Accounts and Notes Receivable and Credit Quality of Receivables - Components of Notes Receivable, Net (Details) - USD ($) $ in Millions	Jun. 30, 2018	Dec. 31, 2017	Jun. 30, 2017	Dec. 31, 2016
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total accounts and notes receivable, net	$ 733.8	$ 737.2
Notes receivable
Financing Receivable, Recorded Investment, Past Due [Line Items]
Notes receivable	194.2	217.1
Notes receivable allowance	(22.7)	(20.8)	$ (18.3)	$ (15.0)
Total accounts and notes receivable, net	171.5	196.3
Domestic | Notes receivable
Financing Receivable, Recorded Investment, Past Due [Line Items]
Notes receivable	75.4	93.5
Notes receivable allowance	(4.7)	(4.0)
International | Notes receivable
Financing Receivable, Recorded Investment, Past Due [Line Items]
Notes receivable	118.8	123.6
Notes receivable allowance	(18.0)	(16.8)
Balances over 90 days past due | Notes receivable
Financing Receivable, Recorded Investment, Past Due [Line Items]
Notes receivable over 90 days past due	38.3	42.4
Notes receivable allowance for balances over 90 days past due	(22.6)	(20.8)
Notes receivable, net, balances over 90 days past due	15.7	21.6
Balances over 90 days past due | Domestic | Notes receivable
Financing Receivable, Recorded Investment, Past Due [Line Items]
Notes receivable over 90 days past due	9.8	9.2
Notes receivable allowance for balances over 90 days past due	(4.6)	(4.0)
Balances over 90 days past due | International | Notes receivable
Financing Receivable, Recorded Investment, Past Due [Line Items]
Notes receivable over 90 days past due	28.5	33.2
Notes receivable allowance for balances over 90 days past due	$ (18.0)	$ (16.8)