NiSource (NI) 10-Q 3 Aug 22 2022 Q2 Quarterly report Financial data

Document And Entity Information

Document And Entity Information - shares	6 Months Ended
	Jun. 30, 2022	Jul. 26, 2022
Document Information [Line Items]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Jun. 30, 2022
Document Transition Report	false
Entity File Number	001-16189
Entity Registrant Name	NiSource Inc.
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	35-2108964
Entity Address, Address Line One	801 East 86th Avenue
Entity Address, City or Town	Merrillville,
Entity Address, State or Province	IN
Entity Address, Postal Zip Code	46410
City Area Code	(877)
Local Phone Number	647-5990
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Emerging Growth Company	false
Entity Small Business	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		405,952,999
Entity Central Index Key	0001111711
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2022
Document Fiscal Period Focus	Q2
Amendment Flag	false
Series A Corporate Units
Document Information [Line Items]
Title of 12(b) Security	Series A Corporate Units
Trading Symbol	NIMC
Security Exchange Name	NYSE
Common Stock
Document Information [Line Items]
Title of 12(b) Security	Common Stock, par value $0.01 per share
Trading Symbol	NI
Security Exchange Name	NYSE
Preferred Stock
Document Information [Line Items]
Title of 12(b) Security	Depositary Shares, each representing a 1/1,000th ownership interest in a share of 6.50% Series B Fixed-Rate Reset Cumulative Redeemable Perpetual
Trading Symbol	NI PR B
Security Exchange Name	NYSE

Statements Of Consolidated Inco

Statements Of Consolidated Income (Loss) - USD ($) shares in Millions, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Operating Revenues
Customer revenues	$ 1,156.5	$ 952.4	$ 2,996.8	$ 2,458.9
Other revenues	26.7	33.6	59.7	72.7
Total Operating Revenues	1,183.2	986	3,056.5	2,531.6
Operating Expenses
Cost of energy	383.7	228.3	1,090.4	705.1
Operation and maintenance	381.9	362.8	776.2	724.3
Depreciation and amortization	208.7	186.3	401.4	371.3
Loss (gain) on sale of assets, net	0	(0.1)	(105)	8
Other taxes	65.6	66.5	149.9	147.5
Operating Costs and Expenses	1,039.9	843.8	2,312.9	1,956.2
Operating Income	143.3	142.2	743.6	575.4
Other Income (Deductions)
Interest expense, net	(84.5)	(84.5)	(168.2)	(169.1)
Other, net	9	12.4	19.9	22.9
Total Other Deductions, Net	(75.5)	(72.1)	(148.3)	(146.2)
Income before Income Taxes	67.8	70.1	595.3	429.2
Income Taxes	12	13.2	108.2	75.8
Net Income	55.8	56.9	487.1	353.4
Net loss attributable to noncontrolling interest	(11.2)	(3.4)	(6.7)	(2.4)
Net Income Attributable to NiSource	67	60.3	493.8	355.8
Preferred dividends	(13.8)	(13.8)	(27.6)	(27.6)
Net Income Available to Common Shareholders	$ 53.2	$ 46.5	$ 466.2	$ 328.2
Earnings Per Share
Basic Earnings Per Share	$ 0.13	$ 0.12	$ 1.15	$ 0.84
Diluted Earnings Per Share	$ 0.12	$ 0.11	$ 1.06	$ 0.80
Basic Average Common Shares Outstanding	406.4	393	406.2	392.8
Diluted Average Common Shares	440.2	422.9	440.8	408.5

Statements of Consolidated Comp

Statements of Consolidated Comprehensive Income (Loss) - USD ($) $ in Millions		3 Months Ended		6 Months Ended
		Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Net Income		$ 55.8	$ 56.9	$ 487.1	$ 353.4
Other comprehensive income:
Net unrealized loss on available-for-sale securities	[1]	(3.9)	0.9	(9.6)	(1.6)
Net unrealized gain (loss) on cash flow hedges	[2]	56	(49.8)	103	34.8
Unrecognized pension and OPEB benefit (costs)	[3]	(2.5)	0.8	(2.4)	(0.1)
Total other comprehensive income (loss)		49.6	(48.1)	91	33.1
Comprehensive Income		$ 105.4	$ 8.8	$ 578.1	$ 386.5
[1]Net unrealized gain (loss) on available-for-sale debt securities, net of $1.1 million tax benefit and $0.3 million tax expense in the second quarter of 2022 and 2021, respectively and $2.6 million and $0.4 million tax benefit for the six months ended 2022 and 2021, respectively.[2]Net unrealized gain (loss) on cash flow hedges, net of $12.8 million tax expense and $16.5 million tax benefit in the second quarter of 2022 and 2021, respectively, and $34.1 million and $11.5 million tax expense for the six months ended 2022 and 2021, respectively.[3]Unrecognized pension and OPEB benefit (costs), net of $0.8 million tax benefit and $0.2 million tax expense in the second quarter of 2022 and 2021, respectively, and $0.8 million tax benefit and $1.1 million tax expense for the six months ended 2022 and 2021, respectively.

Statements of Consolidated Co_2

Statements of Consolidated Comprehensive Income (Loss) (Parenthetical) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Other Comprehensive Income (Loss), Securities, Available-for-Sale, Unrealized Holding Gain (Loss) Arising During Period, Tax	$ (1.1)	$ 0.3	$ (2.6)	$ (0.4)
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), after Reclassification, Tax	12.8	(16.5)	34.1	11.5
Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, Tax	$ 0.8	$ (0.2)	$ 0.8	$ (1.1)

Statements of Consolidated Bala

Statements of Consolidated Balance Sheets - USD ($) $ in Millions	Jun. 30, 2022		Dec. 31, 2021
Property, Plant and Equipment
Plant	$ 26,046.1		$ 25,171.3
Accumulated depreciation and amortization	(7,534.4)		(7,289.5)
Net Property, Plant and Equipment	18,511.7	[1]	17,881.8
Investments and Other Assets
Unconsolidated affiliates	0.8		0.8
Available-for-sale debt securities (amortized cost of $160.2 and $169.3, allowance for credit losses of $1.0 and $0.2, respectively)	149.8		171.8
Other investments	73.5		87.1
Total Investments and Other Assets	224.1		259.7
Current Assets
Cash and cash equivalents	77.8		84.2
Restricted Cash	21.7		10.7
Accounts receivable	740.7		849.1
Allowance for credit losses	(26.1)		(23.5)
Accounts receivable, net	714.6		825.6
Gas inventory	307.5		327.4
Materials and supplies, at average cost	142.9		139.1
Electric production fuel, at average cost	41.2		32.2
Exchange gas receivable	134.6		99.6
Regulatory assets	179.7		206.2
Prepayments and other	291.7		195.8
Total Current Assets	1,911.7	[1]	1,920.8
Other Assets
Regulatory assets	2,308.8		2,286
Goodwill	1,485.9		1,485.9
Deferred charges and other	371.6		322.7
Total Other Assets	4,166.3		4,094.6
Total Assets	24,813.8		24,156.9
Stockholders' Equity
Common stock - $0.01 par value, 600,000,000 shares authorized; 405,878,297 and 405,303,023 shares outstanding, respectively	4.1		4.1
Preferred stock - $0.01 par value, 20,000,000 shares authorized; 1,302,500 shares outstanding	1,546.5		1,546.5
Treasury stock	(99.9)		(99.9)
Additional paid-in capital	7,218.6		7,204.3
Retained deficit	(1,408.9)		(1,580.9)
Accumulated other comprehensive loss	(35.8)		(126.8)
Total NiSource Stockholders’ Equity	7,224.6		6,947.3
Noncontrolling interest in consolidated subsidiaries	315.8		325.6
Total Equity	7,540.4		7,272.9
Long-term debt, excluding amounts due within one year	9,520.2		9,183.4
Total Capitalization	17,060.6		16,456.3
Current Liabilities
Current portion of long-term debt	37.3		58.1
Short-term borrowings	555		560
Accounts payable	650.3		697.8
Dividends payable - common stock	95.4		0
Dividends payable - preferred stock	8.2		0
Customer deposits and credits	184.7		237.9
Taxes accrued	232.3		277.1
Interest accrued	124.4		105.5
Exchange gas payable	91.2		107.7
Regulatory liabilities	300.4		137.4
Accrued compensation and employee benefits	142.9		182.7
Other accruals	592.9		382
Total Current Liabilities	3,015	[2]	2,746.2
Other Liabilities
Deferred income taxes	1,830.9		1,659.4
Accrued liability for postretirement and postemployment benefits	280.5		292.5
Regulatory liabilities	1,833		1,842.6
Asset retirement obligations	464.1		469.7
Other noncurrent liabilities	329.7		690.2
Total Other Liabilities	4,738.2	[2]	4,954.4
Total Capitalization and Liabilities	24,813.8		24,156.9
Joint Ventures
Property, Plant and Equipment
Net Property, Plant and Equipment	684.6		695.9
Current Assets
Total Current Assets	20.4		14.3
Current Liabilities
Total Current Liabilities	7.5		10
Other Liabilities
Total Other Liabilities	$ 20.8		$ 20.5
[1]Includes $684.6 million and $695.9 million at June 30, 2022 and December 31, 2021, respectively, of net property, plant and equipment assets and $20.4 million and $14.3 million at June 30, 2022 and December 31, 2021, respectively, of current assets of consolidated VIEs that may be used only to settle obligations of the consolidated VIEs. Refer to Note 12, "Variable Interest Entities" for additional information.[2]Includes $7.5 million and $10.0 million at June 30, 2022 and December 31, 2021, respectively, of current liabilities and $20.8 million and $20.5 million at June 30, 2022 and December 31, 2021, respectively, of other liabilities of consolidated VIEs that creditors do not have recourse to our general credit. Refer to Note 12, "Variable Interest Entities," for additional information.

Statements of Consolidated Ba_2

Statements of Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Millions	Jun. 30, 2022		Dec. 31, 2021
Amortized Cost	$ 160.2		$ 169.3
Allowance for Credit Loss	$ 1		$ 0.2
Common Stock, Par or Stated Value Per Share	$ 0.01		$ 0.01
Common Stock, Shares Authorized	600,000,000		600,000,000
Common Stock, Shares, Outstanding	405,878,297		405,303,023
Preferred Stock, Par or Stated Value Per Share	$ 0.01		$ 0.01
Preferred Stock, Shares Authorized	20,000,000		20,000,000
Preferred Stock, Shares Outstanding	1,302,500		1,302,500
Public Utilities, Property, Plant and Equipment, Net	$ 18,511.7	[1]	$ 17,881.8
Current assets	1,911.7	[1]	1,920.8
Current liabilities	3,015	[2]	2,746.2
Other Liabilities	4,738.2	[2]	4,954.4
Joint Ventures
Public Utilities, Property, Plant and Equipment, Net	684.6		695.9
Current assets	20.4		14.3
Current liabilities	7.5		10
Other Liabilities	$ 20.8		$ 20.5
[1]Includes $684.6 million and $695.9 million at June 30, 2022 and December 31, 2021, respectively, of net property, plant and equipment assets and $20.4 million and $14.3 million at June 30, 2022 and December 31, 2021, respectively, of current assets of consolidated VIEs that may be used only to settle obligations of the consolidated VIEs. Refer to Note 12, "Variable Interest Entities" for additional information.[2]Includes $7.5 million and $10.0 million at June 30, 2022 and December 31, 2021, respectively, of current liabilities and $20.8 million and $20.5 million at June 30, 2022 and December 31, 2021, respectively, of other liabilities of consolidated VIEs that creditors do not have recourse to our general credit. Refer to Note 12, "Variable Interest Entities," for additional information.

Statements Of Consolidated Cash

Statements Of Consolidated Cash Flows - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021
Operating Activities
Net Income	$ 487.1	$ 353.4
Adjustments to Reconcile Net Income to Net Cash from Operating Activities:
Depreciation and amortization	401.4	371.3
Deferred income taxes and investment tax credits	100.8	70.8
Loss (gain) on sale of assets	(105)	8
Other adjustments	14.1	8.9
Changes in Assets and Liabilities:
Components of working capital	2.4	(106.2)
Regulatory assets/liabilities	(8.2)	21.5
Deferred charges and other noncurrent assets	(16.1)	(2.5)
Other noncurrent liabilities	30.7	(22.2)
Net Cash Flows from Operating Activities	907.2	703
Investing Activities
Capital expenditures	(917)	(798.1)
Insurance recoveries	105	0
Payment to renewable generation asset developer	(79)	(7.4)
Other investing activities	(60.1)	(56.9)
Net Cash Flows used for Investing Activities	(951.1)	(862.4)
Financing Activities
Issuance of long-term debt, net of discount and underwriting costs	345.6	0
Repayments of long-term debt and finance lease obligations	(34.7)	(12.2)
Change in short-term borrowings, net (maturity ≤ 90 days)	(5)	(503)
Issuance of common stock, net of issuance costs	5.9	6
Equity costs, premiums and other debt related costs	(9.1)	(5.9)
Contributions from noncontrolling interest	0	7.4
Payments to Noncontrolling Interests	(3)	(0.2)
Issuance of equity units, net of underwriting costs	0	839.9
Dividends paid - common stock	(190.6)	(172.5)
Dividends paid - preferred stock	(27.6)	(27.6)
Contract liability payment	(33)	(7.7)
Net Cash Flows from Financing Activities	48.5	124.2
Change in cash, cash equivalents and restricted cash	4.6	(35.2)
Cash, cash equivalents and restricted cash at beginning of period	94.9	125.6
Cash, Cash Equivalents and Restricted Cash at End of Period	$ 99.5	$ 90.4

Statement of Consolidated Cash

Statement of Consolidated Cash Flows (Schedule of Balance Sheet Reconciliation) - USD ($) $ in Millions	Jun. 30, 2022	Dec. 31, 2021	Jun. 30, 2021	Dec. 31, 2020
Cash and Cash Equivalents, at Carrying Value	$ 77.8	$ 84.2
Restricted Cash	21.7	10.7
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents	$ 99.5	$ 94.9	$ 90.4	$ 125.6

Statements Of Consolidated Ca_2

Statements Of Consolidated Cash Flows (Supplemental Disclosures of Cash Flow Information) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021
Cash Flow, Noncash Investing and Financing Activities Disclosure [Abstract]
Capital expenditures included in current liabilities	$ 252.6	$ 193
Dividends declared but not paid	103.6	94.4
Purchase contract liability(1)	97.3	161.5
Obligation to developer at formation of joint venture	$ 0	$ 6

Statements Of Consolidated Equi

Statements Of Consolidated Equity - USD ($) $ in Millions	Total	Common Stock	Preferred Stock	[1]	Treasury Stock	Additional Paid-in Capital	Retained Deficit	Accumulated Other Comprehensive Income (Loss)	Noncontrolling Interest
Beginning balance at Dec. 31, 2020	$ 5,837.8	$ 3.9	$ 880		$ (99.9)	$ 6,890.1	$ (1,765.2)	$ (156.7)	$ 85.6
Comprehensive Income:
Net Income	353.4	0	0		0	0	355.8	0	(2.4)
Other comprehensive income (loss), net of tax	33.1	0	0		0	0	0	33.1	0
Dividends:
Common stock	(259)	0	0		0	0	(259)	0	0
Preferred stock	(35.7)	0	0		0	0	(35.7)	0	0
Distributions to noncontrolling interests	(7.2)	0	0		0	0	0	0	(7.2)
Stock Issuances:
Equity Units	665.5	0	838.8		0	(173.3)
Employee stock purchase plan	2.5	0	0		0	2.5	0	0	0
Long-term incentive plan	4.3	0	0		0	4.3	0	0	0
401(k) and profit sharing	4.7	0	0		0	4.7	0	0	0
ATM program	(0.3)	0	0		0	(0.3)	0	0
Ending balance at Jun. 30, 2021	6,613.5	3.9	1,718.8		(99.9)	6,728	(1,704.1)	(123.6)	90.4
Beginning balance at Mar. 31, 2021	6,025.7	3.9	880		(99.9)	6,892.9	(1,669.8)	(75.5)	94.1
Comprehensive Income:
Net Income	56.9	0	0		0	0	60.3	0	(3.4)
Other comprehensive income (loss), net of tax	(48.1)	0	0		0	0	0	(48.1)	0
Dividends:
Common stock	(86.4)	0	0		0	0	(86.4)	0	0
Preferred stock	(8.2)	0	0		0	0	(8.2)	0	0
Distributions to noncontrolling interests	(0.3)	0	0		0	0	0	0	0.3
Stock Issuances:
Equity Units	665.5	0	838.8		0	(173.3)			0
Employee stock purchase plan	1.2	0	0		0	1.2	0	0	0
Long-term incentive plan	4.8	0	0		0	4.8	0	0	0
401(k) and profit sharing	2.4	0	0		0	2.4	0	0	0
Ending balance at Jun. 30, 2021	6,613.5	3.9	1,718.8		(99.9)	6,728	(1,704.1)	(123.6)	90.4
Beginning balance at Dec. 31, 2021	7,272.9	4.1	1,546.5		(99.9)	7,204.3	(1,580.9)	(126.8)	325.6
Comprehensive Income:
Net Income	487.1	0	0		0	0	493.8	0	(6.7)
Other comprehensive income (loss), net of tax	91	0	0		0	0	0	91	0
Dividends:
Common stock	(286.1)	0	0		0	0	(286.1)	0	0
Preferred stock	(35.7)	0	0		0	0	(35.7)	0	0
Distributions to noncontrolling interests	(3.1)	0	0		0	0	0	0	3.1
Stock Issuances:
Equity Units							0	0
Employee stock purchase plan	2.5	0	0		0	2.5	0	0	0
Long-term incentive plan	6.9	0	0		0	6.9	0	0	0
401(k) and profit sharing	4.9	0	0		0	4.9	0	0	0
Ending balance at Jun. 30, 2022	7,540.4	4.1	1,546.5		(99.9)	7,218.6	(1,408.9)	(35.8)	315.8
Beginning balance at Mar. 31, 2022	7,531.4	4.1	1,546.5		(99.9)	7,208.9	(1,372.3)	(85.4)	329.5
Comprehensive Income:
Net Income	55.8	0	0		0	0	67	0	(11.2)
Other comprehensive income (loss), net of tax	49.6	0	0		0	0	0	49.6	0
Dividends:
Common stock	(95.4)	0	0		0	0	(95.4)	0	0
Preferred stock	(8.2)	0	0		0	0	(8.2)	0	0
Distributions to noncontrolling interests	2.5	0	0		0	0	0	0	2.5
Stock Issuances:
Equity Units							0	0
Employee stock purchase plan	1.3	0	0		0	1.3	0	0	0
Long-term incentive plan	6	0	0		0	6	0	0	0
401(k) and profit sharing	2.4	0	0		0	2.4	0	0	0
Ending balance at Jun. 30, 2022	$ 7,540.4	$ 4.1	$ 1,546.5		$ (99.9)	$ 7,218.6	$ (1,408.9)	$ (35.8)	$ 315.8
[1]Series A, Series B, and Series C shares have an aggregate liquidation preference of $400M, $500M, and $863M, respectively. See Note 5, "Equity" for additional information.

