Valuation and Qualifying Accounts - Allowance for Uncollectible Accounts Receivable (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013		Dec. 31, 2012		Dec. 31, 2011
Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at beginning of period	$ 59.0		$ 55.4		$ (63.1)
Charges to costs and expenses	12.6		16.3		10.4
Reversals to other accounts	0.7	[1]	(0.2)	[1]	(0.5)	[1]
Deductions:
Dispositions	0		(0.4)		0
Uncollectible accounts written off	(7.2)		(12.6)		(16.3)
Foreign currency translation adjustment	(0.2)		0.5		(1.3)
Balance at end of period	$ 64.9		$ 59.0		$ 55.4

[1] Amounts primarily relate to miscellaneous other amounts and reclassifications.