Segment Information (Tables)

9 Months Ended

Sep. 30, 2017

Segment Reporting [Abstract]

Summary of Segment Information

	Three Months Ended September 30,						Nine Months Ended September 30,
	2017			2016			2017			2016
	(in thousands)						(in thousands)
Net sales:
Automotive	$	2,171,008		$	2,095,030		$	6,333,495		$	6,115,186
Industrial	1,244,234			1,162,224			3,729,183			3,482,246
Office products	509,966			535,175			1,533,372			1,493,434
Electrical/electronic materials	199,236			178,448			588,281			538,803
Other	(28,538		)	(29,134		)	(82,606		)	(70,021		)
Total net sales	$	4,095,906		$	3,941,743		$	12,101,725		$	11,559,648
Operating profit:
Automotive	$	178,202		$	197,874		$	537,291		$	555,156
Industrial	94,595			85,608			281,269			255,704
Office products	23,974			30,257			85,184			97,101
Electrical/electronic materials	13,547			14,277			42,715			45,105
Total operating segment profit	310,318			328,016			946,459			953,066
Interest expense, net	(8,202		)	(5,244		)	(21,254		)	(14,731		)
Other intangible assets amortization	(11,845		)	(10,339		)	(34,085		)	(28,324		)
Other, net	(43,916		)	(21,076		)	(103,853		)	(71,957		)
Income before income taxes	$	246,355		$	291,357		$	787,267		$	838,054