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Employee Benefit Plans and Equity Compensation Plan (Tables)
12 Months Ended
Dec. 31, 2022
Compensation And Retirement Disclosure [Abstract]  
Schedule of Changes in Projected Benefit Obligations

The measurement date used to determine pension and other postretirement benefit obligations is December 31. Data related to the changes in the projected benefit obligation for pension benefits and the accumulated benefit obligation for other postretirement benefits are presented below.

 

 

 

Pension Benefits

 

 

Other Postretirement Benefits

 

(millions)

 

2022

 

 

2021

 

 

2022

 

 

2021

 

Beginning balance

 

$

702

 

 

$

742

 

 

$

171

 

 

$

184

 

Service cost

 

 

8

 

 

 

9

 

 

 

1

 

 

 

1

 

Interest cost

 

 

21

 

 

 

20

 

 

 

6

 

 

 

6

 

Actuarial (gain) loss

 

 

(105

)

 

 

(28

)

 

 

(44

)

 

 

(8

)

Benefits paid

 

 

(46

)

 

 

(41

)

 

 

(13

)

 

 

(12

)

Ending balance

 

$

580

 

 

$

702

 

 

$

121

 

 

$

171

 

Schedule of Assumptions Used to Determine Benefit Obligations

Significant assumptions used to determine the above benefit obligations are as follows:

 

 

 

Pension Benefits

 

Other Postretirement Benefits

 

 

2022

 

2021

 

2022

 

2021

Annual discount rate used to determine benefit obligation

 

5.69%

 

3.06%

 

5.70%

 

3.11%

Assumed annual rate of future salary increases for projected
   benefit obligation

 

3.93%

 

3.71%

 

N/A

 

N/A

Crediting interest rate for cash balance plans

 

4.44%

 

1.81%

 

N/A

 

N/A

Schedule of Net Funded Status

 

 

Pension Benefits

 

 

Other Postretirement Benefits

 

At December 31,

 

2022

 

 

2021

 

 

2022

 

 

2021

 

(millions)

 

 

 

 

 

 

 

 

 

 

 

 

Fair value of plan assets

 

$

561

 

 

$

768

 

 

$

 

 

$

 

Benefit obligation

 

 

580

 

 

 

702

 

 

 

121

 

 

 

171

 

Funded status

 

$

(19

)

 

$

66

 

 

$

(121

)

 

$

(171

)

Schedule of Amounts Recognized in Balance Sheet

Amounts recognized on the consolidated balance sheets were as follows:

 

 

 

Pension Benefits

 

 

Other Postretirement Benefits

 

At December 31,

 

2022

 

 

2021

 

 

2022

 

 

2021

 

(millions)

 

 

 

 

 

 

 

 

 

 

 

 

Noncurrent assets

 

$

 

 

$

66

 

 

$

 

 

$

 

Current liability

 

 

 

 

 

 

 

 

(11

)

 

 

(10

)

Noncurrent liability

 

 

(19

)

 

 

 

 

 

(110

)

 

 

(161

)

Schedule of Amounts Recognized in AOCI

Amounts recognized in AOCI were as follows:

 

 

 

Pension Benefits

 

 

Other Postretirement Benefits

 

At December 31,

 

2022

 

 

2021

 

 

2022

 

 

2021

 

(millions)

 

 

 

 

 

 

 

 

 

 

 

 

Net actuarial (gain) loss

 

$

3

 

 

$

1

 

 

$

(1

)

 

$

 

Schedule of Amounts Recognized in Regulatory Assets

Amounts recognized in regulatory assets were as follows:

 

 

 

Pension Benefits

 

 

Other Postretirement Benefits

 

At December 31,

 

2022

 

 

2021

 

 

2022

 

 

2021

 

(millions)

 

 

 

 

 

 

 

 

 

 

 

 

Net actuarial (gain) loss

 

$

164

 

 

$

70

 

 

$

(46

)

 

$

(5

)

Schedule of Changes in Fair Value of Plan Assets

Changes in Fair Value of Plan Assets

 

 

 

Pension Benefits

 

(millions)

 

2022

 

 

2021

 

Beginning balance

 

$

768

 

 

$

747

 

Actual return (loss) on plan assets

 

 

(161

)

 

 

62

 

Benefits paid

 

 

(46

)

 

 

(41

)

Ending balance

 

$

561

 

 

$

768

 

Schedule of Fair Value Measurements By Category At December 31, 2022 and 2021, fair value measurements, and the level within the fair value hierarchy in which the measurements fall, were as follows:

 

At December 31,

 

2022

 

 

2021

 

(millions)

 

Level 1

 

 

Level 2

 

 

Level 3

 

 

Total

 

 

Level 1

 

 

Level 2

 

 

Level 3

 

 

Total

 

Cash and cash equivalents

 

$

 

 

$

2

 

 

$

 

 

$

2

 

 

$

 

 

$

1

 

 

$

 

 

$

1

 

Corporate debt instruments

 

 

 

 

 

137

 

 

 

 

 

 

137

 

 

 

 

 

 

332

 

 

 

 

 

 

332

 

Government and other debt instruments

 

 

 

 

 

18

 

 

 

 

 

 

18

 

 

 

 

 

 

67

 

 

 

 

 

 

67

 

Total recorded at fair value

 

$

 

 

$

157

 

 

$

 

 

$

157

 

 

$

 

 

$

400

 

 

$

 

 

$

400

 

