Sale of Receivables (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Sale of Receivables [Abstract]
Sale of receivables to financial institutions	$ 174.9	$ 193.8	$ 541.1	$ 528.1
Charge related to sale of receivables	$ 3.3	$ 3.9	$ 10.2	$ 11.0