Accounts and Notes Receivable and Credit Quality of Notes Receivable - Evaluation of Notes Receivable For Impairment (Details) - Notes receivable - USD ($) $ in Millions	Mar. 31, 2016	Dec. 31, 2015
Financing Receivable, Recorded Investment, Past Due [Line Items]
Notes receivable	$ 222.2	$ 232.2
Ending Balance Individually Evaluated for Impairment	95.4	122.5
Ending Balance Collectively Evaluated for Impairment	126.8	109.7
Domestic
Financing Receivable, Recorded Investment, Past Due [Line Items]
Notes receivable	52.3	62.4
Ending Balance Individually Evaluated for Impairment	16.3	20.7
Ending Balance Collectively Evaluated for Impairment	36.0	41.7
International
Financing Receivable, Recorded Investment, Past Due [Line Items]
Notes receivable	169.9	169.8
Ending Balance Individually Evaluated for Impairment	79.1	101.8
Ending Balance Collectively Evaluated for Impairment	$ 90.8	$ 68.0