Related Party Transactions (Details) - Director [Member] - Methvin Company [Member] - USD ($) $ in Millions	3 Months Ended	6 Months Ended
Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018	Dec. 31, 2018
Related Party Transaction [Line Items]
Related Party Transaction, Other Revenues from Transactions with Related Party	$ 7.0	$ 4.6	$ 14.3	$ 8.4
Accounts Receivable, Related Parties, Current	2.0		$ 2.0		$ 1.9
Related Party Transaction, Amounts of Transaction	$ 0.2

Amount of receivables arising from transactions with related parties due within one year or the normal operating cycle, if longer.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant