Financial Instruments (Tables)

12 Months Ended

Dec. 31, 2016

Derivative [Line Items]

Schedule of Price Risk Derivatives [Table Text Block]

	Commodity derivative contracts
Commodity	Volume hedged December 31, 2016	Volume hedged December 31, 2015	Units of measure	Duration
Copper	213.8	6,273.2	Metric Tons	Dec -17

Schedule of Interest Rate Derivatives [Table Text Block]

	Interest rate swap contracts
(in millions)	Hedge Type	Notional Amount		Duration
Fixed to floating	Fair value	$	250.0	Sept - 20
Fixed to floating	Fair value	$	134.0	Oct - 19

Schedule of Derivative Instruments in Statement of Financial Position, Fair Value [Text Block]

	Assets					Liabilities
(millions of dollars)	Location	December 31, 2016		December 31, 2015		Location	December 31, 2016		December 31, 2015
Foreign currency	Prepayments and other current assets	$	7.2	$	2.7	Accounts payable and accrued expenses	$	1.1	$	8.7
Commodity	Prepayments and other current assets	$	0.1	$	—	Accounts payable and accrued expenses	$	—	$	10.4
Interest rate swaps	Other non-current assets	$	—	$	—	Other non-current liabilities	$	—	$	2.7

Deferred Losses Reported In Other Comprehensive Income Loss [Text Block]

	Deferred gain (loss) in AOCI at						Gain (loss) expected to be reclassified to income in one year or less
(millions of dollars)	December 31, 2016			December 31, 2015
Foreign currency	$	5.6		$	(0.1	)	$	5.6
Commodity	(0.1		)	(2.1		)	(0.1		)
Net investment hedges	12.6			12.2			—
Foreign currency denominated debt	16.9			$	0.1		—
Total	$	35.0		$	10.1		$	5.5

Derivatives Designated As Cash Flow Hedging Instruments [Text Block]

		Gain (loss) reclassified from AOCI to income (effective portion)							Gain (loss) recognized in income (ineffective portion)
		Year Ended December 31,							Year Ended December 31,
(millions of dollars)	Location	2016			2015			Location	2016			2015
Foreign currency	Sales	$	(0.1	)	$	(1.4	)	SG&A expense	$	0.3		$	(0.5	)
Foreign currency	Cost of goods sold	$	1.4		$	7.2		SG&A expense	$	—		$	0.2
Commodity	Cost of goods sold	$	(1.4	)	$	(0.1	)	Cost of goods sold	$	(0.3	)	$	—
Cross-currency swap	Interest	$	—		$	0.4		Interest expense	$	—		$	—

	Year Ended December 31, 2016
(millions of dollars)	Gain (loss) on swaps		Gain (loss) on borrowings
Income Statement Classification
Interest expense and finance charges	$	8.5	$	(8.5	)

Foreign currency contracts [Member]

Derivative [Line Items]

Foreign Exchange Derivative Contracts Outstanding [Text Block]

Foreign currency derivatives (in millions)
Functional currency	Traded currency	Notional in traded currency December 31, 2016	Notional in traded currency December 31, 2015	Duration
Chinese renminbi	Euro	—	30.5	Dec - 16
Chinese renminbi	US dollar	33.5	13.8	Dec - 17
Euro	British pound	4.2	—	Dec - 17
Euro	Hungarian forint	—	3,434.5	Dec - 16
Euro	Japanese yen	1,004.8	487.1	Dec - 17
Euro	Polish zloty	18.8	—	Dec - 17
Euro	US dollar	35.3	30.1	Dec - 17
Japanese yen	Chinese renminbi	68.7	92.6	Dec - 17
Japanese yen	Korean won	5,689.2	5,998.9	Dec - 17
Japanese yen	US dollar	2.0	3.0	Dec - 17
Korean won	Euro	—	2.5	Dec - 16
Korean won	Japanese yen	539.9	—	Dec - 17
Korean won	US dollar	14.2	77.9	Dec - 17
Mexican peso	US dollar	10.5	—	Dec - 17
Swedish krona	Euro	48.2	—	Dec - 17
US dollar	Mexican peso	—	469.0	Sept - 16