Accounts and Notes Receivable and Credit Quality of Notes Receivable (Components of Total Notes Receivable, Net) (Details) - USD ($) $ in Millions	Sep. 30, 2015	Dec. 31, 2014	Sep. 30, 2014	Dec. 31, 2013
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total accounts and notes receivable, net	$ 691.3	$ 744.6
Notes receivable
Financing Receivable, Recorded Investment, Past Due [Line Items]
Notes receivable	232.1	282.1
Notes receivable allowance for doubtful accounts	(11.4)	(5.9)	$ (7.4)	$ (5.6)
Total accounts and notes receivable, net	220.7	276.2
Domestic | Notes receivable
Financing Receivable, Recorded Investment, Past Due [Line Items]
Notes receivable	63.1	95.3
Notes receivable allowance for doubtful accounts	(2.9)	0.0
International | Notes receivable
Financing Receivable, Recorded Investment, Past Due [Line Items]
Notes receivable	169.0	186.8
Notes receivable allowance for doubtful accounts	(8.5)	(5.9)
Financing Receivables, Equal to Greater than 90 Days Past Due | Notes receivable
Financing Receivable, Recorded Investment, Past Due [Line Items]
Notes receivable past due	22.9	19.9
Notes receivable allowance for doubtful accounts, balances over 90 days past due	(5.9)	(3.5)
Notes receivable, net, balances over 90 days past due	17.0	16.4
Financing Receivables, Equal to Greater than 90 Days Past Due | Domestic | Notes receivable
Financing Receivable, Recorded Investment, Past Due [Line Items]
Notes receivable past due	2.6	7.9
Notes receivable allowance for doubtful accounts, balances over 90 days past due	(1.5)	0.0
Financing Receivables, Equal to Greater than 90 Days Past Due | International | Notes receivable
Financing Receivable, Recorded Investment, Past Due [Line Items]
Notes receivable past due	20.3	12.0
Notes receivable allowance for doubtful accounts, balances over 90 days past due	$ (4.4)	$ (3.5)