Property, Plant and Equipment

12 Months Ended

Dec. 31, 2015

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)	2015		2014
Land		$	17.6	$	15.1
Buildings and improvements	5-50	412.8		410.6
Machinery and equipment	10-15	674.8		654.1
Molds and dies	4-7	94.4		94.8
Computer hardware and software	3-10	118.3		111.3
Construction in progress		122.4		104.9
		$	1,440.3	$	1,390.8

Depreciation expense for the years ended December 31, 2015, 2014 and 2013 was $86.1 million, $84.8 million and $81.0 million, respectively.

Capitalized leases included in 'buildings and improvements' were $2.0 million and $2.2 million at December 31, 2015 and 2014, respectively. Capitalized leases included in 'machinery and equipment' were $1.5 million and $1.7 million at December 31, 2015 and 2014, respectively. Accumulated depreciation on all property, plant and equipment accounted for as capitalized leases was $2.1 million and $2.2 million at December 31, 2015 and 2014, respectively. At December 31, 2015, future minimum payments under capital leases were immaterial in 2016.

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, 2015, 2014 and 2013 was $1.5 million, $1.6 million and $1.6 million, respectively.