Amount of consideration transferred, consisting of acquisition-date fair value of assets transferred by the acquirer, liabilities incurred by the acquirer, and equity interest issued by the acquirer.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
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Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
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Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

Acquisitions - Other Acquisitions (Details) $ in Millions	3 Months Ended			6 Months Ended
Acquisitions - Other Acquisitions (Details) $ in Millions	Mar. 31, 2020 USD ($)	Jun. 30, 2019 USD ($) item	Mar. 31, 2019 item	Jun. 30, 2019 USD ($)
Acquisitions
Number of acquisitions \| item		1	1
Total purchase price				$ 2.6
Walker
Acquisitions
Total purchase price		$ 235.4
Starr
Acquisitions
Total purchase price	$ 41.6