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Property, Plant And Equipment (Schedule Of Property, Plant And Equipment) (Details) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020
Property, Plant and Equipment [Line Items]
Property Plant and Equipment	$ 25,171.3	$ 24,179.9
Accumulated Depreciation and Amortization	(7,289.5)	(7,560.4)
Net Property, Plant and Equipment	17,881.8	16,619.5
Gas Distribution Utility
Property, Plant and Equipment [Line Items]
Property Plant and Equipment	15,240.6	14,010.2
Accumulated Depreciation and Amortization	(3,490.2)	(3,292.9)
Electric Utility
Property, Plant and Equipment [Line Items]
Property Plant and Equipment	6,754.9	6,478.0
Accumulated Depreciation and Amortization	(2,433.1)	(2,305.0)
Common Utility
Property, Plant and Equipment [Line Items]
Property Plant and Equipment	217.8	197.3
Accumulated Depreciation and Amortization	(132.2)	(109.3)
Construction Work In Process
Property, Plant and Equipment [Line Items]
Property Plant and Equipment	808.0	572.6
Renewable Generation Assets
Property, Plant and Equipment [Line Items]
Property Plant and Equipment	702.4	175.7
Accumulated Depreciation and Amortization	(6.5)	(0.1)
Non-Utility And Other
Property, Plant and Equipment [Line Items]
Property Plant and Equipment	1,447.6	2,746.1
Accumulated Depreciation and Amortization	$ (1,227.5)	$ (1,853.1)

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Amount of accumulated depreciation, depletion and amortization for physical assets used in the normal conduct of business to produce goods and services.

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