Contingencies (Tables)

6 Months Ended

Jun. 30, 2013

Commitments and Contingencies Disclosure [Abstract]

Estimated future settlement of existing claims

The amounts recorded in the Condensed Consolidated Balance Sheets related to the estimated future settlement of existing claims are as follows:

(millions of dollars)	June 30, 2013		December 31, 2012
Assets:
Prepayments and other current assets	$	—	$	—
Other non-current assets	103.6		85.6
Total insurance assets	$	103.6	$	85.6
Liabilities:
Accounts payable and accrued expenses	$	41.8	$	36.5
Other non-current liabilities	61.8		49.1
Total accrued liabilities	$	103.6	$	85.6