Fair Value Of Financial Instruments (Narrative) (Details) (USD $) In Millions, unless otherwise specified									3 Months Ended		9 Months Ended
	Sep. 30, 2011	Dec. 31, 2010	Sep. 30, 2011 4.50% Senior Notes [Member]	Sep. 30, 2011 5.10% Senior Notes [Member]	Sep. 30, 2011 Other Accounts Receivable [Member]	Dec. 31, 2010 Other Accounts Receivable [Member]	Sep. 30, 2011 Accrued Expenses [Member]	Dec. 31, 2010 Accrued Expenses [Member]	Sep. 30, 2011 Other (Expenses) Income [Member]	Sep. 30, 2010 Other (Expenses) Income [Member]	Sep. 30, 2011 Other (Expenses) Income [Member]	Sep. 30, 2010 Other (Expenses) Income [Member]	Sep. 30, 2011 Other Net [Member]	Sep. 30, 2010 Other Net [Member]
Debt instrument, interest rate			4.50%	5.10%
Foreign currency forward contracts notional value	$ 194.8	$ 375.4
Fair value foreign currency forward contracts					0.1	0.5
Fair value foreign currency forward contracts							0.9	5.4
Cash settlements													0.1	(1.3)
Recognized gains (losses) of foreign currency forward contracts									(1.6)	4.6	4.1	2.2
Change in the fair value of foreign currency forward contracts													$ (4.1)	$ (2.2)