Contingencies (Tables)

12 Months Ended

Dec. 31, 2012

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)	2012		2011
Assets:
Prepayments and other current assets	$	—	$	28.8
Other non-current assets	85.6		32.9
Total insurance assets	$	85.6	$	61.7
Liabilities:
Accounts payable and accrued expenses	$	36.5	$	28.8
Other non-current liabilities	49.1		32.9
Total accrued liabilities	$	85.6	$	61.7

The 2012 increase in the accrued liability and associated insurance asset is primarily due to an expected higher rate of claim settlement based on recent litigation claim activity.