets by Geographic Region [Line Items]
Net sales	312,507		633,927
Non-US
International Long-Lived Assets by Geographic Region [Line Items]
Net sales	732,697		1,417,249
Operating Segments | CPE
International Long-Lived Assets by Geographic Region [Line Items]
Net sales	1,008,131	1,155,883	1,883,357	2,210,939
Operating Segments | CPE | UNITED STATES
International Long-Lived Assets by Geographic Region [Line Items]
Net sales	540,452		1,014,614
Operating Segments | CPE | Americas, excluding U.S.
International Long-Lived Assets by Geographic Region [Line Items]
Net sales	220,350		376,213
Operating Segments | CPE | Asia Pacific
International Long-Lived Assets by Geographic Region [Line Items]
Net sales	29,081		51,205
Operating Segments | CPE | EMEA
International Long-Lived Assets by Geographic Region [Line Items]
Net sales	218,248		441,325
Operating Segments | CPE | Non-US
International Long-Lived Assets by Geographic Region [Line Items]
Net sales	467,679		868,743
Operating Segments | N&C
International Long-Lived Assets by Geographic Region [Line Items]
Net sales	549,496	$ 510,972	1,087,760	$ 941,408
Operating Segments | N&C | UNITED STATES
International Long-Lived Assets by Geographic Region [Line Items]
Net sales	345,828		672,311
Operating Segments | N&C | Americas, excluding U.S.
International Long-Lived Assets by Geographic Region [Line Items]
Net sales	105,981		199,881
Operating Segments | N&C | Asia Pacific
International Long-Lived Assets by Geographic Region [Line Items]
Net sales	39,578		95,343
Operating Segments | N&C | EMEA
International Long-Lived Assets by Geographic Region [Line Items]
Net sales	58,109		120,225
Operating Segments | N&C | Non-US
International Long-Lived Assets by Geographic Region [Line Items]
Net sales	203,668		415,449
Operating Segments | Enterprise
International Long-Lived Assets by Geographic Region [Line Items]
Net sales	172,240		342,154
Operating Segments | Enterprise | UNITED STATES
International Long-Lived Assets by Geographic Region [Line Items]
Net sales	111,967		207,682
Operating Segments | Enterprise | Americas, excluding U.S.
International Long-Lived Assets by Geographic Region [Line Items]
Net sales	1,770		7,622
Operating Segments | Enterprise | Asia Pacific
International Long-Lived Assets by Geographic Region [Line Items]
Net sales	23,477		53,102
Operating Segments | Enterprise | EMEA
International Long-Lived Assets by Geographic Region [Line Items]
Net sales	35,026		73,748
Operating Segments | Enterprise | Non-US
International Long-Lived Assets by Geographic Region [Line Items]
Net sales	60,273		134,472
Operating Segments | Other Segments
International Long-Lived Assets by Geographic Region [Line Items]
Net sales	(3,327)		(9,021)
Operating Segments | Other Segments | UNITED STATES
International Long-Lived Assets by Geographic Region [Line Items]
Net sales	(4,404)		(7,606)
Operating Segments | Other Segments | Americas, excluding U.S.
International Long-Lived Assets by Geographic Region [Line Items]
Net sales	(8)		(5)
Operating Segments | Other Segments | Asia Pacific
International Long-Lived Assets by Geographic Region [Line Items]
Net sales	(39)		(39)
Operating Segments | Other Segments | EMEA
International Long-Lived Assets by Geographic Region [Line Items]
Net sales	1,124		(1,371)
Operating Segments | Other Segments | Non-US
International Long-Lived Assets by Geographic Region [Line Items]
Net sales	$ 1,077		$ (1,415)