Related Party Transactions (Details) - Equity affiliates - USD ($) $ in Millions	12 Months Ended
Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Related Party Transaction [Line Items]
Trade receivables(1)	$ 98.4	$ 220.2
Trade payables(2)	(121.8)	(200.0)
Net trade receivables/(payables)	(23.4)	20.2
Note receivables	140.9	153.9
Revenue	238.1	284.5	$ 413.5
Expenses	$ 141.4	$ 105.5	$ 53.4

Amount for accounts payable to related parties.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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-SubTopic 210
-Section S99
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