Restructuring Costs - Summary of Costs (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Restructuring Cost and Reserve [Line Items]
Expected Costs	$ 34.8
Cost incurred to date	23.6	$ 5.1
Remaining costs at 12/31/15	6.1
2015 Restructuring Actions
Restructuring Cost and Reserve [Line Items]
Expected Costs	25.3
Cost incurred to date	19.2	0.0
Remaining costs at 12/31/15	6.1
2014 Restructuring Actions
Restructuring Cost and Reserve [Line Items]
Expected Costs	9.5
Cost incurred to date	4.4	5.1
Remaining costs at 12/31/15	0.0
Operating Segments | Electrical | 2015 Restructuring Actions
Restructuring Cost and Reserve [Line Items]
Expected Costs	23.4
Cost incurred to date	17.3	0.0
Remaining costs at 12/31/15	6.1
Operating Segments | Electrical | 2014 Restructuring Actions
Restructuring Cost and Reserve [Line Items]
Expected Costs	9.5
Cost incurred to date	4.4	5.1
Remaining costs at 12/31/15	0.0
Operating Segments | Power | 2015 Restructuring Actions
Restructuring Cost and Reserve [Line Items]
Expected Costs	1.9
Cost incurred to date	1.9	0.0
Remaining costs at 12/31/15	0.0
Operating Segments | Power | 2014 Restructuring Actions
Restructuring Cost and Reserve [Line Items]
Expected Costs	0.0
Cost incurred to date	0.0	$ 0.0
Remaining costs at 12/31/15	$ 0.0