Unaudited Condensed Consolidated Statements of Comprehensive Income (Parenthetical) (Parentheticals) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Net change in unrealized holding gains (losses) on available-for-sale securities, tax benefits	$ 0.3	$ 3.7	$ (0.8)	$ (0.1)
Net unrealized gains (losses) on cash flow hedges, tax provision (benefit)	37.2	(217.1)	106.1	(228.0)
Amortization of actuarial loss and prior service cost for postretirement plans and workers' compensation obligations, tax provision (benefit)	$ 4.0	$ 8.4	$ (2.2)	$ 16.7