Financial Instruments (Fair Value of Derivative Instruments) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended	9 Months Ended									3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2013	Sep. 30, 2013 Other Current Assets [Member]	Dec. 31, 2012 Other Current Assets [Member]	Sep. 30, 2013 Other Assets [Member]	Dec. 31, 2012 Other Assets [Member]	Sep. 30, 2013 Other Current Liabilities [Member]	Dec. 31, 2012 Other Current Liabilities [Member]	Sep. 30, 2013 Other Liabilities [Member]	Dec. 31, 2012 Other Liabilities [Member]	Sep. 30, 2013 Operating Expense [Member]	Sep. 30, 2012 Operating Expense [Member]	Sep. 30, 2013 Operating Expense [Member]	Sep. 30, 2012 Operating Expense [Member]
Derivative Instruments, Gain (Loss) Recognized in Other Comprehensive Income (Loss), Effective Portion, Net											$ (13.5)	$ 14.0	$ (53.0)	$ 30.0
Derivative Instruments, Gain Reclassified from Accumulated OCI into Income, Effective Portion	(3.7)	2.0									(3.7)	4.3	2.0	10.0
Forward exchange contracts and options designated as hedging instruments, assets			6.4	16.4	1.3	11.6
Forward exchange contracts and options designated as hedging instruments, liabilities							$ 21.6	$ 6.0	$ 22.6	$ 3.5