Goodwill and Intangible Assets (Tables)

12 Months Ended

Dec. 31, 2017

Goodwill and Intangible Assets Disclosure [Abstract]

The changes in the carrying amount of goodwill in 2017 and 2016, in total and by segment, are summarized in the table below (in millions):



Segment:	Balance at December 31, 2015 ⁽¹⁾		Change in foreign currency translation rate			Balance at December 31, 2016		Change in foreign currency translation rate		Balance at December 31, 2017
Residential Heating & Cooling	$	26.1	$	—		$	26.1	$	—	$	26.1
Commercial Heating & Cooling	60.6		(0.5		)	60.1		2.1		62.2
Refrigeration	108.4		0.5			108.9		3.3		112.2
	$	195.1	$	—		$	195.1	$	5.4	$	200.5

⁽¹⁾ The goodwill balances in the table above are presented net of accumulated impairment charges of $21.2 million, all of which relate to impairments in periods prior to 2016.

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,
	2017							2016
	Gross Amount		Accumulated Amortization			Net Amount		Gross Amount		Accumulated Amortization			Net Amount
Customer relationships	15.8		(15.1		)	0.7		15.9		(14.9		)	1.0
Patents and others	14.3		(6.4		)	7.9		12.7		(6.4		)	6.3
Total	$	30.1	$	(21.5	)	$	8.6	$	28.6	$	(21.3	)	$	7.3

Amortization expense

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



	For the Years Ended December 31,
	2017		2016		2015
Amortization expense ⁽¹⁾	$	0.5	$	0.4	$	2.7

⁽¹⁾ Included in the amortization expense in 2015 are amounts relating to customer relationships that were written off during the fourth quarter of 2015.

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:
2018	$	0.5
2019	0.5
2020	0.4
2021	0.2
2022	0.2
Thereafter	6.8