Financial Instruments (Narrative) (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended	9 Months Ended		9 Months Ended		3 Months Ended
	Sep. 30, 2012	Sep. 30, 2012	Dec. 31, 2011	Sep. 30, 2012 Spain Italy Portugal And Greece [Member]	Sep. 25, 2011 Spain Italy Portugal And Greece [Member]	Jun. 30, 2012 Spanish Government [Member]	Sep. 30, 2012 Italian Government [Member]
Derivatives, Fair Value [Line Items]
Pre-tax loss On forward exchange Contract	$ 7.6	$ 7.6
Interest rate swap, notional amount designated as a hedge			350
Amount in accumulated other comprehensive income, reclassified as expense to the statement of income		0.2
Net revenues to customers				101.4	108.0
Amount collected from past due receivables						$ 17.5	$ 6.5