Accounts and Notes Receivable and Credit Quality of Notes Receivable - Components Accounts and Notes Receivable, Net (Details) - USD ($) $ in Millions	Sep. 30, 2016	Dec. 31, 2015
Current:
Accounts receivable	$ 478.3	$ 497.7
Notes receivable	143.6	180.4
Allowance for doubtful accounts and notes	(27.6)	(23.3)
Current accounts and notes receivable, net	594.3	654.8
Long-term:
Notes receivable, net of allowance of $0.2 and $0.3	43.6	51.3
Total accounts and notes receivable, net	637.9	706.1
Allowance for notes receivable	$ 0.2	$ 0.3