Statements of Consolidated Eq_2

Statements of Consolidated Equity (Shares) - shares shares in Thousands	Total	Preferred Stock	Common Stock	Treasury Stock
Beginning balance at Dec. 31, 2020	391,760	440	395,723	(3,963)
Issued:
Equity Units	0	863	0	0
Employee stock purchase plan	107	0	107	0
Long-term incentive plan	263	0	263	0
401(k) and profit sharing	199	0	199	0
Ending balance at Jun. 30, 2021	392,329	1,303	396,292	(3,963)
Beginning balance at Mar. 31, 2021	392,130	440	396,093	(3,963)
Issued:
Equity Units	0	863	0	0
Employee stock purchase plan	52	0	52	0
Long-term incentive plan	51	0	51	0
401(k) and profit sharing	96	0	96	0
Ending balance at Jun. 30, 2021	392,329	1,303	396,292	(3,963)
Beginning balance at Dec. 31, 2021	405,303	1,303	409,266	(3,963)
Issued:
Employee stock purchase plan	83	0	83	0
Long-term incentive plan	328	0	328	0
401(k) and profit sharing	164	0	164	0
Ending balance at Jun. 30, 2022	405,878	1,303	409,841	(3,963)
Beginning balance at Mar. 31, 2022	405,734	1,303	409,697	(3,963)
Issued:
Employee stock purchase plan	39	0	39	0
Long-term incentive plan	28	0	28	0
401(k) and profit sharing	77	0	77	0
Ending balance at Jun. 30, 2022	405,878	1,303	409,841	(3,963)

Statements Of Consolidated Eq_3

Statements Of Consolidated Equity (Parenthetical) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Common Stock, Dividends, Per Share, Declared	$ 0.24	$ 0.22	$ 0.71	$ 0.66
Series A Preferred Stock
Preferred Stock, Liquidation Preference, Value	$ 400	$ 400	$ 400	$ 400
Series B Preferred Stock
Preferred Stock, Liquidation Preference, Value	500	500	500	500
Series C Preferred Stock
Preferred Stock, Liquidation Preference, Value	$ 863	$ 863	$ 863	$ 863

Basis of Accounting Presentatio

Basis of Accounting Presentation	6 Months Ended
	Jun. 30, 2022
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Basis of Accounting Presentation	Basis of Accounting Presentation Our accompanying Condensed Consolidated Financial Statements (unaudited) reflect all normal recurring adjustments that are necessary, in the opinion of management, to present fairly the results of operations in accordance with GAAP in the United States of America. The accompanying financial statements include the accounts of us, our majority-owned subsidiaries, and VIEs of which we are the primary beneficiary after the elimination of all intercompany accounts and transactions. The accompanying financial statements should be read in conjunction with the consolidated financial statements and notes thereto included in our Annual Report on Form 10-K for the fiscal year ended December 31, 2021. Income for interim periods may not be indicative of results for the calendar year due to weather variations and other factors. The Condensed Consolidated Financial Statements (unaudited) have been prepared pursuant to the rules and regulations of the SEC. Certain information and note disclosures normally included in annual financial statements prepared in accordance with GAAP have been condensed or omitted pursuant to those rules and regulations, although we believe that the disclosures made in this Quarterly Report on Form 10-Q are adequate to make the information herein not misleading.

Recent Accounting Pronouncement

Recent Accounting Pronouncements	6 Months Ended
	Jun. 30, 2022
Accounting Standards Update and Change in Accounting Principle [Abstract]
Recent Accounting Pronouncements	Recent Accounting Pronouncements Recently Issued Accounting Pronouncements We are currently evaluating the impact of certain ASUs on our Condensed Consolidated Financial Statements (unaudited) and Notes to Condensed Consolidated Financial Statements (unaudited), which are described below: In March 2020, the FASB issued ASU 2020-04 Reference Rate Reform (Topic 848): Facilitation of the Effects of Reference Rate Reform on Financial Reporting and in January 2021, the FASB issued ASU 2021-01 Reference Rate Reform (Topic 848): Scope. These pronouncements provide temporary optional expedients and exceptions for applying GAAP principles to contract modifications and hedging relationships to ease the financial reporting burdens of the expected market transition from LIBOR and other interbank offered rates to alternative reference rates. These pronouncements are effective upon issuance on March 12, 2020, and will apply through December 31, 2022. We have evaluated the temporary expedients and options available under this guidance and identified the financial instruments to which the expedients could be applied, if deemed necessary. As of June 30, 2022, we have not applied any expedients or options available under these ASUs. In November 2021, the FASB issued ASU 2021-10 Government Assistance (Topic 832): Disclosures by Business Entities about Government Assistance . This pronouncement requires certain annual disclosures for transactions with a government that are accounted for by applying a grant or contribution accounting model by analogy to other accounting guidance. This pronouncement is applicable for financial statements issued for annual periods beginning after December 15, 2021. We are currently evaluating the impact of adoption, if any, on the Notes to the Consolidated Financial Statements. Recently Adopted Accounting Pronouncements In August 2020, the FASB issued ASU 2020-06 Debt with Conversion and Other Options (Subtopic 470-20) and Derivative and Hedging - Contracts in Entity's Own Equity (Subtopic 815-40): Accounting for Convertible Instruments and Contracts in an Entity's Own Equity. This pronouncement amends the guidance for entities that issue convertible instruments and/or contracts indexed to and potentially settled in an entity's own equity. The pronouncement eliminates the beneficial conversion and cash conversion accounting models for convertible instruments. Additionally, the pronouncement amends the guidance for the derivatives scope exception for contracts in an entity's own equity. This pronouncement impacts the denominator in the calculation of diluted EPS for our Equity Units as we are required to assume share settlement of the remaining purchase contract payment balance when applying the if-converted method. Moreover, we are required to utilize the average share price for the period instead of the end of period price. We adopted this pronouncement using the modified retrospective method as of January 1, 2022.

Revenue Recognition

Revenue Recognition	6 Months Ended
	Jun. 30, 2022
Revenue from Contract with Customer [Abstract]
Revenue from Contract with Customer	Revenue Recognition Revenue Disaggregation and Reconciliation. We disaggregate revenue from contracts with customers based upon reportable segment, as well as by customer class. The Gas Distribution Operations segment provides natural gas service and transportation for residential, commercial and industrial customers in Ohio, Pennsylvania, Virginia, Kentucky, Maryland, and Indiana. The Electric Operations segment provides electric service in 20 counties in the northern part of Indiana. The tables below reconcile revenue disaggregation by customer class to segment revenue, as well as to revenues reflected on the Condensed Statements of Consolidated Income (unaudited): Three Months Ended June 30, 2022 (in millions) Gas Distribution Operations Electric Operations Corporate and Other (2) Total Customer Revenues (1) Residential $ 465.0 $ 137.0 $ — $ 602.0 Commercial 160.6 134.7 — 295.3 Industrial 48.1 138.7 — 186.8 Off-system 59.1 — — 59.1 Miscellaneous 8.6 4.7 — 13.3 Total Customer Revenues $ 741.4 $ 415.1 $ — $ 1,156.5 Other Revenues (0.3) 22.0 5.0 26.7 Total Operating Revenues $ 741.1 $ 437.1 $ 5.0 $ 1,183.2 (1) Customer revenue amounts exclude intersegment revenues. See Note 18, "Business Segment Information," for discussion of intersegment revenues. (2) Other revenues primarily related to the Transition Services Agreement entered into in connection with the sale of the Massachusetts Business. Three Months Ended June 30, 2021 (in millions) Gas Distribution Operations Electric Operations Corporate and Other (2) Total Customer Revenues (1) Residential $ 378.6 $ 131.9 $ — $ 510.5 Commercial 125.4 130.0 — 255.4 Industrial 44.0 119.0 — 163.0 Off-system 17.0 — — 17.0 Miscellaneous 4.9 1.4 0.2 6.5 Total Customer Revenues $ 569.9 $ 382.3 $ 0.2 $ 952.4 Other Revenues 4.4 21.2 8.0 33.6 Total Operating Revenues $ 574.3 $ 403.5 $ 8.2 $ 986.0 (1) Customer revenue amounts exclude intersegment revenues. See Note 18, "Business Segment Information," for discussion of intersegment revenues. (2) Other revenues primarily related to the Transition Services Agreement entered into in connection with the sale of the Massachusetts Business. Six months ended June 30, 2022 (in millions) Gas Distribution Operations Electric Operations Corporate and Other (2) Total Customer Revenues (1) Residential $ 1,441.9 $ 275.5 $ — $ 1,717.4 Commercial 517.1 269.2 — 786.3 Industrial 115.9 268.5 — 384.4 Off-system 77.8 — — 77.8 Miscellaneous 22.6 8.3 — 30.9 Total Customer Revenues $ 2,175.3 $ 821.5 $ — $ 2,996.8 Other Revenues 2.5 45.7 11.5 59.7 Total Operating Revenues $ 2,177.8 $ 867.2 $ 11.5 $ 3,056.5 (1) Customer revenue amounts exclude intersegment revenues. See Note 18, "Business Segment Information," for discussion of intersegment revenues. (2) Other revenues related to the Transition Services Agreement entered into in connection with the sale of the Massachusetts Business. Six months ended June 30, 2021 (in millions) Gas Distribution Operations Electric Operations Corporate and Other (2) Total Customer Revenues (1) Residential $ 1,152.1 $ 261.1 $ — $ 1,413.2 Commercial 396.9 252.8 — 649.7 Industrial 101.9 241.9 — 343.8 Off-system 31.4 — — 31.4 Miscellaneous 14.7 5.7 0.4 20.8 Total Customer Revenues $ 1,697 $ 761.5 $ 0.4 $ 2,458.9 Other Revenues 13.1 44.5 15.1 72.7 Total Operating Revenues $ 1,710.1 $ 806.0 $ 15.5 $ 2,531.6 (1) Customer revenue amounts exclude intersegment revenues. See Note 18, "Business Segment Information," for discussion of intersegment revenues. (2) Other revenues related to the Transition Services Agreement entered into in connection with the sale of the Massachusetts Business. Customer Accounts Receivable. Accounts receivable on our Condensed Consolidated Balance Sheets (unaudited) includes both billed and unbilled amounts, as well as certain amounts that are not related to customer revenues. Unbilled amounts of accounts receivable relate to a portion of a customer’s consumption of gas or electricity from the date of the last cycle billing through the last day of the month (balance sheet date). Factors taken into consideration when estimating unbilled revenue include historical usage, customer rates and weather. A significant portion of our operations are subject to seasonal fluctuations in sales. During the heating season, primarily from November through March, revenues and receivables from gas sales are more significant than in other months. The opening and closing balances of customer receivables for the six months ended June 30, 2022 are presented in the table below. We had no significant contract assets or liabilities during the period. Additionally, we have not incurred any significant costs to obtain or fulfill contracts. (in millions) Customer Accounts Receivable, Billed (less reserve) Customer Accounts Receivable, Unbilled (less reserve) Balance as of December 31, 2021 $ 459.6 $ 337.0 Balance as of June 30, 2022 473.7 216.9 Utility revenues are billed to customers monthly on a cycle basis. We expect that substantially all customer accounts receivable will be collected following customer billing, as this revenue consists primarily of periodic, tariff-based billings for service and usage. We maintain common utility credit risk mitigation practices, including requiring deposits and actively pursuing collection of past due amounts. Our regulated operations also utilize certain regulatory mechanisms that facilitate recovery of bad debt costs within tariff-based rates, which provides further evidence of collectibility. It is probable that substantially all of the consideration to which we are entitled from customers will be collected upon satisfaction of performance obligations. Allowance for Credit Losses. To evaluate for expected credit losses, customer account receivables are pooled based on similar risk characteristics, such as customer type, geography, payment terms, and related macro-economic risks. Expected credit losses are established using a model that considers historical collections experience, current information, and reasonable and supportable forecasts. Internal and external inputs are used in our credit model including, but not limited to, energy consumption trends, revenue projections, actual charge-offs data, recoveries data, shut-offs, customer delinquencies, and final bill data. We continuously evaluate available information relevant to assessing collectability of current and future receivables. We evaluate creditworthiness of specific customers periodically or following changes in facts and circumstances. When we become aware of a specific commercial or industrial customer's inability to pay, an allowance for expected credit losses is recorded for the relevant amount. We also monitor other circumstances that could affect our overall expected credit losses including, but not limited to, creditworthiness of overall population in service territories, adverse conditions impacting an industry sector, and current economic conditions. At each reporting period, we record expected credit losses to an allowance for credit losses account. When deemed to be uncollectible, customer accounts are written-off. A rollforward of our allowance for credit losses as of June 30, 2022 and December 31, 2021 are presented in the table below: ( in millions ) Gas Distribution Operations Electric Operations Corporate and Other Total Balance as of January 1, 2022 $ 18.9 $ 3.8 $ 0.8 $ 23.5 Current period provisions 14.8 4.2 — 19.0 Write-offs charged against allowance (21.3) (2.7) — (24.0) Recoveries of amounts previously written off 7.3 0.3 — 7.6 Balance as of June 30, 2022 $ 19.7 $ 5.6 $ 0.8 $ 26.1 ( in millions ) Gas Distribution Operations Electric Operations Corporate and Other Total Balance as of January 1, 2021 $ 41.8 $ 9.7 $ 0.8 $ 52.3 Current period provisions 5.8 1.4 — 7.2 Write-offs charged against allowance (46.7) (7.7) — (54.4) Recoveries of amounts previously written off 18.0 0.4 — 18.4 Balance as of December 31, 2021 $ 18.9 $ 3.8 $ 0.8 $ 23.5

Earnings Per Share

Earnings Per Share	6 Months Ended
	Jun. 30, 2022
Earnings Per Share [Abstract]
Earnings Per Share	Earnings Per Share The calculations of basic and diluted EPS are based on the weighted average number of shares of common stock and potential common stock outstanding during the period. For the purposes of determining diluted EPS, the shares underlying the purchase contracts included within the Equity Units were included in the calculation of potential common stock outstanding for the three and six months ended June 30, 2022 and 2021 using the if-converted method under US GAAP. For the purchase contracts, the number of shares of our common stock that would be issuable at the end of each reporting period will be reflected in the denominator of our diluted EPS calculation. If the average stock price during the period falls below the initial reference price of $24.51, subject to anti-dilution adjustments, the number of shares of our common stock used in calculating diluted EPS will be the maximum number of shares per the contract as described in Note 5, "Equity." Conversely, if the average stock price during the period is above the initial reference price of $24.51, subject to anti-dilution adjustments, a variable number of shares of our common stock will be used in calculating diluted EPS. A numerator adjustment was reflected in the calculation of diluted EPS for interest expense incurred for the three and six months ended June 30, 2022 and 2021 net of tax, related to the purchase contracts. We adopted ASU 2020-06 on January 1, 2022, which resulted in additional dilution from our Equity Units by requiring us to assume share settlement of the remaining purchase contract payment balance based on the average share price during the period. Refer to Note 2, "Recent Accounting Pronouncements," for more information on ASU 2020-06. The shares underlying the Series C Mandatory Convertible Preferred Stock included within the Equity Units are contingently convertible securities as the conversion is contingent on a successful remarketing as described in Note 5, "Equity." Contingently convertible shares where conversion is not tied to a market price trigger are excluded from the calculation of diluted EPS until such time as the contingency has been resolved under the if-converted method. As of June 30, 2022 and 2021, the contingency was not resolved and thus no shares were reflected in the denominator in the calculation of diluted EPS for the three and six months ended June 30, 2022 and 2021. Diluted EPS also includes the incremental effects of the various long-term incentive compensation plans and the open ATM forward agreements during the period under the treasury stock method when the impact would be dilutive. Refer to Note 5, "Equity," for more information on our ATM forward agreements. The following table presents the calculation of our basic and diluted EPS: Three Months Ended Six Months Ended (in millions, except per share amounts) 2022 2021 2022 2021 Numerator: Net Income Available to Common Shareholders - Basic $ 53.2 $ 46.5 $ 466.2 $ 328.2 Dilutive effect of Equity Units 0.5 0.4 1.0 0.4 Net Income Available to Common Shareholders - Diluted $ 53.7 $ 46.9 $ 467.2 $ 328.6 Denominator: Average common shares outstanding - Basic 406.4 393.0 406.2 392.8 Dilutive potential common shares: Equity Units purchase contracts 27.9 28.2 28.5 14.2 Equity Units purchase contract payment balance 3.3 — 3.6 — Shares contingently issuable under employee stock plans 1.0 0.8 1.0 0.7 Shares restricted under employee stock plans 0.4 0.3 0.4 0.3 ATM forward agreements 1.2 0.6 1.1 0.5 Average Common Shares - Diluted 440.2 422.9 440.8 408.5 Earnings per common share: Basic $ 0.13 $ 0.12 $ 1.15 $ 0.84 Diluted $ 0.12 $ 0.11 $ 1.06 $ 0.80

