Other Expense, Net (Tables)

12 Months Ended

Dec. 31, 2015

Other Income and Expenses [Abstract]

Schedule of Other Nonoperating Income (Expense)

	Year Ended December 31,
(millions of dollars)	2015			2014			2013
Restructuring expense	$	65.7		$	90.8		$	39.8
Pension settlement	25.7			3.1			—
Merger and acquisition expense	21.8			—			—
Gain on previously held equity interest	(10.8		)	—			—
Intangible asset impairment	—			10.3			12.5
Program termination agreement	—			—			11.3
Retirement related obligations	—			—			5.9
Other	(1.0		)	(10.4		)	(6.9		)
Other expense, net	$	101.4		$	93.8		$	62.6