Accounts and Notes Receivable and Credit Quality of Notes Receivable - Evaluation of Notes Receivable For Impairment (Details) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Dec. 31, 2015
Allowance for notes receivable
Total accounts and notes receivable, net	$ 637.9		$ 706.1
Notes receivable
Notes receivable:
Notes Receivable, Ending Balance Individually Evaluated for Impairment	89.3		122.5
Notes Receivable, Ending Balance Collectively Evaluated for Impairment	98.1		109.7
Notes Receivable	187.4		232.2
Allowance for notes receivable
Allowance for Notes Receivable, Ending Balance Individually Evaluated for Impairment	(14.6)		(12.9)
Allowance for Notes Receivable, Ending Balance Collectively Evaluated for Impairment	(0.2)		(0.3)
Total Allowance for Notes Receivable, as of period end	(14.8)		(13.2)
Total Notes Receivable, Ending Balance Individually Evaluated for Impairment, Net	74.7		109.6
Total Notes Receivable, Ending Balance Collectively Evaluated for Impairment, Net	97.9		109.4
Total accounts and notes receivable, net	172.6		219.0
Provision, Ending Balance Individually Evaluated for Impairment	(3.8)	$ (6.2)
Provision, Ending Balance Collectively Evaluated for Impairment	0.0	(1.7)
Total Provision, as of period end	(3.8)	(7.9)
Charge-offs and Recoveries, Ending Balance Individually Evaluated for Impairment	2.1	2.3
Charge-offs and Recoveries, Ending Balance Collectively Evaluated for Impairment	0.1	0.1
Total Charge-offs and Recoveries, as of period end	2.2	$ 2.4
Domestic | Notes receivable
Notes receivable:
Notes Receivable, Ending Balance Individually Evaluated for Impairment	10.4		20.7
Notes Receivable, Ending Balance Collectively Evaluated for Impairment	24.1		41.7
Notes Receivable	34.5		62.4
Allowance for notes receivable
Total Allowance for Notes Receivable, as of period end	(1.1)		(2.6)
International | Notes receivable
Notes receivable:
Notes Receivable, Ending Balance Individually Evaluated for Impairment	78.9		101.8
Notes Receivable, Ending Balance Collectively Evaluated for Impairment	74.0		68.0
Notes Receivable	152.9		169.8
Allowance for notes receivable
Total Allowance for Notes Receivable, as of period end	$ (13.7)		$ (10.6)