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v3.23.1

Employee Benefit Plans (Notes) | 3 Months Ended
--- | ---
Mar. 31, 2023
Defined Benefit Plans and Other Postretirement Benefit Plans Disclosures [Abstract] |
Pension and Other Postretirement Benefits Disclosure [Text Block] | 8. EMPLOYEE BENEFIT PLANS The components of net periodic benefit cost (credit) are as follows:
|  |  |  |  |  | Pension Benefits
|  |  |  | Three Months Ended
|  |  |  | March 31,
|  |  |  |  |  | 2023 |  | 2022
|  |  |  |  |  | (in millions)
Service cost |  |  |  |  |  | $ | 0.3 |  |  | $ | 0.5 |
Interest cost |  |  |  |  |  | 6.0 |  |  | 4.2 |
Expected asset return |  |  |  |  |  | (7.2) |  |  | (8.0) |
Amortized loss |  |  |  |  |  | 1.0 |  |  | 1.9 |
Net periodic benefit cost (credit) |  |  |  |  |  | $ | 0.1 |  |  | $ | (1.4) |
|  |  |  |  |  | Other Postretirement Benefits
|  |  |  | Three Months Ended
|  |  |  | March 31,
|  |  |  |  |  | 2023 |  | 2022
|  |  |  |  |  | (in millions)
Service cost |  |  |  |  |  | $ | — |  |  | $ | 0.1 |
Interest cost |  |  |  |  |  | 2.5 |  |  | 2.1 |
Amortized loss (gain) |  |  |  |  |  | (2.1) |  |  | 0.1 |
Amortized prior service credit |  |  |  |  |  | (0.1) |  |  | (0.2) |
Net periodic benefit cost |  |  |  |  |  | $ | 0.3 |  |  | $ | 2.1 |
The noncurrent liabilities associated with our pension and other postretirement benefit plans are classified as Postretirement benefits and other long-term liabilities on our Condensed Consolidated Balance Sheets. As of March 31, 2023 and December 31, 2022, we have a noncurrent pension liability of $71.7 million and $73.5 million, respectively. As of March 31, 2023 and December 31, 2022, we have a noncurrent other postretirement benefits liability of $303.3 million and $304.8 million, respectively. Due to the availability of our pre-funded pension balances (previous contributions in excess of prior required pension contributions), we expect our regulatory pension funding requirements in 2023 to be less than $1.0 million. We expect our cash payments for other postretirement benefit obligations in 2023, net of GM cost sharing, to be approximately $14.6 million.

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