Assets recorded at NAV(1)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Common/collective trust funds

 

 

 

 

 

 

 

 

 

 

 

417

 

 

 

 

 

 

 

 

 

 

 

 

387

 

Total recorded at NAV

 

 

 

 

 

 

 

 

 

 

$

417

 

 

 

 

 

 

 

 

 

 

 

$

387

 

Total investments(2)

 

 

 

 

 

 

 

 

 

 

$

574

 

 

 

 

 

 

 

 

 

 

 

$

787

 

(1)
These investments that are measured at fair value using the NAV per share (or its equivalent) as a practical expedient are not required to be categorized in the fair value hierarchy.
(2)
Excludes net assets related to pending sales of securities of $1 million, net accrued income of $1 million, and includes net assets related to pending purchases of securities of $15 million at December 31, 2022. Excludes net assets related to pending sales of securities of $4 million, net accrued income of $2 million, and includes net assets related to pending purchases of securities of $25 million at December 31, 2021.
Schedule of Expected Benefit Payments

Expected Benefit Payments

 

(millions)

 

Pension
Benefits

 

 

Other
Postretirement
Benefits

 

2023

 

$

45

 

 

$

11

 

2024

 

 

47

 

 

 

11

 

2025

 

 

47

 

 

 

11

 

2026

 

 

46

 

 

 

11

 

2027

 

 

45

 

 

 

11

 

2028 - 2032

 

 

243

 

 

 

57

 

Components of Net Periodic Benefit Cost

Components of Net Periodic Benefit (Credit) Cost

 

 

 

Pension Benefits

 

 

Other Postretirement Benefits

 

Year Ended December 31,

 

2022

 

 

2021

 

 

2020

 

 

2022

 

 

2021

 

 

2020

 

(millions)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Service cost

 

$

8

 

 

$

9

 

 

$

12

 

 

$

1

 

 

$

1

 

 

$

3

 

Interest cost

 

 

21

 

 

 

20

 

 

 

24

 

 

 

6

 

 

 

6

 

 

 

8

 

Expected return on assets

 

 

(49

)

 

 

(48

)

 

 

(45

)

 

 

 

 

 

 

 

 

 

Amortization of actuarial losses

 

 

1

 

 

 

6

 

 

 

6

 

 

 

 

 

 

 

 

 

 

Settlement loss

 

 

 

 

 

 

 

 

7

 

 

 

 

 

 

 

 

 

 

Net periodic benefit (credit) cost

 

$

(19

)

 

$

(13

)

 

$

4

 

 

$

7

 

 

$

7

 

 

$

11

 

Schedule of Defined Benefit Plan Amounts Recognized in Other Comprehensive Income (Loss)

Other changes in plan assets and benefit obligations recognized in other comprehensive income (net of tax) were as follows:

 

 

 

Pension Benefits

 

 

Other Postretirement Benefits

 

Year Ended December 31,

 

2022

 

 

2021

 

 

2020

 

 

2022

 

 

2021

 

 

2020

 

(millions)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Current year actuarial (gain) loss

 

$

2

 

 

$

(3

)

 

$

2

 

 

$

(1

)

 

$

 

 

$

(2

)

Total recognized in other comprehensive income

 

$

2

 

 

$

(3

)

 

$

2

 

 

$

(1

)

 

$

 

 

$

(2

)

Schedule of Defined Benefit Plan Amounts Recognized in Regulatory Assets

Other changes in plan assets and benefit obligations recognized in regulatory assets were as follows:

 

 

 

Pension Benefits

 

 

Other Postretirement Benefits

 

Year Ended December 31,

 

2022

 

 

2021

 

 

2020

 

 

2022

 

 

2021

 

 

2020

 

(millions)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Current year actuarial (gain) loss

 

$

95

 

 

$

(39

)

 

$

1

 

 

$

(41

)

 

$

(6

)

 

$

(27

)

Amortization of actuarial losses

 

 

(1

)

 

 

(5

)

 

 

(6

)

 

 

 

 

 

 

 

 

(1

)

Settlement loss

 

 

 

 

 

 

 

 

(6

)

 

 

 

 

 

 

 

 

 

Total recognized in regulatory assets

 

$

94

 

 

$

(44

)

 

$

(11

)

 

$

(41

)

 

$

(6

)

 

$

(28

)

Schedule of Assumptions Used in Determining Net Periodic Benefit Cost

Significant assumptions used in determining net periodic benefit cost:

 

 

 

Pension Benefits

 

Other Postretirement Benefits

Year Ended December 31,

 

2022

 

2021

 

2020

 

2022

 

2021

 

2020

Discount rate

 

3.06%

 

2.73%

 

3.47%

 

3.11%

 

2.80%

 

2.80%

Expected return on plan assets

 

7.00%

 

7.00%

 

7.00%

 

n/a

 

n/a

 

n/a

Rate of compensation increase

 

3.71%

 

4.52%

 

3.00%

 

n/a

 

n/a

 

n/a

Crediting interest rate for cash balance plans

 

1.81%

 

1.93%

 

2.67%

 

n/a

 

n/a

 

n/a

Health care cost trend rate

 

 

 

 

 

 

 

6.25%

 

6.25%

 

6.25%

Ultimate health care cost trend rate

 

 

 

 

 

 

 

5.00%

 

5.00%

 

5.00%

Year achieved

 

 

 

 

 

 

 

2026-2027

 

2025-2026

 

2025-2026