Income Taxes - Unrecognized Tax Benefits (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012
Reconciliation of the total gross unrecognized tax benefits
Balance, January 1	$ 25.8	$ 26.2
Additions based on tax positions related to current year	1.7	2.0
Additions for tax positions of prior years	12.5	13.4
Reductions for closure of tax audits and settlements	(17.7)	(14.6)
Reductions for lapse in statute of limitations	(0.2)	(1.7)
Translation adjustment	0.8	0.5
Balance, December 31	22.9	25.8
Unrecognized tax benefits that would impact effective tax rate	15.7
Income tax penalties and interest expense	1.0	0.5
Income tax penalties and interest accrued on unrecognized tax benefits	8.4	8.3
Non-U.S. Tax Jurisdiction
Reconciliation of the total gross unrecognized tax benefits
Reductions for closure of tax audits and settlements	$ (14.9)