Long-Term Debt (Schedule Of Convertible Debt Instruments Outstanding) (Details) (USD $) In Millions, unless otherwise specified						12 Months Ended		12 Months Ended			12 Months Ended
Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2012 Subordinated Convertible Notes Due 2029 [Member]	Dec. 31, 2012 1.00% Senior Convertible Notes Due 2012 [Member]	Dec. 15, 2009 1.00% Senior Convertible Notes Due 2012 [Member]	Dec. 31, 2012 0.875% Convertible Notes Due 2013 [Member]	Dec. 31, 2012 North America [Member] Subordinated Convertible Notes Due 2029 [Member]	Dec. 31, 2011 North America [Member] Subordinated Convertible Notes Due 2029 [Member]	Dec. 15, 2009 North America [Member] Subordinated Convertible Notes Due 2029 [Member]	Dec. 31, 2012 North America [Member] 4.50% Annual Interest Rate On Subordinated Convertible Notes Until November 2019 [Member]	Dec. 31, 2011 North America [Member] 4.50% Annual Interest Rate On Subordinated Convertible Notes Until November 2019 [Member]	Dec. 31, 2012 North America [Member] 2.25% Annual Interest Rate On Subordinated Convertible Notes Until November 2029 [Member]	Dec. 31, 2011 North America [Member] 2.25% Annual Interest Rate On Subordinated Convertible Notes Until November 2029 [Member]	Dec. 31, 2012 North America [Member] 1.00% Senior Convertible Notes Due 2012 [Member]	Dec. 31, 2011 North America [Member] 1.00% Senior Convertible Notes Due 2012 [Member]	Dec. 15, 2009 North America [Member] 1.00% Senior Convertible Notes Due 2012 [Member]	Sep. 30, 2007 North America [Member] 1.00% Senior Convertible Notes Due 2012 [Member]	Dec. 31, 2012 North America [Member] 0.875% Convertible Notes Due 2013 [Member]	Dec. 31, 2011 North America [Member] 0.875% Convertible Notes Due 2013 [Member]	Nov. 30, 2006 North America [Member] 0.875% Convertible Notes Due 2013 [Member]
Face value							$ 429.5	$ 429.5	$ 162.9					$ 0	$ 10.6	$ 389.7	$ 348.2	$ 355.0	$ 355.0	$ 230.9
Debt discount							(263.0)	(264.4)	(266.6)					0	(0.5)	(74.7)	(126.8)	(20.4)	(40.6)	(124.1)
Book value	1,450.1	1,048.9	429.5			355.0	166.5	165.1						0	10.1			334.6	314.4
Fair value							$ 464.1	$ 412.3						$ 0	$ 9.8			$ 349.7	$ 329.7
Maturity date							November 2029	November 2029		November 2019	November 2019	November 2029	November 2029	October 2012	October 2012			November 2013	November 2013
Interest rate				1.00%	1.00%	0.875%				4.50%	4.50%	2.25%	2.25%	1.00%	1.00%	1.00%		0.875%	0.875%	0.875%
Interest payments							Semi-annually: May 15 & Nov 15	Semi-annually: May 15 & Nov 15						Semi-annually: Apr 15 & Oct 15	Semi-annually: Apr 15 & Oct 15			Semi-annually: May 15 & Nov 15	Semi-annually: May 15 & Nov 15

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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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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- Definition

Carrying amount of long-term debt, net of unamortized discount or premium, including current and noncurrent amounts. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

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