Consolidated Balance Sheets - USD ($) $ in Millions	Dec. 31, 2023	Dec. 31, 2022
Current assets:
Cash and cash equivalents	$ 86.6	$ 21.4
Restricted cash and equivalents	6.4	5.6
Accounts receivable, net	350.3	508.2
Materials, supplies and fuel	160.9	207.4
Derivative assets, current	0.0	0.6
Income tax receivable, net	18.5	17.6
Regulatory assets, current	175.7	260.3
Other current assets	28.2	50.6
Total current assets	826.6	1,071.7
Property, plant and equipment	8,917.2	8,374.8
Less accumulated depreciation and depletion	(1,797.9)	(1,576.8)
Total property, plant and equipment, net	7,119.3	6,798.0
Other assets:
Goodwill	1,299.5	1,299.5
Intangible assets, net	8.4	9.6
Regulatory assets, non-current	304.4	392.7
Other assets, non-current	62.2	46.7
Total other assets, non-current	1,674.5	1,748.5
TOTAL ASSETS	9,620.4	9,618.2
Current liabilities:
Accounts payable	186.4	310.0
Accrued liabilities	293.3	243.5
Derivative liabilities, current	6.5	6.6
Regulatory liabilities, current	98.9	46.0
Notes payable	0.0	535.6
Current maturities of long-term debt	600.0	525.0
Total current liabilities	1,185.1	1,666.7
Long-term debt, net of current maturities	3,801.2	3,607.3
Deferred credits and other liabilities:
Deferred income tax liabilities, net	548.0	508.9
Regulatory liabilities, non-current	467.7	472.6
Benefit plan liabilities	123.9	116.7
Other deferred credits and other liabilities	188.7	156.1
Total deferred credits and other liabilities	1,328.3	1,254.3
Commitments, contingencies and guarantees (Note 3)
Equity:
Common stock $1.00 par value; 100,000,000 shares authorized; issued: 68,265,042 and 66,140,396, respectively	68.3	66.1
Additional paid-in capital	2,007.7	1,882.7
Retained earnings	1,158.2	1,064.1
Treasury stock at cost - 68,073 and 36,726, respectively	(4.1)	(2.4)
Accumulated other comprehensive income (loss)	(14.8)	(15.6)
Total stockholders’ equity	3,215.3	2,994.9
Non-controlling interest	90.5	95.0
Total equity	3,305.8	3,089.9
TOTAL LIABILITIES AND TOTAL EQUITY	$ 9,620.4	$ 9,618.2

Carrying value as of the balance sheet date of liabilities incurred (and for which invoices have typically been received) and payable to vendors for goods and services received that are used in an entity's business. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

Name:	us-gaap_AccountsPayableCurrent
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount, after allowance for credit loss, of right to consideration from customer for product sold and service rendered in normal course of business, classified as current.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 310
-SubTopic 10
-Name Accounting Standards Codification
-Section 45
-Paragraph 2
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481990/310-10-45-2

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 310
-SubTopic 10
-Name Accounting Standards Codification
-Section 45
-Paragraph 9
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481990/310-10-45-9