Sale of Receivables (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Sale of Receivables [Abstract]
Sale of receivables to financial institutions	$ 188.8	$ 183.9	$ 366.2	$ 334.3
Charge related to sale of receivables	$ 3.6	$ 3.9	$ 6.9	$ 7.1