Condensed Consolidated Statements of Cash Flows (Parenthetical) - USD ($) $ in Millions	Sep. 30, 2020	Dec. 31, 2019	Sep. 30, 2019	Dec. 31, 2018
Statement of Cash Flows [Abstract]
Cash and cash equivalents	$ 16.0	$ 13.8	$ 13.2	$ 10.2

Amount classified as cash and cash equivalents attributable to disposal group held for sale or disposed of.

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Name:	us-gaap_DisposalGroupIncludingDiscontinuedOperationCashAndCashEquivalents
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant