Contingencies (Tables)

12 Months Ended

Dec. 31, 2017

Commitments and Contingencies Disclosure [Abstract]

Change of Outstanding Asbestos-related Claims [Table Text Block]

	2017		2016
Beginning Claims January 1	9,385		10,061
New Claims Received	2,116		2,078
Dismissed Claims	(1,866	)	(2,402	)
Settled Claims	(410	)	(352	)
Ending Claims December 31	9,225		9,385

Schedule of Causes of Increase (Decrease) in Liability for Unpaid Claims and Claims Adjustment Expense [Table Text Block]

(millions of dollars)	2017			2016
Beginning Asbestos Liability as of January 1	$	879.3		$	969.8
Actuarial revaluation	—			(45.5		)
Indemnity and Defense Related Costs	(51.1		)	(45.0		)
Ending Asbestos Liability as of December 31	$	828.2		$	879.3

Schedule Of Liability For Unpaid Claims And Claims Adjustment Expenses [Table Text Block]

	December 31,
(millions of dollars)	2017		2016
Assets:
Non-current assets	$	386.4	$	386.4
Total insurance assets	$	386.4	$	386.4
Liabilities:
Accounts payable and accrued expenses	$	52.5	$	51.7
Other non-current liabilities	775.7		827.6
Total accrued liabilities	$	828.2	$	879.3