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Consolidated Balance Sheets - USD ($)
$ in Millions
Mar. 31, 2024
Dec. 31, 2023
Current assets:    
Cash and cash equivalents $ 123.0 $ 86.6
Restricted cash and equivalents 6.7 6.4
Accounts receivable, net 334.4 350.3
Materials, supplies and fuel 130.6 160.9
Income tax receivable, net 18.2 18.5
Regulatory assets, current 147.3 175.7
Other current assets 37.4 28.2
Total current assets 797.6 826.6
Property, plant and equipment 9,068.4 8,917.2
Less accumulated depreciation (1,845.3) (1,797.9)
Total property, plant and equipment, net 7,223.1 7,119.3
Other assets:    
Goodwill 1,299.5 1,299.5
Intangible assets, net 8.4 8.4
Regulatory assets, non-current 283.8 304.4
Other assets, non-current 64.3 62.2
Total other assets, non-current 1,656.0 1,674.5
TOTAL ASSETS 9,676.7 9,620.4
Current liabilities:    
Accounts payable 132.6 186.4
Accrued liabilities 263.9 293.3
Derivative liabilities, current 2.0 6.5
Regulatory liabilities, current 89.9 98.9
Notes payable 0.0 0.0
Current maturities of long-term debt 600.0 600.0
Total current liabilities 1,088.4 1,185.1
Long-term debt, net of current maturities 3,802.8 3,801.2
Deferred credits and other liabilities:    
Deferred income tax liabilities, net 576.1 548.0
Regulatory liabilities, non-current 463.5 467.7
Benefit plan liabilities 124.1 123.9
Other deferred credits and other liabilities 199.3 188.7
Total deferred credits and other liabilities 1,363.0 1,328.3
Commitments, contingencies and guarantees (Note 3)
Equity:    
Common stock $1 par value; 100,000,000 shares authorized; issued 68,969,578 and 68,265,042 shares, respectively 69.0 68.3
Additional paid-in capital 2,040.2 2,007.7
Retained earnings 1,241.7 1,158.2
Treasury stock, at cost - 82,343 and 68,073 shares, respectively (4.7) (4.1)
Accumulated other comprehensive income (loss) (12.3) (14.8)
Total stockholders’ equity 3,333.9 3,215.3
Non-controlling interest 88.6 90.5
Total equity 3,422.5 3,305.8
TOTAL LIABILITIES AND TOTAL EQUITY $ 9,676.7 $ 9,620.4