Derivative Financial Instruments (Narrative) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2011
Derivative Instruments, Gain (Loss) [Line Items]
Derivative maturity date	2017
Notional amount of terminated fair value hedge	$ 350
Net proceeds	8.4
Notional amount of terminated cash flow hedge	250
Deferred net losses within AOCI expected to be reclassified to earnings over the next twelve months	8.7
Swap Agreements [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Notional amount outstanding in swap agreements, cash flow hedges	750
Weighted average fixed rate of interest swaps	1.60%
Forward-Starting Swaps [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Notional amount outstanding in swap agreements, cash flow hedges	350
Effective date of swap agreement	December 31, 2013
Foreign Currency Contracts [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative maturity date	September 2013
Notional amount of foreign currency contracts designated as cash flow hedges	477
Notional amount of foreign currency contracts not designated as effective hedges	159
Commodity Contracts [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Notional amount of commodity-based derivatives not designated as effective hedges	18.8
7 1/2% Senior Subordinated Notes Due 2017 [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Debt principal related to terminated fair value hedge	$ 350
Interest rate of debt instrument	7.50%
Debt instrument maturity year	2017
Derivatives Not Designated As Effective Hedges [Member] | Foreign Currency Contracts [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative maturity date	December 2012
Effective Commencing December 31, 2013 [Member] | Forward-Starting Swaps [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Maturity date of swap agreements	December 31, 2015
Effective Commencing December 30, 2013 [Member] | Forward-Starting Swaps [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Maturity date of swap agreements	December 2015