Condensed Consolidated Statements of Comprehensive Income (Parenthetical) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Unrealized gain on available-for-sale securities, income taxes	$ 0	$ 0	$ 0.2	$ 0
Foreign currency transaction and translation adjustments, income taxes	94.4	53.2	(63.6)	36.9
Defined benefit plans adjustment, income taxes	$ 0.7	$ 0.9	$ 3.1	$ 2.5