Goodwill and Other Intangible Assets (Tables)

6 Months Ended

Jun. 30, 2013

Goodwill and Intangible Assets Disclosure [Abstract]

Change in the carrying amount of goodwill

The changes in the carrying amount of goodwill for the six months ended June 30, 2013 were as follows:

	Mobile Industries		Process Industries		Aerospace			Steel		Total
Beginning balance	$	17.7	$	146.4	$	162.2		$	12.6	$	338.9
Acquisitions	5.5		17.6		—			—		23.1
Other	—		0.6		(0.1		)	—		0.5
Ending balance	$	23.2	$	164.6	$	162.1		$	12.6	$	362.5

Intangible assets

The following table displays intangible assets as of June 30, 2013 and December 31, 2012:

	As of June 30, 2013						As of December 31, 2012
	Gross Carrying Amount		Accumulated Amortization		Net Carrying Amount		Gross Carrying Amount		Accumulated Amortization		Net Carrying Amount
Intangible assets subject to amortization:
Customer relationships	$	163.3	$	44.9	$	118.4	$	159.6	$	38.1	$	121.5
Know-how	32.8		3.5		29.3		26.1		2.8		23.3
Industrial license  agreements	0.2		0.1		0.1		0.2		0.1		0.1
Land-use rights	8.8		4.3		4.5		8.6		4.1		4.5
Patents	2.2		1.7		0.5		2.5		1.8		0.7
Technology use	46.2		12.2		34.0		47.0		11.5		35.5
Trademarks	4.7		2.4		2.3		4.2		3.4		0.8
PMA licenses	8.8		3.8		5.0		8.8		3.6		5.2
Non-compete  agreements	4.7		3.6		1.1		4.4		3.3		1.1
Unpatented technology	7.2		7.2		—		7.2		6.7		0.5
	$	278.9	$	83.7	$	195.2	$	268.6	$	75.4	$	193.2
Intangible assets not subject to amortization:
Tradename	$	17.3	$	—	$	17.3	$	17.3	$	—	$	17.3
FAA air agency  certificates	14.2		—		14.2		14.2		—		14.2
	$	31.5	$	—	$	31.5	$	31.5	$	—	$	31.5
Total intangible assets	$	310.4	$	83.7	$	226.7	$	300.1	$	75.4	$	224.7