Goodwill and Intangible Assets (Tables)

12 Months Ended

Dec. 31, 2016

Goodwill and Intangible Assets Disclosure [Abstract]

The changes in the carrying amount of goodwill in 2016 and 2015, in total and by segment, are summarized in the table below (in millions):



Segment:	Balance at December 31, 2014 ⁽²⁾		Impairment			Other⁽¹⁾			Balance at December 31, 2015		Impairment		Other⁽¹⁾			Balance at December 31, 2016
Residential Heating & Cooling	$	26.1	$	—		$	—		$	26.1	$	—	$	—		$	26.1
Commercial Heating & Cooling	62.3		—			(1.7		)	60.6		—		(0.5		)	60.1
Refrigeration	121.0		(5.5		)	(7.1		)	108.4		—		0.5			108.9
	$	209.4	$	(5.5	)	$	(8.8	)	$	195.1	$	—	$	—		$	195.1

⁽¹⁾ Other consists of changes in foreign currency translation rates.

⁽²⁾ The goodwill balances in the table above are presented net of accumulated impairment charges of $15.7 million, all of which relate to impairments in periods prior to 2014.

Summary of amortization of intangible assets

Identifiable intangible and other assets subject to amortization were recorded in Other assets, net in the accompanying Consolidated Balance Sheets and were comprised of the following (in millions):



	As of December 31,
	2016							2015
	Gross Amount		Accumulated Amortization			Net Amount		Gross Amount		Accumulated Amortization			Net Amount
Customer relationships ⁽¹⁾	15.9		(14.9		)	1.0		15.9		(14.6		)	1.3
Patents and others	12.7		(6.4		)	6.3		11.2		(6.3		)	4.9
Total	$	28.6	$	(21.3	)	$	7.3	$	27.1	$	(20.9	)	$	6.2

⁽¹⁾ The impairment related to customer relationships has been removed from the gross amount as well as the accumulated amortization, but is included in amortization expense for the previous year.

Amortization expense

Amortization expense related to these intangible and other assets was as follows (in millions):



	For the Years Ended December 31,
	2016		2015		2014
Amortization expense ⁽¹⁾	$	0.4	$	2.7	$	2.9

Summary of estimated intangible amortization expense for the next five years

Estimated amortization expense for the next five years and thereafter is as follows (in millions):



Estimated Future Amortization Expense:
2017	$	0.4
2018	0.4
2019	0.4
2020	0.4
2021	0.2
Thereafter	5.5