Equity

Equity	6 Months Ended
	Jun. 30, 2022
Equity [Abstract]
Equity	Equity ATM Program and Forward Sale Agreement. On February 22, 2021, we entered into six separate equity distribution agreements pursuant to which we are able to sell up to an aggregate of $750.0 million of our common stock. On August 9, 2021, under the ATM program, we executed a forward sale agreement, which allows us to issue a fixed number of shares at a price to be settled in the future. From August 9, 2021 to September 1, 2021, the forward purchaser under our forward sale agreement borrowed 5,941,598 shares from third parties, which the forward purchaser sold, through its affiliated agent, at a weighted average price of $25.25 per share. We may settle the forward sale agreement in shares, cash, or net shares by December 15, 2022. Had we settled all the shares under the forward sale agreement at June 30, 2022, we would have received approximately $143.8 million, based on a net price of $24.20 per share. As of June 30, 2022, the ATM program (including the impacts of the forward sale agreement discussed above) had approximately $300.0 million of equity available for issuance. The program expires on December 31, 2023. Preferred Stock . As of June 30, 2022, we had 20,000,000 shares of preferred stock authorized for issuance, of which 1,302,500 shares of preferred stock in the aggregate for all series were outstanding. The following table displays preferred dividends declared for the period by outstanding series of shares: Three Months Ended Six Months Ended June 30, December 31, 2022 2021 2022 2021 2022 2021 (in millions except shares and per share amounts) Liquidation Preference Per Share Shares Dividends Declared Per Share Outstanding 5.650% Series A $ 1,000.00 400,000 — — 28.25 28.25 $ 393.9 $ 393.9 6.500% Series B $ 25,000.00 20,000 406.25 406.25 1,218.75 1,218.75 $ 486.1 $ 486.1 Series C (1) $ 1,000.00 862,500 — — — — $ 666.5 $ 666.5 (1) The Series C Mandatory Convertible Preferred Stock initially will not bear any dividends. We recorded the initial present value of the purchase contract payments as a liability with a corresponding reduction to preferred stock. In addition, 20,000 shares of Series B–1 Preferred Stock, par value $0.01 per share, were outstanding as of June 30, 2022. Holders of Series B–1 Preferred Stock are not entitled to receive dividend payments and have no conversion rights. The Series B–1 Preferred Stock is paired with the Series B Preferred Stock and may not be transferred, redeemed or repurchased except in connection with the simultaneous transfer, redemption or repurchase of the underlying Series B Preferred Stock. As of June 30, 2022 and 2021, Series A Preferred Stock had $1.0 million of cumulative preferred dividends in arrears, or $2.51 per share, and Series B Preferred Stock had $1.4 million of cumulative preferred dividends in arrears, or $72.23 per share. Equity Units. On April 19, 2021, we completed the sale of 8.625 million Equity Units, initially consisting of Corporate Units, each with a stated amount of $100. Each Corporate Unit consists of a forward contract to purchase shares of our common stock in the future and a 1/10th, or 10%, undivided beneficial ownership interest in one share of Series C Mandatory Convertible Preferred Stock, par value $0.01 per share, with a liquidation preference of $1,000 per share. We are accounting for the Corporate Units as a single unit of account. Selected information about the Equity Units at the issuance date is presented below: (in millions except contract rate) Issuance Date Units Issued Total Net Proceeds (1) Purchase Contract Annual Rate Purchase Contract Liability Equity Units April 19, 2021 8.625 $ 835.5 7.75 % $ 168.8 (1) Issuance costs of $27.0 million were recorded on a relative fair value basis as a reduction to preferred stock of $22.5 million and a reduction to the purchase contract liability of $4.5 million. The purchase contract obligates holders to purchase shares of our common stock on December 1, 2023, subject to early settlement in certain situations. The purchase price paid under the purchase contract is $100 and the number of shares to be purchased will be determined under a settlement rate formula based on the volume-weighted average share price of our common stock near the settlement date, subject to a maximum settlement rate. The Series C Mandatory Convertible Preferred Stock will initially be pledged upon issuance as collateral to secure the purchase of common stock under the related purchase contracts. The Series C Mandatory Convertible Preferred Stock is expected to be remarketed prior to December 1, 2023, and each share, unless previously converted, will automatically convert to common stock based on a conversion rate on the mandatory conversion date, which is expected to be on or about March 1, 2024. The conversion rate will be determined based on the volume-weighted average share price of our common stock near the conversion date, subject to a minimum and maximum conversion rate. Prior to December 1, 2023, the Series C Mandatory Convertible Preferred Stock will not bear any dividends and the liquidation preference will not accrete. Following a successful remarketing, dividends may become payable on the Series C Mandatory Convertible Preferred Stock and/or the minimum conversion rate of the Series C Mandatory Convertible Preferred Stock may be increased. If no successful remarketing of the Series C Mandatory Convertible Preferred Stock has previously occurred, effective as of December 1, 2023, the conversion rate will be zero, no shares of our common stock will be delivered upon automatic conversion and each share of Series C Mandatory Convertible Preferred Stock will be automatically transferred to us on the mandatory conversion date without any payment of cash or shares of our common stock thereon. In the event of such a remarketing failure, any shares of Series C Mandatory Convertible Preferred Stock held as part of Corporate Units will be automatically delivered to us on December 1, 2023 in full satisfaction of the relevant holder's obligation under the related purchase contracts. We will pay quarterly contract adjustment payments to holders of the Equity Units at the rate of 7.75% per year on the stated amount of $100 per Equity Unit. The contract adjustment payments are payable in cash, shares of our common stock or a combination thereof, at our election. The payment of contract adjustment payments may also be deferred until the purchase contract settlement date, December 1, 2023, at our election. As of June 30, 2022, no contract adjustment payments have been deferred with quarterly cash payments being remitted to the holders. As of June 30, 2022 and December 31, 2021 the purchase contract liability was $97.3 million and $129.4 million, respectively. Purchase contract payments are recorded against this liability. Accretion of the purchase contract liability is recorded as interest expense. Cash payments of $33.4 million and $7.8 million were made during the six months ended June 30, 2022 and 2021, respectively. Refer to Note 4, "Earnings Per Share," for additional information regarding our treatment of the Equity Units for diluted EPS. Under the terms of the Equity Units, assuming no anti-dilution or other adjustments such as a fundamental change, the maximum number of shares of common stock we will issue under the purchase contracts is 35.2 million and maximum number of shares of common stock we will issue under the Series C Mandatory Convertible Preferred Stock is 35.2 million. Had we settled the remaining purchase contract payment balance in shares at June 30, 2022, we would have issued approximately 3.3 million shares.

Regulatory Matters

Regulatory Matters	6 Months Ended
	Jun. 30, 2022
Regulatory Assets and Liabilities Disclosure [Abstract]
Regulatory Matters	Regulatory Matters NIPSCO change in accounting estimate As part of the NIPSCO Gas Settlement and Stipulation Agreement filed on March 2, 2022, NIPSCO Gas has agreed to change the depreciation methodology for its calculation of deprecation rates, which will reduce depreciation expense and subsequent revenues and cash flows once new rates become effective. An order was received on July 27, 2022 approving the rate case. Columbia of Ohio regulatory filing update On Wednesday, April 6, 2022, the PUCO Staff issued its Staff Report in Columbia of Ohio's base rate case, filed on June 21, 2021, which was filed in conjunction with applications for an alternative rate plan, approval of certain deferral authority, and updates to certain riders. Columbia of Ohio's application requested a net rate increase approximating a 21.3% or $221.4 million increase in revenue per year. The Staff Report recommended a rate increase of 4.0% - 6.3% or $35.2 million to $57.6 million increase in revenue per year. The Staff recommended adjustments include, but are not limited to, plant assets, labor adjustments, COVID-19 deferrals and environmental remediation costs, rider caps, and rate of return. On May 6, 2022 and May 13, 2022, respectively, Columbia of Ohio and the other parties filed written objections to the Staff report as well as written testimony. Local public hearings have concluded, and Columbia of Ohio has filed a motion requesting that the evidentiary hearing commence on October 18, 2022, to provide more time for settlement discussions. Regulatory deferral related to renewable energy investments In accordance with the accounting principles of ASC 980, we recognize a regulatory liability or asset for amounts representing the timing difference between the profit earned from the joint ventures and the amount included in regulated rates to recover our approved investments in consolidated joint ventures. The amounts recorded in income will ultimately reflect the amount allowed in regulated rates to recover our investments over the useful life of the projects. The offset to the regulatory liability or asset associated with our renewable investments included in regulated rates is recorded in "Depreciation expense" on the Condensed Statements of Consolidated Income (unaudited). We recorded a debit to depreciation expense of $9.6 million and $6.7 million for the three and six months ended June 30, 2022, and zero for the three and six months ended June 30, 2021, respectively, related to the regulatory deferral of income (loss) associated with our joint ventures, which is not included in current rates. Refer to Note 12, "Variable Interest Entities" for additional information. FAC Adjustment As ordered by the IURC on June 15, 2022, NIPSCO is required to refund to customers $8.0 million of over-collected fuel costs. The refund is recorded as a regulatory liability on the Condensed Consolidated Balance Sheets (unaudited).

Risk Management Activities

Risk Management Activities	6 Months Ended
	Jun. 30, 2022
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Risk Management Activities	Risk Management Activities We are exposed to certain risks relating to our ongoing business operations; namely commodity price risk and interest rate risk. We recognize that the prudent and selective use of derivatives may help to lower our cost of debt capital, manage our interest rate exposure and limit volatility in the price of natural gas. Risk management assets and liabilities on our derivatives are presented on the Condensed Consolidated Balance Sheets (unaudited) as shown below: June 30, 2022 December 31, 2021 (in millions) Assets Liabilities Assets Liabilities Current (1) Derivatives designated as hedging instruments $ — $ 9.5 $ — $ 136.4 Derivatives not designated as hedging instruments 33.7 0.5 10.6 0.4 Total $ 33.7 $ 10.0 $ 10.6 $ 136.8 Noncurrent (2) Derivatives designated as hedging instruments $ — $ — $ — $ — Derivatives not designated as hedging instruments 71.9 1.5 13.8 7.4 Total $ 71.9 $ 1.5 $ 13.8 $ 7.4 (1) Current assets and liabilities are presented in "Prepayments and other" and "Other accruals", respectively, on the Condensed Consolidated Balance Sheets (unaudited). (2) Noncurrent assets and liabilities are presented in "Deferred charges and other" and "Other noncurrent liabilities", respectively, on the Condensed Consolidated Balance Sheets (unaudited). Derivatives Not Designated as Hedging Instruments Commodity price risk management. We, along with our utility customers, are exposed to variability in cash flows associated with natural gas purchases and volatility in natural gas prices. We purchase natural gas for sale and delivery to our retail, commercial and industrial customers, and for most customers the variability in the market price of gas is passed through in their rates. Some of our utility subsidiaries offer programs whereby variability in the market price of gas is assumed by the respective utility. The objective of our commodity price risk programs is to mitigate the gas cost variability, for us or on behalf of our customers, associated with natural gas purchases or sales by economically hedging the various gas cost components using a combination of futures, options, forwards or other derivative contracts. At June 30, 2022 and December 31, 2021, we had 112.3 MMDth and 124.5 MMDth, respectively, of net energy derivative volumes outstanding related to our natural gas hedges. NIPSCO has received IURC approval to lock in a fixed price for its natural gas customers using long-term forward purchase instruments and is limited to 20% of NIPSCO's average annual GCA purchase volume. As of June 30, 2022, the remaining terms of these instruments range from one five All gains and losses on these derivative contracts are deferred as regulatory liabilities or assets and are remitted to or collected from customers through NIPSCO’s quarterly GCA mechanism. These instruments are not designated as accounting hedges. The following table summarizes the gains and losses associated with the commodity price risk programs: (in millions) June 30, 2022 December 31, 2021 Regulatory Assets Losses on commodity price risk programs $ 6.8 $ 9.6 Regulatory Liabilities Gains on commodity price risk programs 127.7 34.2 Derivatives Designated as Hedging Instruments Interest rate risk management. As of June 30, 2022, we have one forward-starting interest rate swap with a notional value of $250.0 million to hedge the variability in cash flows attributable to changes in the benchmark interest rate associated with a forecasted debt issuance. This interest rate swap is designated as a cash flow hedge. On June 7, 2022, we settled a $250.0 million forward-starting interest rate swap agreement contemporaneously with the issuance of $350.0 million of 5.00% senior unsecured notes maturing in 2052. The derivative contract was accounted for as a cash flow hedge. As part of the transaction, the associated net unrealized gain position of $10.2 million is being amortized from accumulated other comprehensive loss into interest expense over the life of the associated debt. Refer to Note 13, "Long Term Debt" for additional information. Cash flow hedges included in "Accumulated other comprehensive loss" on the Condensed Consolidated Balance Sheets (unaudited) were: (in millions) AOCI (1) Amounts Expected to be Reclassified to Earnings During the Next 12 Months (1) Maximum Term Interest Rate $ (19.5) (0.2) 365 months (1) All amounts are net of tax. The actual amounts reclassified from Accumulated other comprehensive loss to Net Income can differ from the estimate above due to market rate changes. The gains and losses related to these swaps are recorded to AOCI. Upon issuance, we amortize the gains and losses over the life of the debt associated with these swaps as we recognize interest expense. These amounts are immaterial for the three and six months ended June 30, 2022 and 2021 and are recorded in "Interest expense, net" on the Condensed Statements of Consolidated Income (unaudited). If it becomes probable that a hedged forecasted transaction will no longer occur, the accumulated gains or losses on the derivative will be recognized currently in "Other, net" in the Condensed Statements of Consolidated Income (unaudited). There were no amounts excluded from effectiveness testing for derivatives in cash flow hedging relationships at June 30, 2022 and December 31, 2021. Our derivative instruments measured at fair value as of June 30, 2022 and December 31, 2021 do not contain any credit-risk-related contingent features. Cash flows for derivative financial instruments are generally classified as operating activities.

Fair Value

Fair Value	6 Months Ended
	Jun. 30, 2022
Fair Value Disclosures [Abstract]
Fair Value	Fair Value A. Fair Value Measurements Recurring Fair Value Measurements The following tables present financial assets and liabilities measured and recorded at fair value on our Condensed Consolidated Balance Sheets (unaudited) on a recurring basis and their level within the fair value hierarchy as of June 30, 2022 and December 31, 2021: Recurring Fair Value Measurements (in millions) Quoted Prices in Significant Significant Balance as of June 30, 2022 Assets Risk management assets $ — $ 105.6 $ — $ 105.6 Available-for-sale debt securities — 149.8 — 149.8 Total $ — $ 255.4 $ — $ 255.4 Liabilities Risk management liabilities $ — $ 11.5 $ — $ 11.5 Total $ — $ 11.5 $ — $ 11.5 Recurring Fair Value Measurements (in millions) Quoted Prices in Significant Significant Balance as of December 31, 2021 Assets Risk management assets $ — $ 24.4 $ — $ 24.4 Available-for-sale debt securities — 171.8 — 171.8 Total $ — $ 196.2 $ — $ 196.2 Liabilities Risk management liabilities $ — $ 144.2 $ — $ 144.2 Total $ — $ 144.2 $ — $ 144.2 Risk Management Assets and Liabilities. Risk management assets and liabilities include interest rate swaps, exchange-traded NYMEX futures and NYMEX options and non-exchange-based forward purchase contracts. Level 1- When utilized, exchange-traded derivative contracts are based on unadjusted quoted prices in active markets and are classified within Level 1. These financial assets and liabilities are secured with cash on deposit with the exchange; therefore, nonperformance risk has not been incorporated into these valuations. These financial assets and liabilities are deemed to be cleared and settled daily by NYMEX as the related cash collateral is posted with the exchange. As a result of this exchange rule, NYMEX derivatives are considered to have no fair value at the balance sheet date for financial reporting purposes, and are presented in Level 1 net of posted cash; however, the derivatives remain outstanding and are subject to future commodity price fluctuations until they are settled in accordance with their contractual terms. Level 2- Certain non-exchange-traded derivatives are valued using broker or over-the-counter, on-line exchanges. In such cases, these non-exchange-traded derivatives are classified within Level 2. Non-exchange-based derivative instruments include swaps, forwards, and options. In certain instances, these instruments may utilize models to measure fair value. We use a similar model to value similar instruments. Valuation models utilize various inputs that include quoted prices for similar assets or liabilities in active markets, quoted prices for identical or similar assets or liabilities in markets that are not active, other observable inputs for the asset or liability and market-corroborated inputs, (i.e., inputs derived principally from or corroborated by observable market data by correlation or other means). Where observable inputs are available for substantially the full term of the asset or liability, the instrument is categorized within Level 2. Level 3- Certain derivatives trade in less active markets with a lower availability of pricing information and models may be utilized in the valuation. When such inputs have a significant impact on the measurement of fair value, the instrument is categorized within Level 3. Credit risk is considered in the fair value calculation of derivative instruments that are not exchange-traded. Credit exposures are adjusted to reflect collateral agreements that reduce exposures. As of June 30, 2022 and December 31, 2021, there were no material transfers between fair value hierarchies. Additionally, there were no changes in the method or significant assumptions used to estimate the fair value of our financial instruments. Credit risk is considered in the fair value calculation of each of our forward-starting interest rate swaps, as described in Note 7, "Risk Management Activities." As they are based on observable data and valuations of similar instruments, the hedges are categorized within Level 2 of the fair value hierarchy. There was no exchange of premium at the initial date of the swaps, and we can settle the contracts at any time. NIPSCO has entered into long-term forward natural gas purchase instruments to lock in a fixed price for its natural gas customers. We value these contracts using a pricing model that incorporates market-based information when available, as these instruments trade less frequently and are classified within Level 2 of the fair value hierarchy. For additional information, see Note 7, "Risk Management Activities." Available-for-Sale Debt Securities. Available-for-sale debt securities are investments pledged as collateral for trust accounts related to our wholly owned insurance company. We value U.S. Treasury, corporate debt and mortgage-backed securities using a matrix pricing model that incorporates market-based information. These securities trade less frequently and are classified within Level 2. Our available-for-sale debt securities impairments are recognized periodically using an allowance approach. At each reporting date, we utilize a quantitative and qualitative review process to assess the impairment of available-for-sale debt securities at the individual security level. For securities in a loss position, we evaluate our intent to sell or whether it is more-likely-than-not that we will be required to sell the security prior to the recovery of its amortized cost. If either criteria is met, the loss is recognized in earnings immediately, with the offsetting entry to the carrying value of the security. If both criteria are not met, we perform an analysis to determine whether the unrealized loss is related to credit factors. The analysis focuses on a variety of factors that include, but are not limited to, downgrade on ratings of the security, defaults in the current reporting period or projected defaults in the future, the security's yield spread over treasuries, and other relevant market data. If the unrealized loss is not related to credit factors, it is included in other comprehensive income. If the unrealized loss is related to credit factors, the loss is recognized as credit loss expense in earnings during the period, with an offsetting entry to the allowance for credit losses. The amount of the credit loss recorded to the allowance account is limited by the amount at which the security's fair value is less than its amortized cost basis. If certain amounts recorded in the allowance for credit losses are deemed uncollectible, the allowance on the uncollectible portion will be charged off, with an offsetting entry to the carrying value of the security. Subsequent improvements to the estimated credit losses of available-for-sale debt securities will be recognized immediately in earnings. As of June 30, 2022 and December 31, 2021, we recorded $1.0 million and $0.2 million, respectively, as an allowance for credit losses on available-for-sale debt securities as a result of the analysis described above. Continuous credit monitoring and portfolio credit balancing mitigates our risk of credit losses on our available-for-sale debt securities. The amortized cost, gross unrealized gains and losses, allowance for credit losses, and fair value of available-for-sale securities at June 30, 2022 and December 31, 2021 were: June 30, 2022 (in millions) Amortized Gross Unrealized Gains Gross Unrealized Losses (1) Allowance for Credit Losses Fair Available-for-sale debt securities U.S. Treasury debt securities $ 51.1 $ — $ (2.4) $ — $ 48.7 Corporate/Other debt securities 109.1 0.1 (7.1) (1.0) 101.1 Total $ 160.2 $ 0.1 $ (9.5) $ (1.0) $ 149.8 December 31, 2021 (in millions) Amortized Gross Unrealized Gains Gross Unrealized Losses (2) Allowance for Credit Losses Fair Available-for-sale debt securities U.S. Treasury debt securities $ 52.8 $ 0.1 $ (0.4) $ — $ 52.5 Corporate/Other debt securities 116.5 3.7 (0.7) (0.2) 119.3 Total $ 169.3 $ 3.8 $ (1.1) $ (0.2) $ 171.8 (1) Fair value of U.S. Treasury debt securities and Corporate/Other debt securities in an unrealized loss position without an allowance for credit losses is $47.0 million and $89.9 million, respectively, at June 30, 2022. (2) Fair value of U.S. Treasury debt securities and Corporate/Other debt securities in an unrealized loss position without an allowance for credit losses is $36.2 million and $35.4 million, respectively, at December 31, 2021. The cost of maturities sold is based upon specific identification. Realized gains and losses on available-for-sale securities were immaterial for the three and six months ended June 30, 2022 and 2021. At June 30, 2022, approximately $3.3 million of U.S. Treasury debt securities and approximately $10.0 million of Corporate/Other debt securities have maturities of less than a year. Non-recurring Fair Value Measurements We measure the fair value of certain assets, including goodwill, on a non-recurring basis, typically when events or changes in circumstances indicate that the carrying amount of the assets may not be recoverable. Purchase Contract Liability. At April 19, 2021, we recorded the purchase contract liability at fair value using a discounted cash flow method and observable, market-corroborated inputs. This estimate was made at April 19, 2021, and will not be remeasured at each subsequent balance sheet date. It has been categorized within Level 2 of the fair value hierarchy. Refer to Note 5, ''Equity'' for additional information. B. Other Fair Value Disclosures for Financial Instruments. The carrying amount of cash and cash equivalents, restricted cash, notes receivable, customer deposits and short-term borrowings is a reasonable estimate of fair value due to their liquid or short-term nature. Our long-term borrowings are recorded at historical amounts. The following method and assumptions were used to estimate the fair value of each class of financial instruments. Long-term Debt. The fair value of outstanding long-term debt is estimated based on the quoted market prices for the same or similar securities. Certain premium costs associated with the early settlement of long-term debt are not taken into consideration in determining fair value. These fair value measurements are classified within Level 2 of the fair value hierarchy. As of June 30, 2022, there was no change in the method or significant assumptions used to estimate the fair value of long-term debt. The carrying amount and estimated fair values of these financial instruments were as follows: (in millions) Carrying Amount as of June 30, 2022 Estimated Fair Value as of June 30, 2022 Carrying Amount as of Dec. 31, 2021 Estimated Fair Value as of Dec. 31, 2021 Long-term debt (including current portion) $ 9,557.5 $ 8,770.0 $ 9,241.5 $ 10,415.7

