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Contingencies (Tables)
12 Months Ended
Dec. 31, 2016
Commitments and Contingencies Disclosure [Abstract]  
Estimated Future Settlement Of Existing Claims [Table Text Block]
 
December 31,
(millions of dollars)
2016
 
2015
Assets:
 

 
 

Non-current assets
$
386.4

 
$
277.3

Total insurance assets
$
386.4

 
$
277.3

Liabilities:


 
 

Accounts payable and accrued expenses
$
51.7

 
$
47.7

Other non-current liabilities
827.6

 
60.8

Total accrued liabilities
$
879.3

 
$
108.5