Basis of Financial Statement Presentation Capitalized software and cloud-computing arrangements (Details) $ in Millions	Sep. 30, 2019 USD ($)
Capitalized Hosting Arrangement Costs [Abstract]
Hosting Arrangement, Service Contract, Implementation Cost, Capitalized, after Accumulated Amortization	$ 4.5

Amount, after accumulated amortization, of capitalized implementation cost from hosting arrangement that is service contract.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 360
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 40
-Section 50
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=118198657&loc=SL118198666-228104

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