XML 24 R13.htm IDEA: XBRL DOCUMENT

Property, Plant And Equipment	6 Months Ended
Property, Plant And Equipment	Jun. 30, 2018
Property, Plant And Equipment [Abstract]
Property, Plant And Equipment	6. Property, Plant and Equipment Property, plant and equipment is reported net of accumulated depreciation of $515.1 million at June 30, 2018, and $502.9 million at December 31, 2017. Unpaid capital expenditure liabilities, which are non-cash investing activities, were $3.8 million at June 30, 2018, and $3.8 million at June 30, 2017.