Contingencies (Tables)

3 Months Ended

Mar. 31, 2012

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, 2012		December 31, 2011
Assets:
Prepayments and other current assets	$	28.9	$	28.8
Other non-current assets	35.2		32.9
Total insurance assets	$	64.1	$	61.7
Liabilities:
Accounts payable and accrued expenses	$	28.9	$	28.8
Other non-current liabilities	35.2		32.9
Total accrued liabilities	$	64.1	$	61.7