Condensed Consolidated Statement of Comprehensive Income (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Net income	$ 100.4	$ 93.2
Other comprehensive income (loss), net of tax and reclassifications to earnings:
Unrealized holding gains (losses) on available-for-sale securities	(41.4)	37.9
Unrealized gains on cash flow hedges	0.2	0.4
Foreign currency translation adjustments	0.4	(4.4)
Other comprehensive income (loss)	(40.8)	33.9
Comprehensive income	$ 59.6	$ 127.1