Derivative Financial Instruments (Summary of Amount of Gain (Loss) Recognized in Accumulated Other Comprehensive Income) (Details) - Derivatives in Cash Flow Hedging Relationships [Member] - Interest Rate Swap Contracts [Member] - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Derivative Instruments Gain Loss [Line Items]
Amount of Gain Recognized in AOCI	$ 16.3	$ 7.0
Interest Expense [Member]
Derivative Instruments Gain Loss [Line Items]
Gain reclassified from AOCI into net earnings	$ 2.1	$ 1.9