Goodwill

Goodwill	6 Months Ended
	Jun. 30, 2022
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill	Goodwill Substantially all of our goodwill relates to the excess of cost over the fair value of the net assets acquired in the Columbia acquisition on November 1, 2000. Our goodwill balance was $1,485.9 million as of June 30, 2022 and December 31, 2021. All our goodwill has been allocated to our Gas Distribution Operations segment. For our annual goodwill impairment analysis performed as of May 1, 2022, we performed a qualitative "step 0" assessment and determined that it was more likely than not that the estimated fair value of the reporting unit substantially exceeded the related carrying value of our reporting unit. For this test, we assessed various assumptions, events and circumstances that would have affected the estimated fair value of the reporting units as compared to their baseline May 1, 2020 "step 1" fair value measurement. There have been no impairments to the carrying value of our goodwill during the periods presented.

Income Taxes

Income Taxes	6 Months Ended
	Jun. 30, 2022
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes Our interim effective tax rates reflect the estimated annual effective tax rates for 2022 and 2021, adjusted for tax expense associated with certain discrete items. The effective tax rates for the three months ended June 30, 2022 and 2021 were 17.7% and 18.8%, respectively. The effective tax rates for the six months ended June 30, 2022 and 2021 were 18.2% and 17.7%, respectively. These effective tax rates differ from the federal statutory tax rate of 21% primarily due to increased amortization of excess deferred federal income tax liabilities, as specified in the TCJA, tax credits, state income taxes and other permanent book-to-tax differences. These adjustments have a relative impact on the effective tax rate proportionally to pretax income or loss. The decrease in the three month effective tax rate of 1.1% in 2022 compared to 2021 is primarily attributed to lower state income taxes due to the jurisdictional mix of pre-tax income and partnership income, offset by decreased amortization of excess deferred federal income tax liabilities. The increase in the six month effective tax rate of 0.5% in 2022 compared to 2021 is primarily attributed to slightly higher state income taxes due to the jurisdictional mix of pre-tax income. There were no material changes recorded in 2022 to our uncertain tax positions recorded as of December 31, 2021.

Pension And Other Postretiremen

Pension And Other Postretirement Benefits	6 Months Ended
	Jun. 30, 2022
Pension and Other Postretirement Benefits Cost (Reversal of Cost) [Abstract]
Pension And Other Postretirement Benefits	Pension and Other Postemployment Benefits We provide defined contribution plans and noncontributory defined benefit retirement plans that cover certain of our employees. Benefits under the defined benefit retirement plans reflect the employees' compensation, years of service and age at retirement. Additionally, we provide health care and life insurance benefits for certain retired employees. The majority of employees may become eligible for these benefits if they reach retirement age while working for us. The expected cost of such benefits is accrued during the employees' years of service. We determined that, for certain rate-regulated subsidiaries, the future recovery of postretirement benefit costs is probable, and we record regulatory assets and liabilities for amounts that would otherwise have been recorded to expense or accumulated other comprehensive loss. Current rates of rate-regulated companies include postretirement benefit costs, including amortization of the regulatory assets and liabilities that arose prior to inclusion of these costs in rates. For most plans, cash contributions are remitted to grantor trusts. For the six months ended June 30, 2022, we contributed $1.3 million to our pension plans and $10.5 million to our OPEB plans. The following table provides the components of the plans' actuarially determined net periodic benefit cost for the three and six months ended June 30, 2022 and 2021: Pension Benefits OPEB Three Months Ended June 30, (in millions) 2022 2021 2022 2021 Components of Net Periodic Benefit (Income) Cost (1) Service cost $ 7.0 $ 7.5 $ 1.6 $ 1.5 Interest cost 9.8 7.9 3.0 2.5 Expected return on assets (22.8) (25.3) (4.0) (3.8) Amortization of prior service credit — — (0.6) (0.6) Recognized actuarial loss 4.8 5.5 0.7 1.2 Settlement loss 6.3 3.3 — — Total Net Periodic Benefit (Income) Cost $ 5.1 $ (1.1) $ 0.7 $ 0.8 (1) The service cost component and all non-service cost components of net periodic benefit (income) cost are presented in "Operation and maintenance" and "Other, net," respectively, on the Condensed Statements of Consolidated Income (unaudited). Pension Benefits OPEB Six Months Ended June 30, (in millions) 2022 2021 2022 2021 Components of Net Periodic Benefit (Income) Cost (1) Service cost $ 14.1 $ 15.1 $ 3.2 $ 3.0 Interest cost 19.2 15.6 6.0 5.0 Expected return on assets (45.7) (51.1) (8.0) (7.6) Amortization of prior service credit — — (1.2) (1.2) Recognized actuarial loss 9.3 10.8 1.4 2.4 Settlement loss 6.3 6.6 — — Total Net Periodic Benefit (Income) Cost $ 3.2 $ (3.0) $ 1.4 $ 1.6 (1) The service cost component and all non-service cost components of net periodic benefit (income) cost are presented in "Operation and maintenance" and "Other, net," respectively, on the Condensed Statements of Consolidated Income (unaudited). As of May 31, 2022, one of our qualified pension plans met the requirement for settlement accounting. A settlement charge of $6.3 million was recorded during the second quarter of 2022. As a result of the settlement, the pension plan was remeasured, resulting in a decrease to the net pension asset of $39.8 million, a net increase to regulatory assets of $30.0 million, and a net debit to accumulated other comprehensive loss of $3.5 million. Net periodic pension benefit cost for 2022 increased by $5.7 million as a result of the interim remeasurement. For the interim remeasurement, the discount rate used to calculate the remeasured plan's pension benefit obligation was updated to 4.13% from 2.60% at December 31, 2021. At the time of the interim remeasurement, we also updated the discount rates and expected return on assets used to calculate net periodic pension benefit costs in 2022. Our discount rates for service and interest costs, respectively, were updated to 4.30% and 3.64% from 2.85% and 1.90% at January 1, 2022. The expected return on assets assumption was updated to 5.70% from 4.80% at January 1, 2022.

Variable Interest Entities

Variable Interest Entities	6 Months Ended
	Jun. 30, 2022
Variable Interest Entities [Abstract]
Variable Interest Entities	Variable Interest Entities A VIE is an entity in which the controlling interest is determined through means other than a majority voting interest. We control decisions that are significant to Rosewater and Indiana Crossroads Wind's ongoing operations and economic results. Therefore, we have concluded that we are the primary beneficiary and have consolidated both. Members of the respective joint ventures are NIPSCO (who is the managing member) and tax equity partners. Earnings, tax attributes and cash flows are allocated to both NIPSCO and the tax equity partner in varying percentages over the life of the partnership. Once the tax equity partner has earned their negotiated rate of return and we have reached the agreed upon contractual date, NIPSCO has the option to purchase at fair market value from the tax equity partner the remaining interest in the respective joint venture. NIPSCO has an obligation to purchase, through a PPA at established market rates, 100% of the electricity generated by the joint ventures. Rosewater Rosewater owns and operates 102 MW of nameplate capacity wind generation assets. NIPSCO and the tax equity partner have made total contributions of $170.1 million. NIPSCO and the tax equity partner contributed cash, and NIPSCO also assumed an obligation to the developer of the wind generation assets representing the remaining economic interest, which comes due in 2023. The obligation to developer is included within "Other accruals" on the Condensed Consolidated Balance Sheets (unaudited). The developer of the facility is not a partner in the joint venture for federal income tax purposes and does not receive any share of earnings, tax attributes, or cash flows of Rosewater. Indiana Crossroads Wind Indiana Crossroads Wind owns and operates 302 MW of nameplate capacity wind generation assets. NIPSCO and the tax equity partner have made total contributions of $511.8 million. NIPSCO and the tax equity partner contributed cash, and NIPSCO also assumed an obligation to the developer of the wind generation assets representing the remaining economic interest, which comes due in 2023. The obligation to developer is included within "Other accruals" on the Condensed Consolidated Balance Sheets (unaudited). The developer of the facility is not a partner in the joint venture for federal income tax purposes and does not receive any share of earnings, tax attributes, or cash flows of Indiana Crossroads Wind. The following table displays the noncontrolling interest in consolidated subsidiaries included in the Condensed Consolidated Balance Sheets (unaudited): (in millions) June 30, 2022 December 31, 2021 Rosewater $ 83.9 $ 88.2 Indiana Crossroads Wind 231.9 237.4 Total $ 315.8 $ 325.6 The following table displays the Net income (loss) attributable to noncontrolling interest included in the Condensed Statements of Consolidated Income (unaudited): Three Months Ended Six Months Ended (in millions) 2022 2021 2022 2021 Rosewater $ (4.0) $ (3.4) $ (2.9) $ (2.4) Indiana Crossroads Wind (7.2) — (3.8) — Total $ (11.2) $ (3.4) $ (6.7) $ (2.4) We did not provide any financial or other support during the quarter that was not previously contractually required, nor do we expect to provide such support in the future. Our Condensed Consolidated Balance Sheets (unaudited) included the following assets and liabilities associated with VIEs. (in millions) June 30, 2022 December 31, 2021 Rosewater Indiana Crossroads Wind Rosewater Indiana Crossroads Wind Net Property, Plant and Equipment $ 167.3 $ 517.3 $ 170.1 $ 525.8 Current assets 7.8 12.6 6.2 8.1 Total assets (1) 175.1 529.9 176.3 533.9 Current liabilities 3.6 3.9 2.5 7.5 Asset retirement obligations 5.8 15.0 5.7 14.8 Total liabilities $ 9.4 $ 18.9 $ 8.2 $ 22.3 (1) The assets of Rosewater and Indiana Crossroads represent assets of a consolidated VIE that can be used only to settle obligations of the respective consolidated VIE. The creditors of the liabilities of Rosewater and Indiana Crossroads do not have recourse, to the general credit of the primary beneficiary.

Long-Term Debt

Long-Term Debt	6 Months Ended
	Jun. 30, 2022
Long-Term Debt, Current and Noncurrent [Abstract]
Long-term Debt	Long-Term Debt On April 1, 2022, we repaid $20.0 million of 7.99% medium term notes at maturity. The remaining $29.0 million of 7.99% medium term notes outstanding June 30, 2022 and December 31, 2021 are expected to be repaid in May 2027 at maturity. On June 10, 2022, we completed the issuance and sale of $350.0 million of 5.00% senior unsecured notes maturing in 2052, which resulted in approximately $344.6 million of net proceeds after discount and debt issuance costs.

Short-Term Borrowings

Short-Term Borrowings	6 Months Ended
	Jun. 30, 2022
Short-Term Debt [Abstract]
Short-Term Borrowings	Short-Term Borrowings We generate short-term borrowings through several sources, described in further detail below. Revolving Credit Facility. We maintain a revolving credit facility to fund ongoing working capital requirements, including the provision of liquidity support for our commercial paper program, provide for issuance of letters of credit and also for general corporate purposes. Our revolving credit facility has a program limit of $1.85 billion and is comprised of a syndicate of banks. On February 18, 2022, we extended the termination date of our revolving credit facility to February 18, 2027. We had no outstanding borrowings under this facility as of June 30, 2022 and December 31, 2021. Commercial Paper Program. Our commercial paper program has a program limit of up to $1.5 billion. We had $270.0 million and $560.0 million of commercial paper outstanding with weighted-average interest rates of 2.00% and 0.24% as of June 30, 2022 and December 31, 2021, respectively. Accounts Receivable Transfer Programs. Columbia of Ohio, NIPSCO and Columbia of Pennsylvania each maintain a receivables agreement whereby they may transfer their customer accounts receivables to third-party financial institutions through wholly owned and consolidated special purpose entities. The three agreements expire between August 2022 and May 2023 and may be further extended if mutually agreed to by the parties thereto. All receivables transferred to third parties are valued at face value, which approximates fair value due to their short-term nature. The amount of the undivided percentage ownership interest in the accounts receivables transferred is determined in part by required loss reserves under the agreements. Transfers of accounts receivable are accounted for as secured borrowings resulting in the recognition of short-term borrowings on the Condensed Consolidated Balance Sheets (unaudited). As of June 30, 2022, the maximum amount of debt that could be recognized related to our accounts receivable programs is $285.0 million. We had $285.0 million and zero short-term borrowings related to the securitization transactions as of June 30, 2022 and December 31, 2021, respectively. For the six months ended June 30, 2022 and 2021, $285.0 million and zero, respectively, were recorded as cash flows from financing activities related to the change in short-term borrowings due to securitization transactions. For the accounts receivable transfer programs, we pay used facility fees for amounts borrowed, unused commitment fees for amounts not borrowed, and upfront renewal fees. Fees associated with the securitization transactions were $0.7 million and $0.4 million for the three months ended June 30, 2022 and 2021, respectively and $1.0 million and $0.8 million for the six months ended June 30, 2022 and 2021, respectively. Columbia of Ohio, NIPSCO and Columbia of Pennsylvania remain responsible for collecting on the receivables securitized, and the receivables cannot be transferred to another party. Items listed above are presented net in the Condensed Statements of Consolidated Cash Flows (unaudited) as their maturities are less than 90 days.

