Research and Development Expenditures (Tables)

6 Months Ended

Jun. 30, 2014

Research and Development [Abstract]

Gross and net expenditures on research and development ("R&D") activities

The following table presents the Company’s gross and net expenditures on R&D activities:

	Three Months Ended June 30,						Six Months Ended June 30,
(millions of dollars)	2014			2013			2014			2013
Gross R&D expenditures	$	101.5		$	84.0		$	196.0		$	166.2
Customer reimbursements	(11.4		)	(11.4		)	(23.9		)	(21.8		)
Net R&D expenditures	$	90.1		$	72.6		$	172.1		$	144.4