Other Intangible Assets (Tables)

12 Months Ended

Dec. 31, 2016

Goodwill and Intangible Assets Disclosure [Abstract]

Schedule of finite-lived intangible assets

Information regarding other intangible assets follows:

	December 31, 2016							December 31, 2015
	Weighted Average Useful Life (Years)	Gross Value		Accumulated Amortization		Net Value		Gross Value		Accumulated Amortization		Net Value
		(In millions)
Customer relationships	11.1	$	75.5	$	23.7	$	51.8	$	76.0	$	18.5	$	57.5
Indefinite-lived tradenames	*	22.4		*		22.4		18.7		*		18.7
Technology	18.6	23.0		1.8		21.2		15.9		0.9		15.0
Other	8.2	4.0		2.8		1.2		4.1		2.5		1.6
Total		$	124.9	$	28.3	$	96.6	$	114.7	$	21.9	$	92.8
* Not applicable. Tradenames have an indefinite life.

Schedule of indefinite-lived intangible assets

Information regarding other intangible assets follows:

	December 31, 2016							December 31, 2015
	Weighted Average Useful Life (Years)	Gross Value		Accumulated Amortization		Net Value		Gross Value		Accumulated Amortization		Net Value
		(In millions)
Customer relationships	11.1	$	75.5	$	23.7	$	51.8	$	76.0	$	18.5	$	57.5
Indefinite-lived tradenames	*	22.4		*		22.4		18.7		*		18.7
Technology	18.6	23.0		1.8		21.2		15.9		0.9		15.0
Other	8.2	4.0		2.8		1.2		4.1		2.5		1.6
Total		$	124.9	$	28.3	$	96.6	$	114.7	$	21.9	$	92.8
* Not applicable. Tradenames have an indefinite life.

Schedule of amortization of intangible assets

Amortization expense of other intangible assets follows:

	Year Ended December 31,
	2016		2015		2014
	(In millions)
Amortization expense	$	6.1	$	6.4	$	4.8

Amortization for the next five years

We estimate amortization expense for the five years subsequent to December 31, 2016 as follows:

	(In millions)
2017	$	6.6
2018	$	6.4
2019	$	6.0
2020	$	5.8
2021	$	5.8