Accumulated Other Comprehensive Income (Loss) Reclassification Adjustments (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Interest Expense	$ 48.0	$ 50.9
Total reclassifications for the period	11.3	0.0
Reclassification out of Accumulated Other Comprehensive Income [Member]
Defined Benefit Plan, Amortization of Prior Service Cost (Credit)	6.8	(0.5)
Accumulated Defined Benefit Plans Adjustment, Net Gain (Loss) Attributable to Parent [Member] | Reclassification out of Accumulated Other Comprehensive Income [Member]
Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss), Reclassification Adjustment from AOCI, Tax	3.5	(0.3)
Accumulated Net Gain (Loss) from Interest Rate Hedge [Member] | Reclassification out of Accumulated Other Comprehensive Income [Member]
Interest Expense	$ (4.5)	$ (0.5)