Derivative Financial Instruments (Summary Of The Amount Of (Loss) Recognized In Accumulated Other Comprehensive Income) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012		Jun. 30, 2011
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain (Loss) Recognized in Accumulated Other Comprehensive Income ("AOCI") (Effective Portion)			$ (29.4)	[1]	$ (11.5)	[1]
(Loss) Reclassified from AOCI into Income (Effective Portion)	(2.7)	(2.6)	(5.9)		(5.9)
(Loss) in Accumulated OCI expected to be recognized in earnings			(5.3)
Natural Gas Commodity Contracts [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain (Loss) Recognized in Accumulated Other Comprehensive Income ("AOCI") (Effective Portion)			(7.0)	[1]	(2.9)	[1]
Foreign Exchange Contracts - Purchases And Sales [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain (Loss) Recognized in Accumulated Other Comprehensive Income ("AOCI") (Effective Portion)			1.8	[1]	(1.9)	[1]
Interest Rate Swap Contracts [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain (Loss) Recognized in Accumulated Other Comprehensive Income ("AOCI") (Effective Portion)			(24.2)	[1]	(6.7)	[1]
Cost Of Goods Sold [Member] | Natural Gas Commodity Contracts [Member]
Derivative Instruments, Gain (Loss) [Line Items]
(Loss) Reclassified from AOCI into Income (Effective Portion)	(2.4)	(1.3)	(5.1)		(3.8)
Cost Of Goods Sold [Member] | Foreign Exchange Contracts - Purchases And Sales [Member]
Derivative Instruments, Gain (Loss) [Line Items]
(Loss) Reclassified from AOCI into Income (Effective Portion)	$ (0.3)	$ (1.3)	$ (0.8)		$ (2.1)

[1] As of June 30, 2012 the amount of existing (loss) in Accumulated OCI expected to be recognized in earnings over the next twelve months is $(5.3) million.