Other Commitments And Contingen

Other Commitments And Contingencies	6 Months Ended
	Jun. 30, 2022
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	Other Commitments and Contingencies A. Guarantees and Indemnities. We and certain of our subsidiaries enter into various agreements providing financial or performance assurance to third parties on behalf of certain subsidiaries as a part of normal business. Such agreements include guarantees and stand-by letters of credit. These agreements are entered into primarily to support or enhance the creditworthiness otherwise attributed to a subsidiary on a stand-alone basis, thereby facilitating the extension of sufficient credit to accomplish the subsidiaries' intended commercial purposes. As of June 30, 2022 and December 31, 2021, we had issued stand-by letters of credit of $14.7 million and $18.9 million, respectively. We provide guarantees related to our future performance under BTAs for our renewable generation projects. At June 30, 2022 and December 31, 2021, our guarantees for BTAs totaled $485.2 million and $288.9 million, respectively. As of August 2022, the amount of the guarantees increased to $796.5 million in accordance with the Dunn's Bridge II and Indiana Crossroads Solar BTAs. The amount of each guaranty will fluctuate upon the completion of the various steps outlined in each BTA. See ''- D. Other Matters - Generation Transition,'' below for more information. B. Legal Proceedings. On September 13, 2018, a series of fires and explosions occurred in Lawrence, Andover, and North Andover, Massachusetts related to the delivery of natural gas by Columbia of Massachusetts (the "Greater Lawrence Incident"). We have been subject to inquiries and investigations by government authorities and regulatory agencies regarding the Greater Lawrence Incident. On February 26, 2020, the Company and Columbia of Massachusetts entered into agreements with the U.S. Attorney’s Office for the District of Massachusetts to resolve the U.S. Attorney’s Office’s investigation relating to the Greater Lawrence Incident, as described below. The Company and Columbia of Massachusetts entered into an agreement with the Massachusetts Attorney General’s Office (among other parties) to resolve the Massachusetts DPU and the Massachusetts Attorney General’s Office investigations, that was approved by the Massachusetts DPU on October 7, 2020 as part of the sale of the Massachusetts Business to Eversource. U.S. Department of Justice Investigation. On February 26, 2020, the Company and Columbia of Massachusetts entered into agreements with the U.S. Attorney's Office to resolve the U.S. Attorney's Office's investigation relating to the Greater Lawrence Incident. Columbia of Massachusetts agreed to plead guilty in the United States District Court for the District of Massachusetts (the ''Court'') to violating the Natural Gas Pipeline Safety Act (the ''Plea Agreement''), and the Company entered into a Deferred Prosecution Agreement (the ''DPA''). On March 9, 2020, Columbia of Massachusetts entered its guilty plea pursuant to the Plea Agreement. The Court sentenced Columbia of Massachusetts on June 23, 2020, in accordance with the terms of the Plea Agreement (as modified). On June 23, 2021, the Court terminated Columbia of Massachusetts' period of probation under the Plea Agreement, which marked the completion of all terms of the Plea Agreement. Under the DPA, the U.S. Attorney's Office agreed to defer prosecution of the Company in connection with the Greater Lawrence Incident for a three-year period (which three-year period may be extended for twelve (12) months upon the U.S. Attorney's Office's determination of a breach of the DPA) subject to certain obligations of the Company, including, but not limited to, the Company's agreement, as to each of the Company's subsidiaries involved in the distribution of gas through pipeline facilities in Massachusetts, Indiana, Ohio, Pennsylvania, Maryland, Kentucky and Virginia to implement and adhere to each of the recommendations from the NTSB stemming from the Greater Lawrence Incident. Pursuant to the DPA, if the Company complies with all of its obligations under the DPA, the U.S. Attorney's Office will not file any criminal charges against the Company related to the Greater Lawrence Incident. Private Actions. Various lawsuits, including several purported class action lawsuits, were filed by various affected residents or businesses in Massachusetts state courts against the Company and/or Columbia of Massachusetts in connection with the Greater Lawrence Incident. On March 12, 2020, the Court granted final approval of the settlement of the consolidated class action. With respect to claims not included in the consolidated class action, many of the asserted wrongful death and bodily injury claims have settled, and we continue to discuss potential settlements with remaining claimants. The outcomes and impacts of such private actions are uncertain at this time. Shareholder Derivative Lawsuit. On April 28, 2020, a shareholder derivative lawsuit was filed by the City of Detroit Police and Fire Retirement System in the United States District Court for the District of Delaware against certain of the Company's current and former directors, alleging state-law claims for breaches of fiduciary duty with respect to the pipeline safety management systems relating to the distribution of natural gas prior to the Greater Lawrence Incident and also including federal-law claims related to our proxy statement disclosures regarding our safety systems. The remedies sought included damages for the alleged breaches of fiduciary duty, corporate governance reforms, and restitution of any unjust enrichment. The defendants filed a motion to dismiss the lawsuit and oral argument was held on March 2, 2021. On March 9, 2021, the district court granted the defendants' motion to dismiss. It dismissed the federal-law claims with prejudice for failure to state a claim on which relief can be granted and declined to exercise jurisdiction over the state-law claims, which were dismissed without prejudice. Following the dismissal of the federal court action, on April 29, 2021, the same plaintiff filed a shareholder derivative lawsuit in the Delaware Court of Chancery against certain of our current and former directors. The new complaint alleged a single count for breach of fiduciary duty, and no longer alleged disclosure violations or breaches of federal securities laws. The complaint related to substantially the same matters as those alleged in the dismissed federal derivative complaint. The remedies sought included damages for the alleged breaches of fiduciary duty, corporate governance reforms, and restitution of compensation by the individual defendants. On May 19, 2021, the defendants filed a motion to dismiss the lawsuit, and on July 2, 2021, they filed their opening brief in support of the motion. On August 26, 2021, rather than respond to the defendants' motion to dismiss and opening brief, the plaintiff filed an amended complaint. Like the original complaint in the Delaware Court of Chancery, the amended complaint alleges a single count for breach of fiduciary duty, based on substantially similar allegations, and seeks substantially similar remedies. On September 10, 2021, the defendants filed a motion to dismiss. Briefing on the defendants' motion to dismiss was completed on January 10, 2022, and oral argument on the defendants' motion to dismiss took place on February 3, 2022. On June 30, 2022, the Court of Chancery issued a Memorandum Opinion granting the motion to dismiss. The deadline for the plaintiff to appeal the dismissal is August 12, 2022. Other Claims and Proceedings. We are also party to certain other claims, regulatory and legal proceedings arising in the ordinary course of business in each state in which we have operations, none of which we believe to be individually material at this time. Due to the inherent uncertainty of litigation, there can be no assurance that the resolution of any particular claim, proceeding or investigation would not have a material adverse effect on our results of operations, financial position or liquidity. If one or more other matters were decided against us, the effects could be material to our results of operations in the period in which we would be required to record or adjust the related liability and could also be material to our cash flows in the periods that we would be required to pay such liability. It is management's continued intent to address environmental issues in cooperation with regulatory authorities in such a manner as to achieve mutually acceptable compliance plans. However, there can be no assurance that fines and penalties will not be incurred. Management expects a majority of environmental assessment and remediation costs and asset retirement costs, further described below, to be recoverable through rates. As of June 30, 2022 and December 31, 2021, we had recorded a liability of $98.2 million and $91.1 million, respectively, to cover environmental remediation at various sites. This liability is included in "Other accruals" and "Other noncurrent liabilities" in the Condensed Consolidated Balance Sheets (unaudited). We recognize costs associated with environmental remediation obligations when the incurrence of such costs is probable and the amounts can be reasonably estimated. The original estimates for remediation activities may differ materially from the amount ultimately expended. The actual future expenditures depend on many factors, including laws and regulations, the nature and extent of impact and the method of remediation. These expenditures are not currently estimable at some sites. We periodically adjust our liability as information is collected and estimates become more refined. CERCLA. Our subsidiaries are potentially responsible parties at waste disposal sites under CERCLA and similar state laws. Under CERCLA, each potentially responsible party can be held jointly, severally and strictly liable for the remediation costs as the EPA, or state, can allow the parties to pay for remedial action or perform remedial action themselves and request reimbursement from the potentially responsible parties. Our affiliates have retained CERCLA environmental liabilities, including remediation liabilities, associated with certain current and former operations. At this time, NIPSCO cannot estimate the full cost of remediating properties that have not yet been investigated, but it is possible that the future costs could be material to the Condensed Consolidated Financial Statements (unaudited). MGP. We maintain a program to identify and investigate former MGP sites where Gas Distribution Operations subsidiaries or predecessors may have liability. The program has identified 53 such sites where liability is probable. Remedial actions at many of these sites are being overseen by state or federal environmental agencies through consent agreements or voluntary remediation agreements. We utilize a probabilistic model to estimate our future remediation costs related to MGP sites. The model was prepared with the assistance of a third party and incorporates our experience and general industry experience with remediating MGP sites. We complete an annual refresh of the model in the second quarter of each fiscal year. No material changes to the estimated future remediation costs were noted as a result of the refresh completed as of June 30, 2022. Our total estimated liability related to the facilities subject to remediation was $91.9 million and $85.1 million at June 30, 2022 and December 31, 2021, respectively. The liability represents our best estimate of the probable cost to remediate the MGP sites. We believe that it is reasonably possible that remediation costs could vary by as much as $17 million in addition to the costs noted above. Remediation costs are estimated based on the best available information, applicable remediation standards at the balance sheet date and experience with similar facilities. CCRs. We are in compliance with the EPA's final rule for the regulation of CCRs. The CCR rule also resulted in revisions to previously recorded legal obligations associated with the retirement of certain NIPSCO facilities. The actual asset retirement costs related to the CCR rule may vary substantially from the estimates used to record the increased asset retirement obligation due to the uncertainty about the requirements that will be established by environmental authorities, compliance strategies that will be used and the preliminary nature of available data used to estimate costs. As allowed by the rule, NIPSCO will continue to collect data over time to determine the specific compliance solutions and associated costs and, as a result, the actual costs may vary. NIPSCO will also continue to work with the EPA and the Indiana Department of Environmental Management to obtain administrative approvals associated with the CCR rule. In the event that the approvals are not obtained, future operations could be impacted. We cannot estimate the likelihood that the agencies will deny approvals or the financial impact on us if these approvals are not obtained. Generation Transition.

Accumulated Other Comprehensive

Accumulated Other Comprehensive Loss	6 Months Ended
	Jun. 30, 2022
Other Comprehensive Income (Loss), Tax [Abstract]
Accumulated Other Comprehensive Loss	Accumulated Other Comprehensive Loss The following tables display the components of Accumulated Other Comprehensive Loss: (in millions) Gains and Losses on Securities (1) Gains and Losses on Cash Flow Hedges (1) Pension and OPEB Items (1) Accumulated (1) Balance as of April 1, 2022 $ (3.6) $ (75.5) $ (6.3) $ (85.4) Other comprehensive income (loss) before reclassifications (3.9) 55.9 (3.3) 48.7 Amounts reclassified from accumulated other comprehensive income (loss) — 0.1 0.8 0.9 Net current-period other comprehensive income (loss) (3.9) 56.0 (2.5) 49.6 Balance as of June 30, 2022 $ (7.5) $ (19.5) $ (8.8) $ (35.8) (1) All amounts are net of tax. Amounts in parentheses indicate debits. (in millions) Gains and Losses on Securities (1) Gains and Losses on Cash Flow Hedges (1) Pension and OPEB Items (1) Accumulated Other Comprehensive Loss (1) Balance as of January 1, 2022 $ 2.1 $ (122.5) $ (6.4) $ (126.8) Other comprehensive income (loss) before reclassifications (9.8) 102.9 (3.3) 89.8 Amounts reclassified from accumulated other comprehensive loss 0.2 0.1 0.9 1.2 Net current-period other comprehensive income (loss) (9.6) 103.0 (2.4) 91.0 Balance as of June 30, 2022 $ (7.5) $ (19.5) $ (8.8) $ (35.8) (1) All amounts are net of tax. Amounts in parentheses indicate debits. (in millions) Gains and Losses on Securities (1) Gains and Losses on Cash Flow Hedges (1) Pension and OPEB Items (1) Accumulated (1) Balance as of April 1, 2021 $ 3.5 $ (63.3) $ (15.7) $ (75.5) Other comprehensive income (loss) before reclassifications 0.8 (49.8) 0.1 (48.9) Amounts reclassified from accumulated other comprehensive loss 0.1 — 0.7 0.8 Net current-period other comprehensive income (loss) 0.9 (49.8) 0.8 (48.1) Balance as of June 30, 2021 $ 4.4 $ (113.1) $ (14.9) $ (123.6) (1) All amounts are net of tax. Amounts in parentheses indicate debits. (in millions) Gains and Losses on Securities (1) Gains and Losses on Cash Flow Hedges (1) Pension and OPEB Items (1) Accumulated Other Comprehensive Loss (1 ) Balance as of January 1, 2021 $ 6.0 $ (147.9) $ (14.8) $ (156.7) Other comprehensive income (loss) before reclassifications (1.4) 34.8 (1.3) 32.1 Amounts reclassified from accumulated other comprehensive loss (0.2) — 1.2 1.0 Net current-period other comprehensive income (loss) (1.6) 34.8 (0.1) 33.1 Balance as of June 30, 2021 $ 4.4 $ (113.1) $ (14.9) $ (123.6) (1) All amounts are net of tax. Amounts in parentheses indicate debits.

Other, Net

Other, Net	6 Months Ended
	Jun. 30, 2022
Other, Net [Abstract]
Other, Net	Other, Net The following table displays the components of Other, Net included on the Condensed Statements of Consolidated Income (unaudited): Three Months Ended Six Months Ended (in millions) 2022 2021 2022 2021 Interest income $ 0.6 $ 0.7 $ 1.5 $ 1.6 AFUDC equity 4.0 3.4 7.0 4.9 Pension and other postretirement non-service benefit 4.7 8.6 12.3 17.1 Miscellaneous (0.3) (0.3) (0.9) (0.7) Total Other, net $ 9.0 $ 12.4 $ 19.9 $ 22.9

Business Segment Information

Business Segment Information	6 Months Ended
	Jun. 30, 2022
Segment Reporting [Abstract]
Business Segment Information	Business Segment Information Our operations are divided into two primary reportable segments, the Gas Distribution Operations and the Electric Operations segments. The remainder of our operations, which are not significant enough on a stand-alone basis to warrant treatment as an operating segment, are presented as "Corporate and Other" and primarily are comprised of interest expense on holding company debt, and unallocated corporate costs and activities. Refer to Note 3, "Revenue Recognition," for additional information on our segments and their sources of revenues. The following table provides information about our reportable segments. We use operating income as our primary measurement for each of the reported segments and make decisions on finance, dividends and taxes at the corporate level on a consolidated basis. Segment revenues include intersegment sales to affiliated subsidiaries, which are eliminated in consolidation. Affiliated sales are recognized on the basis of prevailing market, regulated prices or at levels provided for under contractual agreements. Operating income is derived from revenues and expenses directly associated with each segment. Three Months Ended Six Months Ended (in millions) 2022 2021 2022 2021 Operating Revenues Gas Distribution Operations Unaffiliated $ 741.1 $ 574.3 $ 2,177.8 $ 1,710.1 Intersegment 3.2 3.0 6.3 6.1 Total 744.3 577.3 2,184.1 1,716.2 Electric Operations Unaffiliated 437.1 403.5 867.2 806.0 Intersegment 0.2 0.2 0.4 0.4 Total 437.3 403.7 867.6 806.4 Corporate and Other Unaffiliated 5.0 8.2 11.5 15.5 Intersegment 120.7 117.4 234.2 221.3 Total 125.7 125.6 245.7 236.8 Eliminations (124.1) (120.6) (240.9) (227.8) Consolidated Operating Revenues $ 1,183.2 $ 986.0 $ 3,056.5 $ 2,531.6 Operating Income (Loss) Gas Distribution Operations $ 80.6 $ 61.2 $ 591.4 $ 408.1 Electric Operations 72.6 79.6 171.8 167.5 Corporate and Other (9.9) 1.4 (19.6) (0.2) Consolidated Operating Income $ 143.3 $ 142.2 $ 743.6 $ 575.4

Revenue Recognition (Tables)

Revenue Recognition (Tables)	6 Months Ended
	Jun. 30, 2022
Revenue from Contract with Customer [Abstract]
Disaggregation of Revenue	The tables below reconcile revenue disaggregation by customer class to segment revenue, as well as to revenues reflected on the Condensed Statements of Consolidated Income (unaudited): Three Months Ended June 30, 2022 (in millions) Gas Distribution Operations Electric Operations Corporate and Other (2) Total Customer Revenues (1) Residential $ 465.0 $ 137.0 $ — $ 602.0 Commercial 160.6 134.7 — 295.3 Industrial 48.1 138.7 — 186.8 Off-system 59.1 — — 59.1 Miscellaneous 8.6 4.7 — 13.3 Total Customer Revenues $ 741.4 $ 415.1 $ — $ 1,156.5 Other Revenues (0.3) 22.0 5.0 26.7 Total Operating Revenues $ 741.1 $ 437.1 $ 5.0 $ 1,183.2 (1) Customer revenue amounts exclude intersegment revenues. See Note 18, "Business Segment Information," for discussion of intersegment revenues. (2) Other revenues primarily related to the Transition Services Agreement entered into in connection with the sale of the Massachusetts Business. Three Months Ended June 30, 2021 (in millions) Gas Distribution Operations Electric Operations Corporate and Other (2) Total Customer Revenues (1) Residential $ 378.6 $ 131.9 $ — $ 510.5 Commercial 125.4 130.0 — 255.4 Industrial 44.0 119.0 — 163.0 Off-system 17.0 — — 17.0 Miscellaneous 4.9 1.4 0.2 6.5 Total Customer Revenues $ 569.9 $ 382.3 $ 0.2 $ 952.4 Other Revenues 4.4 21.2 8.0 33.6 Total Operating Revenues $ 574.3 $ 403.5 $ 8.2 $ 986.0 (1) Customer revenue amounts exclude intersegment revenues. See Note 18, "Business Segment Information," for discussion of intersegment revenues. (2) Other revenues primarily related to the Transition Services Agreement entered into in connection with the sale of the Massachusetts Business. Six months ended June 30, 2022 (in millions) Gas Distribution Operations Electric Operations Corporate and Other (2) Total Customer Revenues (1) Residential $ 1,441.9 $ 275.5 $ — $ 1,717.4 Commercial 517.1 269.2 — 786.3 Industrial 115.9 268.5 — 384.4 Off-system 77.8 — — 77.8 Miscellaneous 22.6 8.3 — 30.9 Total Customer Revenues $ 2,175.3 $ 821.5 $ — $ 2,996.8 Other Revenues 2.5 45.7 11.5 59.7 Total Operating Revenues $ 2,177.8 $ 867.2 $ 11.5 $ 3,056.5 (1) Customer revenue amounts exclude intersegment revenues. See Note 18, "Business Segment Information," for discussion of intersegment revenues. (2) Other revenues related to the Transition Services Agreement entered into in connection with the sale of the Massachusetts Business. Six months ended June 30, 2021 (in millions) Gas Distribution Operations Electric Operations Corporate and Other (2) Total Customer Revenues (1) Residential $ 1,152.1 $ 261.1 $ — $ 1,413.2 Commercial 396.9 252.8 — 649.7 Industrial 101.9 241.9 — 343.8 Off-system 31.4 — — 31.4 Miscellaneous 14.7 5.7 0.4 20.8 Total Customer Revenues $ 1,697 $ 761.5 $ 0.4 $ 2,458.9 Other Revenues 13.1 44.5 15.1 72.7 Total Operating Revenues $ 1,710.1 $ 806.0 $ 15.5 $ 2,531.6 (1) Customer revenue amounts exclude intersegment revenues. See Note 18, "Business Segment Information," for discussion of intersegment revenues. (2) Other revenues related to the Transition Services Agreement entered into in connection with the sale of the Massachusetts Business.
Customer Accounts Receivable	The opening and closing balances of customer receivables for the six months ended June 30, 2022 are presented in the table below. We had no significant contract assets or liabilities during the period. Additionally, we have not incurred any significant costs to obtain or fulfill contracts. (in millions) Customer Accounts Receivable, Billed (less reserve) Customer Accounts Receivable, Unbilled (less reserve) Balance as of December 31, 2021 $ 459.6 $ 337.0 Balance as of June 30, 2022 473.7 216.9
Accounts Receivable, Allowance for Credit Loss	A rollforward of our allowance for credit losses as of June 30, 2022 and December 31, 2021 are presented in the table below: ( in millions ) Gas Distribution Operations Electric Operations Corporate and Other Total Balance as of January 1, 2022 $ 18.9 $ 3.8 $ 0.8 $ 23.5 Current period provisions 14.8 4.2 — 19.0 Write-offs charged against allowance (21.3) (2.7) — (24.0) Recoveries of amounts previously written off 7.3 0.3 — 7.6 Balance as of June 30, 2022 $ 19.7 $ 5.6 $ 0.8 $ 26.1 ( in millions ) Gas Distribution Operations Electric Operations Corporate and Other Total Balance as of January 1, 2021 $ 41.8 $ 9.7 $ 0.8 $ 52.3 Current period provisions 5.8 1.4 — 7.2 Write-offs charged against allowance (46.7) (7.7) — (54.4) Recoveries of amounts previously written off 18.0 0.4 — 18.4 Balance as of December 31, 2021 $ 18.9 $ 3.8 $ 0.8 $ 23.5

