Accounting for Asset Retirement Obligations (Tables)

6 Months Ended

Jun. 29, 2014

Accounting for Asset Retirement Obligations [Abstract]

Reconciliation of Asset Retirement Obligations

The following is a reconciliation of asset retirement obligations as of June 29, 2014:

	(millions of dollars)
Asset retirement liability, December 31, 2013	$	14.7
Accretion expense		0.3
Reversals		(0.5	)
Acquisition		9.2
Asset retirement liability,  June 29, 2014	$	23.7