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Consolidated Statement of Financial Position (Parenthetical) - USD ($)
$ in Millions
Sep. 30, 2015
Dec. 31, 2014
Statement of Financial Position [Abstract]    
Allowance for receivables $ 12.9 $ 14.2
Common Stock, Authorized 450,000,000 450,000,000
Common Stock, Issued 137,506,040 136,624,157
Common Stock, Outstanding 137,506,040 136,624,157