Earnings Per Share (Tables)

Earnings Per Share (Tables)	6 Months Ended
	Jun. 30, 2022
Earnings Per Share [Abstract]
Schedule of Earnings Per Share, Basic and Diluted	The following table presents the calculation of our basic and diluted EPS: Three Months Ended Six Months Ended (in millions, except per share amounts) 2022 2021 2022 2021 Numerator: Net Income Available to Common Shareholders - Basic $ 53.2 $ 46.5 $ 466.2 $ 328.2 Dilutive effect of Equity Units 0.5 0.4 1.0 0.4 Net Income Available to Common Shareholders - Diluted $ 53.7 $ 46.9 $ 467.2 $ 328.6 Denominator: Average common shares outstanding - Basic 406.4 393.0 406.2 392.8 Dilutive potential common shares: Equity Units purchase contracts 27.9 28.2 28.5 14.2 Equity Units purchase contract payment balance 3.3 — 3.6 — Shares contingently issuable under employee stock plans 1.0 0.8 1.0 0.7 Shares restricted under employee stock plans 0.4 0.3 0.4 0.3 ATM forward agreements 1.2 0.6 1.1 0.5 Average Common Shares - Diluted 440.2 422.9 440.8 408.5 Earnings per common share: Basic $ 0.13 $ 0.12 $ 1.15 $ 0.84 Diluted $ 0.12 $ 0.11 $ 1.06 $ 0.80

Equity (Tables)

Equity (Tables)	6 Months Ended
	Jun. 30, 2022
Equity [Abstract]
Schedule of Stock by Class - Preferred	The following table displays preferred dividends declared for the period by outstanding series of shares: Three Months Ended Six Months Ended June 30, December 31, 2022 2021 2022 2021 2022 2021 (in millions except shares and per share amounts) Liquidation Preference Per Share Shares Dividends Declared Per Share Outstanding 5.650% Series A $ 1,000.00 400,000 — — 28.25 28.25 $ 393.9 $ 393.9 6.500% Series B $ 25,000.00 20,000 406.25 406.25 1,218.75 1,218.75 $ 486.1 $ 486.1 Series C (1) $ 1,000.00 862,500 — — — — $ 666.5 $ 666.5 (1) The Series C Mandatory Convertible Preferred Stock initially will not bear any dividends. We recorded the initial present value of the purchase contract payments as a liability with a corresponding reduction to preferred stock.

Risk Management Activities (Tab

Risk Management Activities (Tables)	6 Months Ended
	Jun. 30, 2022
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Schedule of Derivative Instruments in Statement of Financial Position, Fair Value	Risk management assets and liabilities on our derivatives are presented on the Condensed Consolidated Balance Sheets (unaudited) as shown below: June 30, 2022 December 31, 2021 (in millions) Assets Liabilities Assets Liabilities Current (1) Derivatives designated as hedging instruments $ — $ 9.5 $ — $ 136.4 Derivatives not designated as hedging instruments 33.7 0.5 10.6 0.4 Total $ 33.7 $ 10.0 $ 10.6 $ 136.8 Noncurrent (2) Derivatives designated as hedging instruments $ — $ — $ — $ — Derivatives not designated as hedging instruments 71.9 1.5 13.8 7.4 Total $ 71.9 $ 1.5 $ 13.8 $ 7.4 (1) Current assets and liabilities are presented in "Prepayments and other" and "Other accruals", respectively, on the Condensed Consolidated Balance Sheets (unaudited). (2) Noncurrent assets and liabilities are presented in "Deferred charges and other" and "Other noncurrent liabilities", respectively, on the Condensed Consolidated Balance Sheets (unaudited).
Derivative Instruments, Gain (Loss)	The following table summarizes the gains and losses associated with the commodity price risk programs: (in millions) June 30, 2022 December 31, 2021 Regulatory Assets Losses on commodity price risk programs $ 6.8 $ 9.6 Regulatory Liabilities Gains on commodity price risk programs 127.7 34.2
Reclassification out of Accumulated Other Comprehensive Income	Cash flow hedges included in "Accumulated other comprehensive loss" on the Condensed Consolidated Balance Sheets (unaudited) were: (in millions) AOCI (1) Amounts Expected to be Reclassified to Earnings During the Next 12 Months (1) Maximum Term Interest Rate $ (19.5) (0.2) 365 months (1) All amounts are net of tax.

Fair Value (Tables)

Fair Value (Tables)	6 Months Ended
	Jun. 30, 2022
Fair Value Disclosures [Abstract]
Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis	The following tables present financial assets and liabilities measured and recorded at fair value on our Condensed Consolidated Balance Sheets (unaudited) on a recurring basis and their level within the fair value hierarchy as of June 30, 2022 and December 31, 2021: Recurring Fair Value Measurements (in millions) Quoted Prices in Significant Significant Balance as of June 30, 2022 Assets Risk management assets $ — $ 105.6 $ — $ 105.6 Available-for-sale debt securities — 149.8 — 149.8 Total $ — $ 255.4 $ — $ 255.4 Liabilities Risk management liabilities $ — $ 11.5 $ — $ 11.5 Total $ — $ 11.5 $ — $ 11.5 Recurring Fair Value Measurements (in millions) Quoted Prices in Significant Significant Balance as of December 31, 2021 Assets Risk management assets $ — $ 24.4 $ — $ 24.4 Available-for-sale debt securities — 171.8 — 171.8 Total $ — $ 196.2 $ — $ 196.2 Liabilities Risk management liabilities $ — $ 144.2 $ — $ 144.2 Total $ — $ 144.2 $ — $ 144.2
Debt Securities, Available-for-sale	The amortized cost, gross unrealized gains and losses, allowance for credit losses, and fair value of available-for-sale securities at June 30, 2022 and December 31, 2021 were: June 30, 2022 (in millions) Amortized Gross Unrealized Gains Gross Unrealized Losses (1) Allowance for Credit Losses Fair Available-for-sale debt securities U.S. Treasury debt securities $ 51.1 $ — $ (2.4) $ — $ 48.7 Corporate/Other debt securities 109.1 0.1 (7.1) (1.0) 101.1 Total $ 160.2 $ 0.1 $ (9.5) $ (1.0) $ 149.8 December 31, 2021 (in millions) Amortized Gross Unrealized Gains Gross Unrealized Losses (2) Allowance for Credit Losses Fair Available-for-sale debt securities U.S. Treasury debt securities $ 52.8 $ 0.1 $ (0.4) $ — $ 52.5 Corporate/Other debt securities 116.5 3.7 (0.7) (0.2) 119.3 Total $ 169.3 $ 3.8 $ (1.1) $ (0.2) $ 171.8 (1) Fair value of U.S. Treasury debt securities and Corporate/Other debt securities in an unrealized loss position without an allowance for credit losses is $47.0 million and $89.9 million, respectively, at June 30, 2022. (2) Fair value of U.S. Treasury debt securities and Corporate/Other debt securities in an unrealized loss position without an allowance for credit losses is $36.2 million and $35.4 million, respectively, at December 31, 2021.
Carrying Amount And Estimated Fair Values Of Financial Instruments	The carrying amount and estimated fair values of these financial instruments were as follows: (in millions) Carrying Amount as of June 30, 2022 Estimated Fair Value as of June 30, 2022 Carrying Amount as of Dec. 31, 2021 Estimated Fair Value as of Dec. 31, 2021 Long-term debt (including current portion) $ 9,557.5 $ 8,770.0 $ 9,241.5 $ 10,415.7

Pension And Other Postretirem_2

Pension And Other Postretirement Benefits (Tables)	6 Months Ended
	Jun. 30, 2022
Pension and Other Postretirement Benefits Cost (Reversal of Cost) [Abstract]
Components Of The Plans' Net Periodic Benefits Cost	The following table provides the components of the plans' actuarially determined net periodic benefit cost for the three and six months ended June 30, 2022 and 2021: Pension Benefits OPEB Three Months Ended June 30, (in millions) 2022 2021 2022 2021 Components of Net Periodic Benefit (Income) Cost (1) Service cost $ 7.0 $ 7.5 $ 1.6 $ 1.5 Interest cost 9.8 7.9 3.0 2.5 Expected return on assets (22.8) (25.3) (4.0) (3.8) Amortization of prior service credit — — (0.6) (0.6) Recognized actuarial loss 4.8 5.5 0.7 1.2 Settlement loss 6.3 3.3 — — Total Net Periodic Benefit (Income) Cost $ 5.1 $ (1.1) $ 0.7 $ 0.8 (1) The service cost component and all non-service cost components of net periodic benefit (income) cost are presented in "Operation and maintenance" and "Other, net," respectively, on the Condensed Statements of Consolidated Income (unaudited). Pension Benefits OPEB Six Months Ended June 30, (in millions) 2022 2021 2022 2021 Components of Net Periodic Benefit (Income) Cost (1) Service cost $ 14.1 $ 15.1 $ 3.2 $ 3.0 Interest cost 19.2 15.6 6.0 5.0 Expected return on assets (45.7) (51.1) (8.0) (7.6) Amortization of prior service credit — — (1.2) (1.2) Recognized actuarial loss 9.3 10.8 1.4 2.4 Settlement loss 6.3 6.6 — — Total Net Periodic Benefit (Income) Cost $ 3.2 $ (3.0) $ 1.4 $ 1.6 (1) The service cost component and all non-service cost components of net periodic benefit (income) cost are presented in "Operation and maintenance" and "Other, net," respectively, on the Condensed Statements of Consolidated Income (unaudited).

Variable Interest Entities (Tab

Variable Interest Entities (Tables)	6 Months Ended
	Jun. 30, 2022
Variable Interest Entities [Abstract]
Redeemable Noncontrolling Interest	The following table displays the noncontrolling interest in consolidated subsidiaries included in the Condensed Consolidated Balance Sheets (unaudited): (in millions) June 30, 2022 December 31, 2021 Rosewater $ 83.9 $ 88.2 Indiana Crossroads Wind 231.9 237.4 Total $ 315.8 $ 325.6
Income Amounts Attributable to Noncontrolling Interest	The following table displays the Net income (loss) attributable to noncontrolling interest included in the Condensed Statements of Consolidated Income (unaudited): Three Months Ended Six Months Ended (in millions) 2022 2021 2022 2021 Rosewater $ (4.0) $ (3.4) $ (2.9) $ (2.4) Indiana Crossroads Wind (7.2) — (3.8) — Total $ (11.2) $ (3.4) $ (6.7) $ (2.4)
Variable Interest Entities Assets and Liabilities	Our Condensed Consolidated Balance Sheets (unaudited) included the following assets and liabilities associated with VIEs. (in millions) June 30, 2022 December 31, 2021 Rosewater Indiana Crossroads Wind Rosewater Indiana Crossroads Wind Net Property, Plant and Equipment $ 167.3 $ 517.3 $ 170.1 $ 525.8 Current assets 7.8 12.6 6.2 8.1 Total assets (1) 175.1 529.9 176.3 533.9 Current liabilities 3.6 3.9 2.5 7.5 Asset retirement obligations 5.8 15.0 5.7 14.8 Total liabilities $ 9.4 $ 18.9 $ 8.2 $ 22.3 (1) The assets of Rosewater and Indiana Crossroads represent assets of a consolidated VIE that can be used only to settle obligations of the respective consolidated VIE. The creditors of the liabilities of Rosewater and Indiana Crossroads do not have recourse, to the general credit of the primary beneficiary.

Accumulated Other Comprehensi_2

Accumulated Other Comprehensive Loss (Tables)	6 Months Ended
	Jun. 30, 2022
Other Comprehensive Income (Loss), Tax [Abstract]
Components Of Accumulated Other Comprehensive Loss	The following tables display the components of Accumulated Other Comprehensive Loss: (in millions) Gains and Losses on Securities (1) Gains and Losses on Cash Flow Hedges (1) Pension and OPEB Items (1) Accumulated (1) Balance as of April 1, 2022 $ (3.6) $ (75.5) $ (6.3) $ (85.4) Other comprehensive income (loss) before reclassifications (3.9) 55.9 (3.3) 48.7 Amounts reclassified from accumulated other comprehensive income (loss) — 0.1 0.8 0.9 Net current-period other comprehensive income (loss) (3.9) 56.0 (2.5) 49.6 Balance as of June 30, 2022 $ (7.5) $ (19.5) $ (8.8) $ (35.8) (1) All amounts are net of tax. Amounts in parentheses indicate debits. (in millions) Gains and Losses on Securities (1) Gains and Losses on Cash Flow Hedges (1) Pension and OPEB Items (1) Accumulated Other Comprehensive Loss (1) Balance as of January 1, 2022 $ 2.1 $ (122.5) $ (6.4) $ (126.8) Other comprehensive income (loss) before reclassifications (9.8) 102.9 (3.3) 89.8 Amounts reclassified from accumulated other comprehensive loss 0.2 0.1 0.9 1.2 Net current-period other comprehensive income (loss) (9.6) 103.0 (2.4) 91.0 Balance as of June 30, 2022 $ (7.5) $ (19.5) $ (8.8) $ (35.8) (1) All amounts are net of tax. Amounts in parentheses indicate debits. (in millions) Gains and Losses on Securities (1) Gains and Losses on Cash Flow Hedges (1) Pension and OPEB Items (1) Accumulated (1) Balance as of April 1, 2021 $ 3.5 $ (63.3) $ (15.7) $ (75.5) Other comprehensive income (loss) before reclassifications 0.8 (49.8) 0.1 (48.9) Amounts reclassified from accumulated other comprehensive loss 0.1 — 0.7 0.8 Net current-period other comprehensive income (loss) 0.9 (49.8) 0.8 (48.1) Balance as of June 30, 2021 $ 4.4 $ (113.1) $ (14.9) $ (123.6) (1) All amounts are net of tax. Amounts in parentheses indicate debits. (in millions) Gains and Losses on Securities (1) Gains and Losses on Cash Flow Hedges (1) Pension and OPEB Items (1) Accumulated Other Comprehensive Loss (1 ) Balance as of January 1, 2021 $ 6.0 $ (147.9) $ (14.8) $ (156.7) Other comprehensive income (loss) before reclassifications (1.4) 34.8 (1.3) 32.1 Amounts reclassified from accumulated other comprehensive loss (0.2) — 1.2 1.0 Net current-period other comprehensive income (loss) (1.6) 34.8 (0.1) 33.1 Balance as of June 30, 2021 $ 4.4 $ (113.1) $ (14.9) $ (123.6) (1) All amounts are net of tax. Amounts in parentheses indicate debits.

