Revenue from Contracts with Customers, Contract Balances (Details) - USD ($) $ in Millions	Jun. 30, 2019	Dec. 31, 2018
Contract with Customer, Asset and Liability [Abstract]
Accounts receivable	$ 498.6	$ 525.4
Contract assets	26.0	19.6
Contract liabilities	$ 60.6	$ 69.6

Amount, after allowance for credit loss, of right to consideration from customer for product sold and service rendered in normal course of business, classified as current.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant