Contingencies (Tables)

12 Months Ended

Dec. 31, 2011

Commitments and Contingencies Disclosure [Abstract]

Estimated Future Settlement Of Existing Claims

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

	December 31,
(millions of dollars)	2011		2010
Assets:
Prepayments and other current assets	$	28.8	$	25.8
Other non-current assets	32.9		24.8
Total insurance assets	$	61.7	$	50.6
Liabilities:
Accounts payable and accrued expenses	$	28.8	$	25.8
Other non-current liabilities	32.9		24.8
Total accrued liabilities	$	61.7	$	50.6