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Long-Term Debt (Schedule Of Long-Term Debt) (Detail) (USD $) In Millions, unless otherwise specified			12 Months Ended			12 Months Ended		12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2011 2016 Notes Issued October 2009 [Member]	Dec. 31, 2012 2016 Notes Issued October 2009 [Member]	Oct. 31, 2009 2016 Notes Issued October 2009 [Member]	Dec. 31, 2011 2016 Notes Issued August 2010 [Member]	Aug. 31, 2010 2016 Notes Issued August 2010 [Member]	Dec. 31, 2012 6.25% Notes [Member]	Oct. 31, 2012 6.25% Notes [Member]
Debt Instrument [Line Items]
Debt instruments Maturity date			Oct. 01, 2016			Oct. 01, 2016		Oct. 01, 2019
Principal Amount	$ 600.0	$ 624.5	$ 472.1		$ 625.0	$ 152.4	$ 200.0	$ 600.0	$ 600.0
Original Issue Discount		(9.5)	(4.5)			(5.0)
Carrying Value		$ 615.0	$ 467.6			$ 147.4		$ 600.0
Debt instrument stated percentage	6.25%			8.75%				6.25%	6.25%

Including current and noncurrent portions, aggregate carrying amount of long-term borrowings as of the balance sheet date before deducting unamortized discount or premiums (if any). May include notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt, which had initial maturities beyond one year or beyond the normal operating cycle, if longer.

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- Definition

The amount of debt discount that was originally recognized at the issuance of the instrument that has yet to be amortized.

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