Other, Net (Tables)

Other, Net (Tables)	6 Months Ended
	Jun. 30, 2022
Other, Net [Abstract]
Schedule of Other Nonoperating Income (Expense)	The following table displays the components of Other, Net included on the Condensed Statements of Consolidated Income (unaudited): Three Months Ended Six Months Ended (in millions) 2022 2021 2022 2021 Interest income $ 0.6 $ 0.7 $ 1.5 $ 1.6 AFUDC equity 4.0 3.4 7.0 4.9 Pension and other postretirement non-service benefit 4.7 8.6 12.3 17.1 Miscellaneous (0.3) (0.3) (0.9) (0.7) Total Other, net $ 9.0 $ 12.4 $ 19.9 $ 22.9

Business Segment Information (T

Business Segment Information (Tables)	6 Months Ended
	Jun. 30, 2022
Segment Reporting [Abstract]
Schedule Of Operating Income Derived From Revenues And Expenses By Segment	Three Months Ended Six Months Ended (in millions) 2022 2021 2022 2021 Operating Revenues Gas Distribution Operations Unaffiliated $ 741.1 $ 574.3 $ 2,177.8 $ 1,710.1 Intersegment 3.2 3.0 6.3 6.1 Total 744.3 577.3 2,184.1 1,716.2 Electric Operations Unaffiliated 437.1 403.5 867.2 806.0 Intersegment 0.2 0.2 0.4 0.4 Total 437.3 403.7 867.6 806.4 Corporate and Other Unaffiliated 5.0 8.2 11.5 15.5 Intersegment 120.7 117.4 234.2 221.3 Total 125.7 125.6 245.7 236.8 Eliminations (124.1) (120.6) (240.9) (227.8) Consolidated Operating Revenues $ 1,183.2 $ 986.0 $ 3,056.5 $ 2,531.6 Operating Income (Loss) Gas Distribution Operations $ 80.6 $ 61.2 $ 591.4 $ 408.1 Electric Operations 72.6 79.6 171.8 167.5 Corporate and Other (9.9) 1.4 (19.6) (0.2) Consolidated Operating Income $ 143.3 $ 142.2 $ 743.6 $ 575.4

Recent Accounting Pronounceme_2

Recent Accounting Pronouncements (Details)	6 Months Ended
	Jun. 30, 2022
Accounting Standards Update 2020-04
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Accounting Standards Update	Accounting Standards Update 2020-04
Change in Accounting Principle, Accounting Standards Update, Adopted [true false]	false
Accounting Standards Update 2021-01
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Accounting Standards Update	Accounting Standards Update 2021-01
Change in Accounting Principle, Accounting Standards Update, Adopted [true false]	false
Accounting Standards Update 2021-10
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Accounting Standards Update	Accounting Standards Update 2021-10
Change in Accounting Principle, Accounting Standards Update, Adopted [true false]	false

Recently Adopted Accounting Pro

Recently Adopted Accounting Pronouncements (Details) - Accounting Standards Update 2020-06	6 Months Ended
	Jun. 30, 2022
Recently Adopted Accounting Pronouncements [Line Items]
Accounting Standards Update	Accounting Standards Update 2020-06
Change in Accounting Principle, Accounting Standards Update, Adopted [true false]	true

Revenue Recognition (Narrative)

Revenue Recognition (Narrative) (Details)	6 Months Ended
	Jun. 30, 2022
Revenue from Contract with Customer [Abstract]
Service Area By County	20

Revenue Recognition (Disaggrega

Revenue Recognition (Disaggregation of Revenue) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Disaggregation of Revenue [Line Items]
Customer revenues	$ 1,156.5	$ 952.4	$ 2,996.8	$ 2,458.9
Other revenues	26.7	33.6	59.7	72.7
Total Operating Revenues	1,183.2	986	3,056.5	2,531.6
Gas Distribution Operations
Disaggregation of Revenue [Line Items]
Customer revenues	741.4	569.9	2,175.3	1,697
Other revenues	(0.3)	4.4	2.5	13.1
Total Operating Revenues	741.1	574.3	2,177.8	1,710.1
Electric Operations
Disaggregation of Revenue [Line Items]
Customer revenues	415.1	382.3	821.5	761.5
Other revenues	22	21.2	45.7	44.5
Total Operating Revenues	437.1	403.5	867.2	806
Corporate and Other
Disaggregation of Revenue [Line Items]
Customer revenues	0	0.2	0	0.4
Other revenues	5	8	11.5	15.1
Total Operating Revenues	5	8.2	11.5	15.5
Residential
Disaggregation of Revenue [Line Items]
Customer revenues	602	510.5	1,717.4	1,413.2
Residential | Gas Distribution Operations
Disaggregation of Revenue [Line Items]
Customer revenues	465	378.6	1,441.9	1,152.1
Residential | Electric Operations
Disaggregation of Revenue [Line Items]
Customer revenues	137	131.9	275.5	261.1
Residential | Corporate and Other
Disaggregation of Revenue [Line Items]
Customer revenues	0	0	0	0
Commercial
Disaggregation of Revenue [Line Items]
Customer revenues	295.3	255.4	786.3	649.7
Commercial | Gas Distribution Operations
Disaggregation of Revenue [Line Items]
Customer revenues	160.6	125.4	517.1	396.9
Commercial | Electric Operations
Disaggregation of Revenue [Line Items]
Customer revenues	134.7	130	269.2	252.8
Commercial | Corporate and Other
Disaggregation of Revenue [Line Items]
Customer revenues	0	0	0	0
Industrial
Disaggregation of Revenue [Line Items]
Customer revenues	186.8	163	384.4	343.8
Industrial | Gas Distribution Operations
Disaggregation of Revenue [Line Items]
Customer revenues	48.1	44	115.9	101.9
Industrial | Electric Operations
Disaggregation of Revenue [Line Items]
Customer revenues	138.7	119	268.5	241.9
Industrial | Corporate and Other
Disaggregation of Revenue [Line Items]
Customer revenues	0	0	0	0
Off-system
Disaggregation of Revenue [Line Items]
Customer revenues	59.1	17	77.8	31.4
Off-system | Gas Distribution Operations
Disaggregation of Revenue [Line Items]
Customer revenues	59.1	17	77.8	31.4
Off-system | Electric Operations
Disaggregation of Revenue [Line Items]
Customer revenues	0	0	0	0
Off-system | Corporate and Other
Disaggregation of Revenue [Line Items]
Customer revenues	0	0	0	0
Miscellaneous
Disaggregation of Revenue [Line Items]
Customer revenues	13.3	6.5	30.9	20.8
Miscellaneous | Gas Distribution Operations
Disaggregation of Revenue [Line Items]
Customer revenues	8.6	4.9	22.6	14.7
Miscellaneous | Electric Operations
Disaggregation of Revenue [Line Items]
Customer revenues	4.7	1.4	8.3	5.7
Miscellaneous | Corporate and Other
Disaggregation of Revenue [Line Items]
Customer revenues	$ 0	$ 0.2	$ 0	$ 0.4

Revenue Recognition (Customer A

Revenue Recognition (Customer Accounts Receivable) (Details) - USD ($) $ in Millions	Jun. 30, 2022	Dec. 31, 2021
Revenue from Contract with Customer [Abstract]
Customer Accounts Receivable, Billed (Less Reserve)	$ 473.7	$ 459.6
Customer Accounts Receivable, Unbilled (Less Reserve)	$ 216.9	$ 337

Revenue Recognition Revenue Rec

Revenue Recognition Revenue Recognition (Allowance for Credit Losses) (Details) - USD ($) $ in Millions	6 Months Ended	12 Months Ended
	Jun. 30, 2022	Dec. 31, 2021	Dec. 31, 2020
Accounts Receivable Allowance For Credit Loss [Line Items]
Accounts Receivable, Allowance for Credit Loss	$ 26.1	$ 23.5	$ 52.3
Current period provisions	19	7.2
Write-offs charged against allowance	24	54.4
Recoveries of amounts previously written off	7.6	18.4
Gas Distribution Operations
Accounts Receivable Allowance For Credit Loss [Line Items]
Accounts Receivable, Allowance for Credit Loss	19.7	18.9	41.8
Current period provisions	14.8	5.8
Write-offs charged against allowance	21.3	46.7
Recoveries of amounts previously written off	7.3	18
Electric Operations
Accounts Receivable Allowance For Credit Loss [Line Items]
Accounts Receivable, Allowance for Credit Loss	5.6	3.8	9.7
Current period provisions	4.2	1.4
Write-offs charged against allowance	2.7	7.7
Recoveries of amounts previously written off	0.3	0.4
Corporate and Other
Accounts Receivable Allowance For Credit Loss [Line Items]
Accounts Receivable, Allowance for Credit Loss	0.8	0.8	$ 0.8
Current period provisions	0	0
Write-offs charged against allowance	0	0
Recoveries of amounts previously written off	$ 0	$ 0

Earnings Per Share (Narrative)

Earnings Per Share (Narrative) (Details)	Apr. 19, 2021 $ / shares
Equity Units
Earnings Per Share [Line Items]
Shares Issued, Price Per Share	$ 24.51

Earnings Per Share (Schedule of

Earnings Per Share (Schedule of Earnings Per Share, Basic and Diluted) (Details) - USD ($) shares in Millions, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Numerator
Net Income Available to Common Shareholders - Basic	$ 53.2	$ 46.5	$ 466.2	$ 328.2
Dilutive effect of Equity Units	0.5	0.4	1	0.4
Net Income Available to Common Shareholders - Diluted	$ 53.7	$ 46.9	$ 467.2	$ 328.6
Denominator
Basic Average Common Shares Outstanding	406.4	393	406.2	392.8
Dilutive potential common shares
Equity Units purchase contracts	27.9	28.2	28.5	14.2
Equity Units purchase contract payment balance	3.3	0	3.6	0
Shares contingently issuable under employee stock plans	1	0.8	1	0.7
Shares restricted under stock plans	0.4	0.3	0.4	0.3
ATM forward agreements	1.2	0.6	1.1	0.5
Diluted Average Common Shares	440.2	422.9	440.8	408.5

Equity (Narrative) (Details)

Equity (Narrative) (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Dec. 31, 2021	Apr. 19, 2021
Preferred Stock, Shares Authorized	20,000,000		20,000,000	20,000,000
Preferred Stock, Shares Outstanding	1,302,500		1,302,500	1,302,500
Preferred Stock, Par or Stated Value Per Share	$ 0.01		$ 0.01	$ 0.01
Series A Corporate Units
Shares Issued, Price Per Share					$ 100
Shares To Be Issued Under Stock Purchase Contracts			35,200,000
Series C Preferred Stock
Shares To Be Issued Under Stock Purchase Contracts			35,200,000
Series A Corporate Units
Shares Issued, Price Per Share					100
At The Market Program
Common Stock Aggregate Sale Price			$ 750
ATM Program Equity Remaining Available for Issuance			300
Forward August 21 Member
Forward Contract Indexed to Issuer's Equity, Shares	5,941,598
Forward Contract Indexed to Issuer's Equity, Forward Rate Per Share	$ 25.25
Forward Contract Indexed to Issuer's Equity, Settlement Alternatives, Shares, at Fair Value	$ 143.8		$ 143.8
Forward Contract Indexed to Issuers Equity, Forward Rate Per Share, at Fair Value			$ 24.20
Series A Preferred Stock
Preferred Stock, Shares Outstanding	400,000		400,000
Preferred Stock, Amount of Preferred Dividends in Arrears	$ 1	$ 1
Preferred Stock, Per Share Amounts of Preferred Dividends in Arrears	$ 2.51	$ 2.51
Series B Preferred Stock
Preferred Stock, Shares Outstanding	20,000		20,000
Preferred Stock, Amount of Preferred Dividends in Arrears	$ 1.4	$ 1.4
Preferred Stock, Per Share Amounts of Preferred Dividends in Arrears	$ 72.23	$ 72.23
Series B-1 Preferred Stock
Preferred Stock, Shares Outstanding	20,000		20,000
Series C Preferred Stock
Preferred Stock, Shares Outstanding	862,500		862,500
Preferred Stock, Par or Stated Value Per Share					$ 0.01
Undivided Beneficial Ownership Interest, Percent					10%

Equity Schedule of Stock by Cla

Equity Schedule of Stock by Class - Preferred (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021	Dec. 31, 2021
Class of Stock [Line Items]
Preferred Stock, Shares Outstanding	1,302,500		1,302,500		1,302,500
Shares outstanding	$ 7,224.6		$ 7,224.6		$ 6,947.3
Series A Preferred Stock
Class of Stock [Line Items]
Preferred Stock, Liquidation Preference Per Share	$ 1,000		$ 1,000
Preferred Stock, Shares Outstanding	400,000		400,000
Dividends Declared Per Share	$ 0	$ 0	$ 28.25	$ 28.25
Series B Preferred Stock
Class of Stock [Line Items]
Preferred Stock, Liquidation Preference Per Share	$ 25,000		$ 25,000
Preferred Stock, Shares Outstanding	20,000		20,000
Dividends Declared Per Share	$ 406.25	406.25	$ 1,218.75	1,218.75
Series B-1 Preferred Stock
Class of Stock [Line Items]
Preferred Stock, Shares Outstanding	20,000		20,000
Series C Preferred Stock
Class of Stock [Line Items]
Preferred Stock, Liquidation Preference Per Share	$ 1,000		$ 1,000
Preferred Stock, Shares Outstanding	862,500		862,500
Dividends Declared Per Share	$ 0	$ 0	$ 0	$ 0
Preferred Stock | Series A Preferred Stock
Class of Stock [Line Items]
Shares outstanding	$ 393.9		$ 393.9		393.9
Preferred Stock | Series B Preferred Stock
Class of Stock [Line Items]
Shares outstanding	486.1		486.1		486.1
Preferred Stock | Series C Preferred Stock
Class of Stock [Line Items]
Shares outstanding	$ 666.5		$ 666.5		$ 666.5

Equity Schedule of Series A Equ

Equity Schedule of Series A Equity Units (Details) - USD ($) shares in Thousands, $ in Millions		6 Months Ended
	Apr. 19, 2021	Jun. 30, 2022	Jun. 30, 2021	Dec. 31, 2021
Schedule of Series A Equity Units [Line Items]
Purchase contract liability(1)	$ 168.8	$ 97.3	$ 161.5	$ 129.4
Payments of Stock Issuance Costs	27
Equity Units Stock Purchase Contract Liability Payments		$ 33.4	$ 7.8
Preferred Stock
Schedule of Series A Equity Units [Line Items]
Payments of Stock Issuance Costs	22.5
Purchase Contract Liability
Schedule of Series A Equity Units [Line Items]
Payments of Stock Issuance Costs	$ 4.5
Series A Corporate Units
Schedule of Series A Equity Units [Line Items]
Stock Issued During Period, Shares, New Issues	8,625
Net Proceeds from Sale	$ 835.5
Corporate Units Contract Annual Rate	7.75%

Regulatory Matters (Narrative)

Regulatory Matters (Narrative) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021	Apr. 06, 2022
Public Utilities, General Disclosures [Line Items]
Regulatory Deferral - Joint Venture	$ 9.6	$ 0	$ 6.7	$ 0
Minimum
Public Utilities, General Disclosures [Line Items]
Recommended Rate increase, percentage					4%
Recommended Rate Increase, Amount					$ 35.2
Maximum
Public Utilities, General Disclosures [Line Items]
Recommended Rate increase, percentage					6.30%
Recommended Rate Increase, Amount					$ 57.6
Columbia Of Ohio
Public Utilities, General Disclosures [Line Items]
Public Utilities, Requested Rate Increase (Decrease), Percentage			21.30%
Public Utilities, Requested Rate Increase (Decrease), Amount			$ 221.4
NIPSCO - Electric | Overrecovered Gas and Fuel Costs
Public Utilities, General Disclosures [Line Items]
Regulatory Liabilities	$ 8		$ 8

Risk Management Activities (Nar

Risk Management Activities (Narrative) (Details) mMDth in Millions, $ in Millions		6 Months Ended	12 Months Ended
	Jun. 07, 2022 USD ($)	Jun. 30, 2022 USD ($) mMDth	Dec. 31, 2021 USD ($) mMDth
Derivative [Line Items]
Limit of GCA Volumes		20%
Derivative, Gain (Loss) on Derivative, Net	$ 10.2
Derivative Instruments, Gain (Loss) Recognized in Income, Ineffective Portion and Amount Excluded from Effectiveness Testing, Net		$ 0	$ 0
Minimum
Derivative [Line Items]
Commodity Contract Length		1 year
Maximum
Derivative [Line Items]
Commodity Contract Length		5 years
Senior Notes | NiSource
Derivative [Line Items]
Senior Notes	$ 350
Debt, Weighted Average Interest Rate	5%
Interest Rate Swap
Derivative [Line Items]
Derivative, Notional Amount	$ 250	$ 250
Natural Gas
Derivative [Line Items]
Derivative, Nonmonetary Notional Amount | mMDth		112.3	124.5

Risk Management Activities (Sch

Risk Management Activities (Schedule of Derivative Instruments in Statement of Financial Position, Fair Value) (Details) - USD ($) $ in Millions	Jun. 30, 2022	Dec. 31, 2021
Risk Management Assets Current
Derivatives, Fair Value [Line Items]
Risk management assets	$ 33.7	$ 10.6
Risk Management Assets Noncurrent
Derivatives, Fair Value [Line Items]
Risk management assets	71.9	13.8
Risk Management Liabilities Current
Derivatives, Fair Value [Line Items]
Risk management liabilities	10	136.8
Risk Management Liabilities Noncurrent
Derivatives, Fair Value [Line Items]
Risk management liabilities	1.5	7.4
Interest Rate Risk | Risk Management Assets Current
Derivatives, Fair Value [Line Items]
Risk management assets	0	0
Interest Rate Risk | Risk Management Assets Noncurrent
Derivatives, Fair Value [Line Items]
Risk management assets	0	0
Interest Rate Risk | Risk Management Liabilities Current
Derivatives, Fair Value [Line Items]
Risk management liabilities	9.5	136.4
Interest Rate Risk | Risk Management Liabilities Noncurrent
Derivatives, Fair Value [Line Items]
Risk management liabilities	0	0
Commodity Price Risk Programs | Risk Management Assets Current
Derivatives, Fair Value [Line Items]
Risk management assets	33.7	10.6
Commodity Price Risk Programs | Risk Management Assets Noncurrent
Derivatives, Fair Value [Line Items]
Risk management assets	71.9	13.8
Commodity Price Risk Programs | Risk Management Liabilities Current
Derivatives, Fair Value [Line Items]
Risk management liabilities	0.5	0.4
Commodity Price Risk Programs | Risk Management Liabilities Noncurrent
Derivatives, Fair Value [Line Items]
Risk management liabilities	$ 1.5	$ 7.4

Risk Management Activities (S_2

Risk Management Activities (Schedule of Gains (Losses) on Commodity Price Risk Programs) (Details) - USD ($) $ in Millions	Jun. 30, 2022	Dec. 31, 2021
Deferred Derivative Gain (Loss)
Derivative Instruments, Gain (Loss) [Line Items]
Regulatory Liabilities	$ 127.7	$ 34.2
Deferred Derivative Gain (Loss)
Derivative Instruments, Gain (Loss) [Line Items]
Regulatory Assets	$ 6.8	$ 9.6

