Accounts and Notes Receivable and Credit Quality of Notes Receivable (Narrative) (Details) - USD ($) $ in Millions	6 Months Ended	12 Months Ended
	Jun. 30, 2015	Dec. 31, 2014
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts and notes receivable, net	$ 713.5	$ 744.6
Argentina
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts and notes receivable, net	18.9
Proceeds from collection of accounts and notes receivable, net	15.6
Mexico
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts and notes receivable, net	44.2
Proceeds from collection of accounts and notes receivable, net	$ 14.6
Minimum
Accounts, Notes, Loans and Financing Receivable [Line Items]
Receivable with imputed interest, effective yield (interest rate)	4.00%	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	$ 228.3	$ 276.2
Financing receivable, percentage greater than 90 days past due	5.40%	5.90%