Summary of Significant Accounting Policies - Recent Accounting Pronouncements (Details) - Designated as Hedging Instrument [Member] $ in Millions	3 Months Ended
Dec. 31, 2020 USD ($)
Interest Rate Swap [Member]
Derivative [Line Items]
Termination of derivative contract	$ 900.0
Forward Starting Interest Rate Swap [Member]
Derivative [Line Items]
Termination of derivative contract	$ 400.0

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.

Name:	us-gaap_DerivativeLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration