Condensed Consolidated Statement of Comprehensive Income (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Net income	$ 100.0	$ 96.9	$ 338.2	$ 268.6
Other comprehensive income (loss), net of tax and reclassifications to earnings:
Unrealized holding gains (losses) on available-for-sale securities	(9.5)	(22.3)	(59.4)	40.7
Unrealized gains on cash flow hedges	0	0.5	0.4	1.2
Foreign currency translation adjustments	(5.2)	7.8	(3.1)	2.4
Other comprehensive income (loss)	(14.7)	(14.0)	(62.1)	44.3
Comprehensive income	$ 85.3	$ 82.9	$ 276.1	$ 312.9