CONSOLIDATED CONDENSED STATEMENTS OF COMPREHENSIVE INCOME (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
CONSOLIDATED CONDENSED STATEMENTS OF COMPREHENSIVE INCOME
Net income	$ 76.9	$ 69.2	$ 315.9	$ 202.1
Other comprehensive income (loss), net of tax (Note 13)
Foreign currency translation adjustments	18.9	23.5	(0.7)	(0.6)
Unrealized (loss) gain on cash flow hedges	(13.3)	(9.8)	(3.4)	0.4
Unrealized (loss) gain on available-for-sale investments	(0.5)	0.2	(0.9)	0.3
Reclassification of net realized investment loss to earnings				0.3
Other comprehensive income (loss)	5.1	13.9	(5.0)	0.4
Comprehensive income	$ 82.0	$ 83.1	$ 310.9	$ 202.5