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Pay vs Performance Disclosure

12 Months Ended

Dec. 31, 2024

USD ($)

Dec. 31, 2023

USD ($)

Dec. 31, 2022

USD ($)

Dec. 31, 2021

USD ($)

Dec. 31, 2020

USD ($)

Dec. 31, 2019

USD ($)

Pay vs Performance Disclosure

Pay vs Performance Disclosure, Table

The Leadership Development and Compensation Committee did not consider the pay versus performance disclosure below in making its pay decisions for any of the years shown.


													Value of initial Fixed $100 Investment Based on:									Company-Selected Performance Measure
	Summary Compensation Table Total for Linden R. Evans (1)			Compensation Actually Paid to Linden R. Evans (1) (2) (3)			Average Summary Compensation Table Total for Non-PEO NEOs (1)			Average Compensation Actually Paid to Non-PEO NEOs (1) (2) (3)			Total Shareholder Return			Peer Group Total Shareholder Return (4)			Net income (GAAP), in millions			EPS from ongoing operations, as adjusted (non-GAAP)			(5)
2024	$	5,787,141		$	5,232,253		$	1,167,991		$	935,342		$	90.09		$	127.32		$	283.7		$	3.91
2023	$	5,639,002		$	1,951,347		$	1,186,100		$	631,015		$	79.38		$	106.90		$	276.0		$	3.93
2022	$	4,486,548		$	4,506,289		$	1,208,492		$	1,224,584		$	99.15		$	117.09		$	270.8		$	3.97
2021	$	4,440,908		$	5,151,457		$	1,318,764		$	1,453,664		$	96.19		$	115.76		$	251.3		$	3.74
2020	$	4,221,114		$	3,055,790		$	1,565,573		$	1,003,991		$	80.92		$	98.84		$	242.8		$	3.73

Company Selected Measure Name

EPS from ongoing operations, as adjusted (non-GAAP)

Named Executive Officers, Footnote

(1)

Linden R. Evans was our PEO for each year presented. The individuals comprising the Non-PEO NEOs for each year presented are listed below:


2020	2021	2022	2023	2024
Richard W. Kinzley	Richard W. Kinzley	Richard W. Kinzley	Kimberly F. Nooney	Kimberly F. Nooney
Brian G. Iverson	Brian G. Iverson	Brian G. Iverson	Brian G. Iverson	Marne M. Jones
Stuart A. Wevik	Stuart A. Wevik	Erik D. Keller	Marne M. Jones	Erik D. Keller
Scott A. Buchholz	Erik D. Keller	Jennifer C. Landis	Erik D. Keller	Sarah A. Wiltse
			Richard W. Kinzley	Brian G. Iverson

Peer Group Issuers, Footnote

(4)

The Peer Group TSR set forth in this table utilizes the Edison Electric Institute Index (“EEI Index”), which we also utilize in the stock performance graph required by Item 201(e) of Regulation S-K included in our Annual Report for the year ended December 31, 2024. The comparison assumes $100 was invested for the period starting December 31, 2019, through the end of the listed year in the Company and in the EEI Index, respectively. All dollar values assume reinvestment of the pre-tax value of dividends paid by companies, where applicable, included in the EEI Index. Upon review, it was determined that the amounts previously reported for the Peer Group TSR for 2021 - 2023 were inaccurate and those amounts have been adjusted in this year's table. Historical stock performance is not necessarily indicative of future stock performance.

PEO Total Compensation Amount

$ 5,787,141

$ 5,639,002

$ 4,486,548

$ 4,440,908

$ 4,221,114

PEO Actually Paid Compensation Amount

5,232,253

1,951,347

4,506,289

5,151,457

3,055,790

Non-PEO NEO Average Total Compensation Amount

1,167,991

1,186,100

1,208,492

1,318,764

1,565,573

Non-PEO NEO Average Compensation Actually Paid Amount

$ 935,342

631,015

1,224,584

1,453,664

1,003,991

Adjustment to Non-PEO NEO Compensation Footnote

(5)

We determined EPS from ongoing operations, as adjusted (non-GAAP) to be the most important financial performance measure used to link Company performance to Compensation Actually Paid to our PEO and Non-PEO NEOs in 2024. More information on EPS from ongoing operations, as adjusted can be found in the Short-Term Incentive section of Compensation Discussion and Analysis.

