Accounts and Notes Receivable and Credit Quality of Notes Receivable (Narrative) (Details) - USD ($) $ in Millions	9 Months Ended	12 Months Ended
	Sep. 30, 2015	Dec. 31, 2014
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts and notes receivable, net	$ 691.3	$ 744.6
Argentina
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts and notes receivable, net	19.1
Proceeds from collection of accounts and notes receivable, net	23.6
Mexico
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts and notes receivable, net	42.1
Proceeds from collection of accounts and notes receivable, net	$ 23.7
Minimum
Accounts, Notes, Loans and Financing Receivable [Line Items]
Receivable with imputed interest, effective yield (interest rate)	3.25%	4.00%
Maximum
Accounts, Notes, Loans and Financing Receivable [Line Items]
Receivable with imputed interest, effective yield (interest rate)	10.40%	10.40%
Notes receivable
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts and notes receivable, net	$ 220.7	$ 276.2
Financing receivable, percentage greater than 90 days past due	7.70%	5.90%