XML 145 R129.htm IDEA: XBRL DOCUMENT v3.22.0.1
Segments Of Business (Schedule Of Operating Income Derived From Revenues And Expenses By Segment) (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Segment Reporting Information [Line Items]      
Operating Revenues $ 4,899.6 $ 4,681.7 $ 5,208.9
Operating Income 1,006.9 550.8 890.7
Consolidated Depreciation and Amortization 748.4 725.9 717.4
Consolidated Assets 24,156.9 22,040.5 22,659.8
Payments to Acquire Property Plant and Equipment Including Captial Expenditures From Current Liabilities And Equity Method Investments 1,940.4 1,720.8 1,867.8
Disposal Group, Not Discontinued Operation, Loss (Gain) on Write-down   412.4  
Gas Distribution Operations      
Segment Reporting Information [Line Items]      
Operating Revenues 3,171.2 3,128.1 3,509.7
Intersegment 3,183.5 3,140.2 3,522.8
Operating Income 617.5 199.1 675.4
Consolidated Depreciation and Amortization 383.0 363.1 403.2
Consolidated Assets 15,153.7 13,433.0 14,224.5
Payments to Acquire Property Plant and Equipment Including Captial Expenditures From Current Liabilities And Equity Method Investments 1,406.4 1,266.9 1,380.3
Electric Operations      
Segment Reporting Information [Line Items]      
Operating Revenues 1,696.3 1,535.9 1,698.4
Intersegment 1,697.1 1,536.6 1,699.2
Operating Income 387.8 348.8 406.8
Consolidated Depreciation and Amortization 329.4 321.3 277.3
Consolidated Assets 7,178.9 6,443.1 6,027.6
Payments to Acquire Property Plant and Equipment Including Captial Expenditures From Current Liabilities And Equity Method Investments 517.4 422.8 468.9
Corporate and Other      
Segment Reporting Information [Line Items]      
Operating Revenues 32.1 17.7 0.8
Intersegment 492.4 467.5 468.9
Operating Income 1.6 2.9 (191.5)
Consolidated Depreciation and Amortization 36.0 41.5 36.9
Consolidated Assets 1,824.3 2,164.4 2,407.7
Payments to Acquire Property Plant and Equipment Including Captial Expenditures From Current Liabilities And Equity Method Investments 16.6 31.1 18.6
Unaffiliated | Gas Distribution Operations      
Segment Reporting Information [Line Items]      
Operating Revenues 3,171.2 3,128.1 3,509.7
Unaffiliated | Electric Operations      
Segment Reporting Information [Line Items]      
Operating Revenues 1,696.3 1,535.9 1,698.4
Unaffiliated | Corporate and Other      
Segment Reporting Information [Line Items]      
Operating Revenues 32.1 17.7 0.8
Intersegment | Gas Distribution Operations      
Segment Reporting Information [Line Items]      
Intersegment 12.3 12.1 13.1
Intersegment | Electric Operations      
Segment Reporting Information [Line Items]      
Intersegment 0.8 0.7 0.8
Intersegment | Corporate and Other      
Segment Reporting Information [Line Items]      
Intersegment 460.3 449.8 468.1
Eliminations      
Segment Reporting Information [Line Items]      
Intersegment $ (473.4) $ (462.6) $ (482.0)