Schedule Of Unrecognized Tax Benefit Reconciliation (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended			9 Months Ended	12 Months Ended
	Sep. 30, 2011	Jun. 30, 2011	Mar. 31, 2011	Sep. 30, 2011	Dec. 31, 2012	Dec. 31, 2011
Reconciliation of Unrecognized Tax Benefits [Line Items]
Beginning balance			$ 19.71	$ 19.71	$ 18.41	$ 19.71
Additions based on tax positions relate to the current year					7.37	5.81
Reductions for tax positions of prior years	(0.30)	0	(0.30)	(2.60)	(0.24)	(3.46)
Foreign currency translation effect					(0.60)	(3.65)
Ending balance					24.94	18.41
Income taxes Paid, see below					(20.58)	(18.24)
Amounts, net of Income taxes Paid					$ 4.36	$ 0.17