Selected Balance Sheet Data (Details) - USD ($) $ in Millions	Sep. 30, 2020	Dec. 31, 2019
Accounts receivable, net
Accounts receivable	$ 350.6	$ 324.9
Less allowance for bad debts	(25.7)	(21.0)
Accounts receivable, net	$ 324.9	$ 303.9

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
-Publisher FASB
-Name Accounting Standards Codification
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Reference 2: http://www.xbrl.org/2003/role/disclosureRef
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-Name Accounting Standards Codification
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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant