Property, Plant and Equipment (Tables)

12 Months Ended

Dec. 31, 2017

Property, Plant and Equipment [Abstract]

Summary of 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)	2017		2016
Land		$	21.4	$	18.6
Buildings and improvements	5-50	539.2		443.3
Machinery and equipment	10-15	793.4		698.5
Molds and dies	4-7	114.5		98.3
Computer hardware and software	3-10	144.6		121.9
Construction in progress		132.7		174.1
		$	1,745.8	$	1,554.7