Industry Segments and Geographic Area Information (Tables)

12 Months Ended

Dec. 31, 2016

Segment Reporting [Abstract]

Summary of Industry Segment Data

INDUSTRY SEGMENT DATA

	2016			2015			2014
Net Sales:
Electrical	$	2,460.2		$	2,388.3		$	2,398.2
Power	1,045.0			1,002.1			961.2
TOTAL NET SALES	$	3,505.2		$	3,390.4		$	3,359.4
Operating Income:
Electrical	$	267.4		$	279.0		$	337.9
Power	210.4			195.6			179.5
Operating Income	$	477.8		$	474.6		$	517.4
Interest expense	(43.4		)	(31.0		)	(31.2		)
Investment income and other expense, net	(4.0		)	(25.0		)	(0.7		)
INCOME BEFORE INCOME TAXES	$	430.4		$	418.6		$	485.5
Assets:
Electrical	$	2,246.0		$	2,120.9		$	1,963.0
Power	911.5			839.7			832.0
General Corporate	367.5			248.1			525.1
TOTAL ASSETS	$	3,525.0		$	3,208.7		$	3,320.1
Capital Expenditures:
Electrical	$	43.4		$	47.9		$	35.1
Power	22.7			28.4			21.8
General Corporate	1.1			0.8			3.4
TOTAL CAPITAL EXPENDITURES	$	67.2		$	77.1		$	60.3
Depreciation and Amortization:
Electrical	$	61.2		$	56.2		$	53.4
Power	31.1			29.0			25.8
TOTAL DEPRECIATION AND AMORTIZATION	$	92.3		$	85.2		$	79.2

Summary of Product Class Data

PRODUCT CLASS DATA

	2016		2015		2014
Net Sales:
Electrical Systems	$	1,514.4	$	1,476.7	$	1,538.7
Lighting	945.8		911.6		859.5
Power	1,045.0		1,002.1		961.2
TOTAL NET SALES	$	3,505.2	$	3,390.4	$	3,359.4

Summary of Geographic Area Data

GEOGRAPHIC AREA DATA

	2016		2015		2014
Net Sales:
United States	$	3,147.4	$	3,008.4	$	2,883.8
International	357.8		382.0		475.6
TOTAL NET SALES	$	3,505.2	$	3,390.4	$	3,359.4
Operating Income:
United States	$	419.1	$	426.1	$	447.2
International	58.7		48.5		70.2
TOTAL OPERATING INCOME	$	477.8	$	474.6	$	517.4
Long-lived Assets:
United States	$	1,762.9	$	1,627.7	$	1,492.5
International	200.1		187.1		199.7
TOTAL LONG-LIVED ASSETS	$	1,963.0	$	1,814.8	$	1,692.2