Income Taxes (Details 4) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Reconciliation of the beginning and ending amount of unrecognized tax benefits
Balance at beginning of year	$ 101.2	$ 93.5	$ 75.0
Additions based on tax positions related to the current year	14.6	15.9	7.3
Additions for tax positions of prior years	5.2	18.3	14.4
Reductions for tax positions of prior years	(17.3)	(24.3)	(2.2)
Settlements	(0.9)	0	(0.4)
Statute expirations	(0.6)	(2.2)	(0.6)
Balance at end of year	102.2	101.2	93.5
Net unrecognized tax benefit that would affect the effective tax rate	74.7	63.0	49.9
Interest and penalties liability increase	3.5	1.9
Unrecognized tax benefits, interest and penalties liability	16.8
Resolution of federal income tax refund claims of research and experimentation credits		16.0
Resolution of federal income tax refund claims of domestic manufacturing deduction	16.1	2.3
U.S. government
Significant Change in Unrecognized Tax Benefits is Reasonably Possible [Line Items]
Uncertain tax positions that may reverse in 2014	$ 30.0