Derivative Instruments and Hedging Activities (Schedule of Interest Rate Contracts) (Details) - Designated as Hedging Instrument - Interest Rate Swap $ in Millions	Sep. 30, 2020 USD ($)
Derivative [Line Items]
Derivative, notional amount	$ 450.0
Derivative, notional amount	$ 1,300.0
Minimum
Derivative [Line Items]
Derivative, fixed interest rate	2.60%
Minimum
Derivative [Line Items]
Derivative, fixed interest rate	2.37%
Maximum
Derivative [Line Items]
Derivative, fixed interest rate	2.79%
Maximum
Derivative [Line Items]
Derivative, fixed interest rate	2.83%