Risk Management Activities (S_3

Risk Management Activities (Schedule of Cash Flow Hedges in AOCI) (Details) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2022	Mar. 31, 2022	Dec. 31, 2021	Jun. 30, 2021	Mar. 31, 2021	Dec. 31, 2020
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]
Accumulated Other Comprehensive Income (Loss), Net of Tax	$ (35.8)	$ (85.4)	$ (126.8)	$ (123.6)	$ (75.5)	$ (156.7)
Gains and Losses on Cash Flow Hedges
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]
Accumulated Other Comprehensive Income (Loss), Net of Tax	(19.5)	$ (75.5)	$ (122.5)	$ (113.1)	$ (63.3)	$ (147.9)
Interest Rate Risk
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]
Interest Rate Cash Flow Hedge Gain (Loss) to be Reclassified During Next 12 Months, Net	$ (0.2)
Maximum Length of Time Hedged in Interest Rate Cash Flow Hedge	365 months

Fair Value (Narrative) (Details

Fair Value (Narrative) (Details) - USD ($) $ in Millions	6 Months Ended	12 Months Ended
	Jun. 30, 2022	Dec. 31, 2021
Fair Value Disclosure [Line Items]
Transfers between Fair Value Hierarchies	$ 0	$ 0
Allowance for Credit Loss	(1)	(0.2)
U.S. Treasury debt securities
Fair Value Disclosure [Line Items]
Allowance for Credit Loss	0	0
Available-for-sale Securities, Maturities, Next Twelve Months, Fair Value	3.3
Corporate/Other debt securities
Fair Value Disclosure [Line Items]
Allowance for Credit Loss	(1)	$ (0.2)
Available-for-sale Securities, Maturities, Next Twelve Months, Fair Value	$ 10

Fair Value (Fair Value Of Finan

Fair Value (Fair Value Of Financial Assets And Liabilities Measured On A Recurring Basis) (Details) - USD ($) $ in Millions	Jun. 30, 2022	Dec. 31, 2021
Assets
Available-for-sale, securities	$ 149.8	$ 171.8
Total	255.4	196.2
Liabilities
Total	11.5	144.2
Fair Value, Inputs, Level 1
Assets
Risk management assets	0	0
Available-for-sale, securities	0	0
Total	0	0
Liabilities
Risk management liabilities	0	0
Total	0	0
Significant Other Observable Inputs (Level 2)
Assets
Risk management assets	105.6	24.4
Available-for-sale, securities	149.8	171.8
Total	255.4	196.2
Liabilities
Risk management liabilities	11.5	144.2
Total	11.5	144.2
Significant Unobservable Inputs (Level 3)
Assets
Risk management assets	0	0
Available-for-sale, securities	0	0
Total	0	0
Liabilities
Risk management liabilities	0	0
Total	0	0
Available-for-sale Securities
Assets
Available-for-sale, securities	149.8	171.8
Risk management assets
Assets
Risk management assets	105.6	24.4
Liabilities
Risk management liabilities	$ 11.5	$ 144.2

Fair Value (Available-For-Sale

Fair Value (Available-For-Sale Securities) (Details) - USD ($) $ in Millions	Jun. 30, 2022	Dec. 31, 2021
Fair Value Disclosure [Line Items]
Amortized Cost	$ 160.2	$ 169.3
Gross Unrealized Gains	0.1	3.8
Gross Unrealized Losses	(9.5)	(1.1)
Allowance for Credit Loss	(1)	(0.2)
Fair Value	149.8	171.8
U.S. Treasury debt securities
Fair Value Disclosure [Line Items]
Amortized Cost	51.1	52.8
Gross Unrealized Gains	0	0.1
Gross Unrealized Losses	(2.4)	(0.4)
Allowance for Credit Loss	0	0
Fair Value	48.7	52.5
Debt Securities, Available-for-sale, Unrealized Loss Position	47	36.2
Corporate/Other debt securities
Fair Value Disclosure [Line Items]
Amortized Cost	109.1	116.5
Gross Unrealized Gains	0.1	3.7
Gross Unrealized Losses	(7.1)	(0.7)
Allowance for Credit Loss	(1)	(0.2)
Fair Value	101.1	119.3
Debt Securities, Available-for-sale, Unrealized Loss Position	$ 89.9	$ 35.4

Fair Value (Carrying Amount And

Fair Value (Carrying Amount And Estimated Fair Values Of Financial Instruments) (Details) - USD ($) $ in Millions	Jun. 30, 2022	Dec. 31, 2021
Fair Value Disclosures [Abstract]
Long-term Debt (including current portion), Carrying Amount	$ 9,557.5	$ 9,241.5
Long-term debt (including current portion), Estimated Fair Value	$ 8,770	$ 10,415.7

Goodwill (Narrative) (Details)

Goodwill (Narrative) (Details) - USD ($) $ in Millions	Jun. 30, 2022	Dec. 31, 2021
Goodwill [Line Items]
Goodwill	$ 1,485.9	$ 1,485.9
Gas Distribution Operations
Goodwill [Line Items]
Goodwill	$ 1,485.9	$ 1,485.9

Income Taxes (Narrative) (Detai

Income Taxes (Narrative) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Income Tax Disclosure [Abstract]
Effective income tax rates	17.70%	18.80%	18.20%	17.70%
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate			21%
Increase (Decrease) in Effective Tax Rate	(1.10%)		0.50%
Changes to Liability for Uncertain Tax Positions			$ 0

Pension And Other Postretirem_3

Pension And Other Postretirement Benefits (Narrative) (Details) - USD ($) $ in Millions	6 Months Ended	12 Months Ended
	Jun. 30, 2022	Dec. 31, 2021
Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Employer contributions	$ 1.3
Defined Benefit Plan, Pension Asset, (Increase)Decrease For Remeasurement Due To Settlement	39.8
Change in Regulatory Assets Due to Interim Measurement	30
Change in Accumulated Other Comprehensive Income Due to Interim Measurement	3.5
Change to Defined Benefit Plan Net Periodic Costs Due to Interim Measurement	$ 5.7
Discount rate	4.13%	2.60%
Discount rate- service cost	4.30%	2.85%
Discount rate - interest cost	3.64%	1.90%
Expected return on assets	5.70%	4.80%
Other Postretirement Benefit Plan
Defined Benefit Plan Disclosure [Line Items]
Employer contributions	$ 10.5

Pension And Other Postretirem_4

Pension And Other Postretirement Benefits (Components Of The Plans' Net Periodic Benefits Cost) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Service Cost	$ 7	$ 7.5	$ 14.1	$ 15.1
Interest cost	9.8	7.9	19.2	15.6
Expected return on assets	(22.8)	(25.3)	(45.7)	(51.1)
Amortization of prior service credit	0	0	0	0
Recognized actuarial loss	4.8	5.5	9.3	10.8
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Gain (Loss) Due to Settlement	6.3	3.3	6.3	6.6
Total Net Periodic Benefits Cost	5.1	(1.1)	3.2	(3)
Other Postretirement Benefit Plan
Defined Benefit Plan Disclosure [Line Items]
Service Cost	1.6	1.5	3.2	3
Interest cost	3	2.5	6	5
Expected return on assets	(4)	(3.8)	(8)	(7.6)
Amortization of prior service credit	(0.6)	(0.6)	(1.2)	(1.2)
Recognized actuarial loss	0.7	1.2	1.4	2.4
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Gain (Loss) Due to Settlement	0	0	0	0
Total Net Periodic Benefits Cost	$ 0.7	$ 0.8	$ 1.4	$ 1.6

Variable Interest Entities (Nar

Variable Interest Entities (Narrative) (Details) $ in Millions	6 Months Ended
	Jun. 30, 2022 USD ($) Rate MW
Variable Interest Entity [Line Items]
Wind Power Purchase Agreement, Purchase Percentage | Rate	100%
Rosewater
Variable Interest Entity [Line Items]
Nameplate Capacity | MW	102
Total Cash Contributions | $	$ 170.1
Indiana Crossroads Wind
Variable Interest Entity [Line Items]
Nameplate Capacity | MW	302
Total Cash Contributions | $	$ 511.8

Variable Interest Entities (Sch

Variable Interest Entities (Schedule of Noncontrolling Interest) (Details) - USD ($) $ in Millions	Jun. 30, 2022	Dec. 31, 2021
Redeemable Noncontrolling Interest [Line Items]
Noncontrolling interest in consolidated subsidiaries	$ 315.8	$ 325.6
Rosewater
Redeemable Noncontrolling Interest [Line Items]
Noncontrolling interest in consolidated subsidiaries	83.9	88.2
Indiana Crossroads Wind
Redeemable Noncontrolling Interest [Line Items]
Noncontrolling interest in consolidated subsidiaries	$ 231.9	$ 237.4

Variable Interest Entities (S_2

Variable Interest Entities (Schedule of Net Income Attributable to Noncontrolling Interest) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Income Attributable to Noncontrolling Interest [Line Items]
Net loss attributable to noncontrolling interest	$ (11.2)	$ (3.4)	$ (6.7)	$ (2.4)
Rosewater
Income Attributable to Noncontrolling Interest [Line Items]
Net loss attributable to noncontrolling interest	(4)	$ (3.4)	(2.9)	(2.4)
Indiana Crossroads Wind
Income Attributable to Noncontrolling Interest [Line Items]
Net loss attributable to noncontrolling interest	$ (7.2)		$ (3.8)	$ 0

Variable Interest Entities (S_3

Variable Interest Entities (Schedule of VIE Assets and Liabilities) (Details) - USD ($) $ in Millions	Jun. 30, 2022		Dec. 31, 2021
Variable Interest Entity [Line Items]
Current assets	$ 1,911.7	[1]	$ 1,920.8
Total Assets	24,813.8		24,156.9
Current liabilities	3,015	[2]	2,746.2
Asset retirement obligations	464.1		469.7
Other noncurrent liabilities	329.7		690.2
Rosewater
Variable Interest Entity [Line Items]
Net Property, Plant and Equipment	167.3		170.1
Current assets	7.8		6.2
Total Assets	175.1		176.3
Current liabilities	3.6		2.5
Asset retirement obligations	5.8		5.7
Total Liabilities	9.4		8.2
Indiana Crossroads Wind
Variable Interest Entity [Line Items]
Net Property, Plant and Equipment	517.3		525.8
Current assets	12.6		8.1
Total Assets	529.9		533.9
Current liabilities	3.9		7.5
Asset retirement obligations	15		14.8
Total Liabilities	$ 18.9		$ 22.3
[1]Includes $684.6 million and $695.9 million at June 30, 2022 and December 31, 2021, respectively, of net property, plant and equipment assets and $20.4 million and $14.3 million at June 30, 2022 and December 31, 2021, respectively, of current assets of consolidated VIEs that may be used only to settle obligations of the consolidated VIEs. Refer to Note 12, "Variable Interest Entities" for additional information.[2]Includes $7.5 million and $10.0 million at June 30, 2022 and December 31, 2021, respectively, of current liabilities and $20.8 million and $20.5 million at June 30, 2022 and December 31, 2021, respectively, of other liabilities of consolidated VIEs that creditors do not have recourse to our general credit. Refer to Note 12, "Variable Interest Entities," for additional information.

Long-Term Debt (Narrative) (Det

Long-Term Debt (Narrative) (Details) - NiSource - USD ($) $ in Millions	Jun. 07, 2022	Jun. 30, 2022	Apr. 01, 2022
Medium-term Notes
Debt Instrument [Line Items]
Medium-term Notes, Current			$ 20
Debt, Weighted Average Interest Rate			7.99%
Medium-term Notes, Noncurrent		$ 29
Senior Notes
Debt Instrument [Line Items]
Debt, Weighted Average Interest Rate	5%
Senior Notes	$ 350
Proceeds from Debt, Net of Issuance Costs	$ 344.6

Short-Term Borrowings (Narrativ

Short-Term Borrowings (Narrative) (Details) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2022 USD ($)	Jun. 30, 2021 USD ($)	Jun. 30, 2022 USD ($)	Jun. 30, 2021 USD ($)	Dec. 31, 2021 USD ($)
Short-term Debt [Line Items]
Short-term debt due to asset securitization	$ 285		$ 285
Accounts Receivable Program
Short-term Debt [Line Items]
Number of Agreements			3
Seasonal Limit	285		$ 285
Short-term debt due to asset securitization	0		0		$ 0
Cash From Financing Activities Related To The Change In Short-Term Borrowings Due To The Securitization Transactions			285	$ 0
Securitization Transaction Fees	0.7	$ 0.4	1	$ 0.8
Revolving Credit Facility
Short-term Debt [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity	1,850		1,850
Long-term Line of Credit	0		0		0
Commercial Paper
Short-term Debt [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity	1,500		1,500
Commercial paper outstanding	$ 270		$ 270		$ 560
Short-term Debt, Weighted Average Interest Rate, at Point in Time	2%		2%		0.24%

Other Commitments And Conting_2

Other Commitments And Contingencies (Narrative) (Details) $ in Millions	Aug. 02, 2022 USD ($)	Jun. 30, 2022 USD ($) Rate	Dec. 31, 2021 USD ($)
Other Commitments And Contingencies [Line Items]
Guaranty Liabilities		$ 485.2	$ 288.9
Recorded reserves to cover environmental remediation at various sites		$ 98.2	91.1
Wind Power Purchase Agreement, Purchase Percentage | Rate		100%
Subsequent Event
Other Commitments And Contingencies [Line Items]
Guaranty Liabilities	$ 796.5
MGP Sites
Other Commitments And Contingencies [Line Items]
Number of waste disposal sites identified by program		53
Liability for Estimated Remediation Costs		$ 91.9	85.1
Reasonably possible remediation costs variance from reserve		17
Standby Letters of Credit
Other Commitments And Contingencies [Line Items]
Long-term Line of Credit		$ 14.7	$ 18.9

Accumulated Other Comprehensi_3

Accumulated Other Comprehensive Loss (Components Of Accumulated Other Comprehensive Loss) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	$ (85.4)	$ (75.5)	$ (126.8)	$ (156.7)
Other Comprehensive Income (Loss) before reclassifications	48.7	(48.9)	89.8	32.1
Amounts reclassified from accumulated other comprehensive income (loss)	0.9	0.8	1.2	1
Net current-period other comprehensive income (loss)	49.6	(48.1)	91	33.1
Ending Balance	(35.8)	(123.6)	(35.8)	(123.6)
Interest Rate Risk
Accumulated Other Comprehensive Income (Loss) [Line Items]
Net current-period other comprehensive income (loss)			103
Gains and Losses on Securities
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	(3.6)	3.5	2.1	6
Other Comprehensive Income (Loss) before reclassifications	(3.9)	0.8	(9.8)	(1.4)
Amounts reclassified from accumulated other comprehensive income (loss)	0	0.1	0.2	(0.2)
Net current-period other comprehensive income (loss)	(3.9)	0.9	(9.6)	(1.6)
Ending Balance	(7.5)	4.4	(7.5)	4.4
Gains and Losses on Cash Flow Hedges
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	(75.5)	(63.3)	(122.5)	(147.9)
Other Comprehensive Income (Loss) before reclassifications	55.9	(49.8)	102.9	34.8
Amounts reclassified from accumulated other comprehensive income (loss)	0.1	0	0.1	0
Net current-period other comprehensive income (loss)	56	(49.8)		34.8
Ending Balance	(19.5)	(113.1)	(19.5)	(113.1)
Pension and OPEB Items
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	(6.3)	(15.7)	(6.4)	(14.8)
Other Comprehensive Income (Loss) before reclassifications	(3.3)	0.1	(3.3)	(1.3)
Amounts reclassified from accumulated other comprehensive income (loss)	0.8	0.7	0.9	1.2
Net current-period other comprehensive income (loss)	(2.5)	0.8	(2.4)	(0.1)
Ending Balance	$ (8.8)	$ (14.9)	$ (8.8)	$ (14.9)

Other, Net (Details)

Other, Net (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Other, Net [Abstract]
Interest income	$ 0.6	$ 0.7	$ 1.5	$ 1.6
AFUDC equity	4	3.4	7	4.9
Pension and other postretirement non-service benefit	4.7	8.6	12.3	17.1
Miscellaneous	(0.3)	(0.3)	(0.9)	(0.7)
Other, net	$ 9	$ 12.4	$ 19.9	$ 22.9

Business Segment Information (N

Business Segment Information (Narrative) (Details)	6 Months Ended
	Jun. 30, 2022
Segment Reporting [Abstract]
Primary business segments	2

Business Segment Information (S

Business Segment Information (Schedule Of Operating Income Derived From Revenues And Expenses By Segment) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Segment Reporting Information [Line Items]
Revenues	$ 1,183.2	$ 986	$ 3,056.5	$ 2,531.6
Consolidated Operating Income (Loss)	143.3	142.2	743.6	575.4
Eliminations
Segment Reporting Information [Line Items]
Revenues	(124.1)	(120.6)	(240.9)	(227.8)
Gas Distribution Operations
Segment Reporting Information [Line Items]
Revenues	744.3	577.3	2,184.1	1,716.2
Consolidated Operating Income (Loss)	80.6	61.2	591.4	408.1
Gas Distribution Operations | Unaffiliated
Segment Reporting Information [Line Items]
Revenues	741.1	574.3	2,177.8	1,710.1
Gas Distribution Operations | Intersegment
Segment Reporting Information [Line Items]
Revenues	3.2	3	6.3	6.1
Electric Operations
Segment Reporting Information [Line Items]
Revenues	437.3	403.7	867.6	806.4
Consolidated Operating Income (Loss)	72.6	79.6	171.8	167.5
Electric Operations | Unaffiliated
Segment Reporting Information [Line Items]
Revenues	437.1	403.5	867.2	806
Electric Operations | Intersegment
Segment Reporting Information [Line Items]
Revenues	0.2	0.2	0.4	0.4
Corporate and Other
Segment Reporting Information [Line Items]
Revenues	125.7	125.6	245.7	236.8
Consolidated Operating Income (Loss)	(9.9)	1.4	(19.6)	(0.2)
Corporate and Other | Unaffiliated
Segment Reporting Information [Line Items]
Revenues	5	8.2	11.5	15.5
Corporate and Other | Intersegment
Segment Reporting Information [Line Items]
Revenues	$ 120.7	$ 117.4	$ 234.2	$ 221.3