Long-Term Debt - Effect of Derivative Instruments on Amounts Recognized in Other Comprehensive Earnings (Details) - Accumulated Net Gain (Loss) from Cash Flow Hedges Attributable to Parent [Member] - Interest Rate Swap - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments, Loss Recognized in Other Comprehensive Income (Loss), Effective Portion	$ 2.3	$ (0.2)	$ 6.6	$ 0.3
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net	$ 2.0	$ 4.0	$ 5.2	$ 7.9