Equity Valuation Assumption Difference, Footnote

The amounts in the Inclusion of Equity Values in the tables above are derived from the amounts set forth in the following tables:


Year		Year-End Fair Value of Equity Awards Granted During Year That Remained Unvested as of Last Day of Year for Linden R. Evans				Change in Fair Value from Last Day of Prior Year to Last Day of Year of Unvested Equity Awards for Linden R. Evans				Vesting-Date Fair Value of Equity Awards Granted During Year that Vested During Year for Linden R. Evans				Change in Fair Value from Last Day of Prior Year to Vesting Date of Unvested Equity Awards that Vested During Year for Linden R. Evans				Fair Value at Last Day of Prior Year of Equity Awards Forfeited During Year for Linden R. Evans				Value of Dividends or Other Earnings Paid on Stock or Option Awards Not Otherwise Included for Linden R. Evans				Total - Inclusion of Equity Values for Linden R. Evans
2024		$	3,382,932			$	(413,751	)		$	—			$	(285,517	)		$	(238,089	)		$	—			$	2,445,575


Year		Average Year-End Fair Value of Equity Awards Granted During Year That Remained Unvested as of Last Day of Year for Non-PEO NEOs				Average Change in Fair Value from Last Day of Prior Year to Last Day of Year of Unvested Equity Awards for Non-PEO NEOs				Average Vesting-Date Fair Value of Equity Awards Granted During Year that Vested During Year for Non-PEO NEOs				Average Change in Fair Value from Last Day of Prior Year to Vesting Date of Unvested Equity Awards that Vested During Year for Non-PEO NEOs				Average Fair Value at Last Day of Prior Year of Equity Awards Forfeited During Year for Non-PEO NEOs				Average Value of Dividends or Other Earnings Paid on Stock or Option Awards Not Otherwise Included for Non-PEO NEOs				Total - Average Inclusion of Equity Values for Non-PEO NEOs
2024		$	393,890			$	(49,761	)		$	—			$	(33,066	)		$	(83,698	)		$	—			$	227,365

Compensation Actually Paid vs. Total Shareholder Return

(3)

Compensation Actually Paid reflects the exclusions and inclusions of certain amounts for the PEO and the Non-PEO NEOs as set forth below. Equity values are calculated in accordance with FASB ASC Topic 718. Amounts in the Exclusion of Stock Awards column are the totals from the Stock Awards column set forth in the Summary Compensation Table. Amounts in the Exclusion of Change in Pension Value column reflect the amounts attributable to the Change in Pension Value reported in the Summary Compensation Table. Amounts in the Inclusion of Pension Service Cost are based on the service cost for services rendered during the listed year.


Year		Summary Compensation Table Total for Linden R. Evans				Exclusion of Change in Pension Value for Linden R. Evans				Exclusion of Stock Awards for Linden R. Evans				Inclusion of Pension Service Cost for Linden R. Evans				Inclusion of Equity Values for Linden R. Evans				Compensation Actually Paid to Linden R. Evans
2024		$	5,787,141			$	—			$	(3,000,463	)		$	—			$	2,445,575			$	5,232,253


Year		Average Summary Compensation Table Total for Non-PEO NEOs				Average Exclusion of Change in Pension Value for Non-PEO NEOs				Average Exclusion of Stock Awards and Option Awards for Non-PEO NEOs				Average Inclusion of Pension Service Cost for Non-PEO NEOs				Average Inclusion of Equity Values for Non-PEO NEOs				Average Compensation Actually Paid to Non-PEO NEOs
2024		$	1,167,991			$	—			$	(460,014	)		$	—			$	227,365			$	935,342

Compensation Actually Paid vs. Net Income

Compensation Actually Paid vs. Company Selected Measure

Total Shareholder Return Vs Peer Group

As presented, the first chart below compares the Company's TSR and peer group TSR, assumes an initial investment of $100 on December 31, 2019, assumes all dividends were reinvested and depicts performance at the end of each applicable year.

Tabular List, Table

Financial Performance Measures

The following table presents the financial performance measures that the Company considers to have been the most important in linking Compensation Actually Paid to our PEO and other NEOs for 2024 to Company performance. The measures in this table are not ranked.

