Income Taxes (Contingencies) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Balance at January 1	$ 6.8	$ 6.4	$ 6.9
Additions based on tax positions related to the current year	0	0	0
Additions for tax positions of prior years	0.8	0.5	0.9
Reductions for tax positions of prior years	(0.2)	0	0
Reductions for expirations of statute of limitations	(2.2)	0	0
Settlements	(0.4)	(0.1)	(1.4)
Balance at December 31	4.8	6.8	6.4
Unrecognized tax benefits, accumulated interest and penalties	5.1	4.5	4.0
Deferred tax assets related to unrecognized tax benefits	3.6	5.5	5.2
Net unrecognized tax benefits, associated interest, penalties and deferred tax asset that if resolved would impact effective tax rate	6.3	5.8	5.2
Recognized interest and penalties	$ 0.4	$ 0.3	$ 0.3