Property, Plant and Equipment

12 Months Ended

Dec. 31, 2016

Property, Plant and Equipment [Abstract]

Property, Plant and Equipment

Property, Plant and Equipment

A summary of gross property, plant and equipment at December 31 is presented in the following table:

($ in millions)	Expected useful lives (years)	2016		2015
Land		$	18.6	$	17.6
Buildings and improvements	5-50	443.3		412.8
Machinery and equipment	10-15	698.5		674.8
Molds and dies	4-7	98.3		94.4
Computer hardware and software	3-10	121.9		118.3
Construction in progress		174.1		122.4
		$	1,554.7	$	1,440.3

Depreciation expense for the years ended December 31, 2016, 2015 and 2014 was $88.1 million, $86.1 million and $84.8 million, respectively.

There were no capitalized leases included in buildings and improvements at December 31, 2016. Capitalized leases included in machinery and equipment were $1.5 million at December 31, 2016. Capitalized leases included in buildings and improvements and machinery and equipment were $2.0 million and $1.5 million at December 31, 2015, respectively. Accumulated depreciation on all property, plant and equipment accounted for as capitalized leases was $1.5 million and $2.1 million at December 31, 2016 and 2015, respectively.

We capitalize interest on borrowings during the active construction period of major capital projects. Capitalized interest is added to the cost of the underlying assets and is amortized over the useful lives of the assets. Capitalized interest for the years ended December 31, 2016, 2015 and 2014 was $3.6 million, $1.5 million and $1.6 million, respectively.

During 2016, as part of our restructuring plan, we recorded within other expense a $4.5 million non-cash asset write-down associated with the discontinued use of certain equipment.