Property, Plant And Equipment (Narrative) (Details) - USD ($) $ in Millions	3 Months Ended				12 Months Ended
	Dec. 31, 2016	Apr. 01, 2016	Dec. 31, 2015	Oct. 02, 2015	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Property, Plant and Equipment [Line Items]
Depreciation expense					$ 66.0	$ 75.8	$ 84.1
Asset impairment charges					2.3	59.5	67.3
Closure | Cost of Sales | India Operations
Property, Plant and Equipment [Line Items]
Asset impairment charges				$ 13.6
Closure | Cost of Sales | Algeria Operations
Property, Plant and Equipment [Line Items]
Asset impairment charges			$ 30.7
Africa/Asia Pacific
Property, Plant and Equipment [Line Items]
Depreciation expense					$ 1.0	$ 4.8	$ 9.2
Africa/Asia Pacific | Closure | Cost of Sales | China Operations
Property, Plant and Equipment [Line Items]
Asset impairment charges	$ 11.0
Africa/Asia Pacific | Closure | Cost of Sales | Egypt Operations
Property, Plant and Equipment [Line Items]
Asset impairment charges		$ 6.0
Africa/Asia Pacific | Closure | Cost of Sales | India Operations
Property, Plant and Equipment [Line Items]
Asset impairment charges				$ 13.6