Fair Value Measurements (Tables)

3 Months Ended

Mar. 31, 2014

Fair Value Disclosures [Abstract]

Assets and liabilities measured at fair value

The following tables classify assets and liabilities measured at fair value on a recurring basis as of March 31, 2014 and December 31, 2013:

			Basis of fair value measurements
(millions of dollars)	Balance at March 31, 2014		Quoted prices in active markets for identical items (Level 1)		Significant other observable inputs (Level 2)		Significant unobservable inputs (Level 3)		Valuation technique
Assets:
Foreign currency contracts	$	2.2	$	—	$	2.2	$	—	A
Other non-current assets (insurance settlement agreement note receivable)	$	29.9	$	—	$	29.9	$	—	C
Liabilities:
Foreign currency contracts	$	4.7	$	—	$	4.7	$	—	A
Net investment hedge contracts	$	23.7	$	—	$	23.7	$	—	A

			Basis of fair value measurements
(millions of dollars)	Balance at December 31, 2013		Quoted prices in active markets for identical items (Level 1)		Significant other observable inputs (Level 2)		Significant unobservable inputs (Level 3)		Valuation technique
Assets:
Foreign currency contracts	$	3.4	$	—	$	3.4	$	—	A
Other non-current assets (insurance settlement agreement note receivable)	$	35.6	$	—	$	35.6	$	—	C
Liabilities:
Foreign currency contracts	$	7.4	$	—	$	7.4	$	—	A
Net investment hedge contracts	$	24.3	$	—	$	24.3	$	—	A