Fair Value Measurements and Derivative Instruments - Credit Features (Details) $ in Millions	Sep. 30, 2021 USD ($) derivative
Derivative Instruments
Number of interest rate derivative hedges requiring collateral to be posted \| derivative	7
Debt instrument, collateral amount	$ 162.3
Interest Contracts
Derivative Instruments
Debt instrument, collateral amount	$ 65.6

Amount of assets pledged to secure a debt instrument.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 470
-Section 50
-Paragraph 3
-Subparagraph (d)
-URI http://asc.fasb.org/extlink&oid=123599511&loc=d3e64711-112823

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