Contingencies (Tables)

3 Months Ended

Mar. 31, 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)	March 31, 2013		December 31, 2012
Assets:
Prepayments and other current assets	$	—	$	—
Other non-current assets	95.2		85.6
Total insurance assets	$	95.2	$	85.6
Liabilities:
Accounts payable and accrued expenses	$	39.2	$	36.5
Other non-current liabilities	56.0		49.1
Total accrued liabilities	$	95.2	$	85.6