      Most Important Performance Measures

     

      EPS from ongoing operations, as adjusted (non-GAAP)

     

      Net income

     

      Total Shareholder Return

     

Total Shareholder Return Amount

$ 90.09

79.38

99.15

96.19

80.92

Peer Group Total Shareholder Return Amount

127.32

106.9

117.09

115.76

98.84

Net Income (Loss)

$ 283,700,000

$ 276,000,000

$ 270,800,000

$ 251,300,000

$ 242,800,000

Company Selected Measure Amount

3.91

3.93

3.97

3.74

3.73

Adjustment to Compensation, Amount

$ 100

$ 100

Linden R

Linden R

Linden R

Linden R

Linden R

Additional 402(v) Disclosure

(2)

The amounts shown for Compensation Actually Paid have been calculated in accordance with Item 402(v) of Regulation S-K and do not reflect compensation actually earned, realized, or received by the Company's NEOs. These amounts reflect the Summary Compensation Table Total with certain adjustments as described in footnote (3) below.

Pay vs Performance Disclosure

EPS from ongoing operations, as adjusted (non-GAAP)

Pay vs Performance Disclosure

Net income

Pay vs Performance Disclosure

Total Shareholder Return

Kimberly F. Nooney [Member]

Pay vs Performance Disclosure

Kimberly F. Nooney

Kimberly F. Nooney

Richard W. Kinzley [Member]

Pay vs Performance Disclosure

Richard W. Kinzley

Richard W. Kinzley

Richard W. Kinzley

Richard W. Kinzley

Brian G. Iverson [Member]

Pay vs Performance Disclosure

Brian G. Iverson

Brian G. Iverson

Brian G. Iverson

Brian G. Iverson

Brian G. Iverson

Marne M. Jones [Member]

Pay vs Performance Disclosure

Marne M. Jones

Marne M. Jones

Stuart A. Wevik [Member]

Pay vs Performance Disclosure

Stuart A. Wevik

Stuart A. Wevik

Scott A. Buchholz [Member]

Pay vs Performance Disclosure

Scott A. Buchholz

Erik D. Keller [Member]

Pay vs Performance Disclosure

Erik D. Keller

Erik D. Keller

Erik D. Keller

Erik D. Keller

Jennifer C. Landis [Member]

Pay vs Performance Disclosure

Jennifer C. Landis

Sarah A. Wiltse [Member]

Pay vs Performance Disclosure

Sarah A. Wiltse

Pay vs Performance Disclosure

Peo Exclusion of Change in Pension Value

$ (0)

Peo Exclusion of Stock Awards

(3,000,463)

Peo Inclusion of Pension Service Cost

0

Peo Inclusion of Equity Values

2,445,575

Peo Year-End Fair Value of Equity Awards Granted During Year That Remained Unvested

3,382,932

Peo Change in Fair Value from Last Day of Prior Year to Last Day of Year of Unvested Equity Awards

(413,751)

Peo Vesting-Date Fair Value of Equity Awards Granted During Year that Vested During Year

0

Peo Change in Fair Value from Last Day of Prior Year to Vesting Date of Unvested Equity Awards that Vested During Year

(285,517)

Peo Fair Value at Last Day of Prior Year of Equity Awards Forfeited During Year

(238,089)

Peo Value of Dividends or Other Earnings Paid on Stock or Option Awards Not Otherwise Included

0

Peo Total - Inclusion of Equity Values

2,445,575

Pay vs Performance Disclosure

Non Peo Neo Average Exclusion of Change in Pension Value

(0)

Non Peo Neo Average Exclusion of Stock Awards and Option Awards

(460,014)

Non Peo Neo Average Inclusion of Pension Service Cost

0

Non Peo Neo Average Inclusion of Equity Values

227,365

Non Peo Neo Average Year-End Fair Value of Equity Awards Granted During Year That Remained Unvested

393,890

Non Peo Neo Average Change in Fair Value from Last Day of Prior Year to Last Day of Year of Unvested Equity Awards

(49,761)

Non Peo Neo Average Vesting-Date Fair Value of Equity Awards Granted During Year that Vested During Year

0

Non Peo Neo Average Change in Fair Value from Last Day of Prior Year to Vesting Date of Unvested Equity Awards that Vested During Year

(33,066)

Non Peo Neo Average Fair Value at Last Day of Prior Year of Equity Awards Forfeited During Year

(83,698)

Non Peo Neo Average Value of Dividends or Other Earnings Paid on Stock or Option Awards Not Otherwise Included

0

Non Peo Neo Total - Average Inclusion of Equity Values

$ 227,365