Fair Value Measurements Non-recurring measurement input (Details)	Dec. 31, 2019	Sep. 30, 2018
Terminal capitalization rate [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Measurement input	12.00%	10.00%
Discount rate [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Measurement input	13.00%	10.00%

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

No definition available.

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Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration