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Accumulated Other Comprehensive Income (Loss) | 9 Months Ended
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Sep. 29, 2024
Equity [Abstract] |
Accumulated Other Comprehensive Income (Loss) | Accumulated Other Comprehensive Income (Loss) The changes in AOCI by component, net of tax, for the quarter ended September 29, 2024 were as follows (in millions):
| Post- retirement benefit plans |  | Currency translation adjustment |  | Derivatives |  | Deferred Tax Asset Valuation Allowance |  | Total
Attributable to ATI: |  |  |  |  |  |  |  |  |  |  |  |  |
Balance, June 30, 2024 | $ | (30.7) |  |  | $ | (77.9) |  |  | $ | (4.9) |  |  | $ | 23.3 |  |  | $ | (90.2) |
OCI before reclassifications |  | — |  |  |  | 13.4 |  |  |  | (1.5) |  |  |  | — |  |  | 11.9 |
Amounts reclassified from AOCI | (a) | 0.9 |  |  | (b) | — |  |  | (c) | 2.8 |  |  | (d) | — |  |  | 3.7 |
Net current-period OCI |  | 0.9 |  |  |  | 13.4 |  |  |  | 1.3 |  |  |  | — |  |  | 15.6 |
Balance, September 29, 2024 | $ | (29.8) |  |  | $ | (64.5) |  |  | $ | (3.6) |  |  | $ | 23.3 |  |  | $ | (74.6) |
Attributable to noncontrolling interests: |  |  |  |  |  |  |  |  |  |  |  |  |
Balance, June 30, 2024 | $ | — |  |  | $ | 6.5 |  |  | $ | — |  |  | $ | — |  |  | $ | 6.5 |
OCI before reclassifications |  | — |  |  |  | 4.0 |  |  |  | — |  |  |  | — |  |  | 4.0 |
Amounts reclassified from AOCI |  | — |  |  | (b) | — |  |  |  | — |  |  |  | — |  |  | — |
Net current-period OCI |  | — |  |  |  | 4.0 |  |  |  | — |  |  |  | — |  |  | 4.0 |
Balance, September 29, 2024 | $ | — |  |  | $ | 10.5 |  |  | $ | — |  |  | $ | — |  |  | $ | 10.5 |
The changes in AOCI by component, net of tax, for the year-to-date period ended September 29, 2024 were as follows (in millions):
| Post- retirement benefit plans |  | Currency translation adjustment |  | Derivatives |  | Deferred Tax Asset Valuation Allowance |  | Total
Attributable to ATI: |  |  |  |  |  |  |  |  |  |  |  |  |
Balance, December 31, 2023 | $ | (32.5) |  |  | $ | (68.4) |  |  | $ | (6.4) |  |  | $ | 24.1 |  |  | $ | (83.2) |
OCI before reclassifications |  | — |  |  |  | 3.9 |  |  |  | (3.3) |  |  |  | — |  |  | 0.6 |
Amounts reclassified from AOCI | (a) | 2.7 |  |  | (b) | — |  |  | (c) | 6.1 |  |  | (d) | (0.8) |  |  | 8.0 |
Net current-period OCI |  | 2.7 |  |  |  | 3.9 |  |  |  | 2.8 |  |  |  | (0.8) |  |  | 8.6 |
Balance, September 29, 2024 | $ | (29.8) |  |  | $ | (64.5) |  |  | $ | (3.6) |  |  | $ | 23.3 |  |  | $ | (74.6) |
Attributable to noncontrolling interests: |  |  |  |  |  |  |  |  |  |  |  |  |
Balance, December 31, 2023 | $ | — |  |  | $ | 7.3 |  |  | $ | — |  |  | $ | — |  |  | $ | 7.3 |
OCI before reclassifications |  | — |  |  |  | 3.2 |  |  |  | — |  |  |  | — |  |  | 3.2 |
Amounts reclassified from AOCI |  | — |  |  | (b) | — |  |  |  | — |  |  |  | — |  |  | — |
Net current-period OCI |  | — |  |  |  | 3.2 |  |  |  | — |  |  |  | — |  |  | 3.2 |
Balance, September 29, 2024 | $ | — |  |  | $ | 10.5 |  |  | $ | — |  |  | $ | — |  |  | $ | 10.5 |
(a)Amounts were included in net periodic benefit cost for pension and other postretirement benefit plans (see Note 12). (b)No amounts were reclassified to earnings. (c)Amounts related to derivatives are included in sales, cost of goods sold or interest expense in the period or periods the hedged item affects earnings (see Note 9). (d)Represents the net change in deferred tax asset valuation allowances on changes in AOCI balances between the balance sheet dates. The income tax provision for the year-to-date period ended September 29, 2024 includes $0.8 million of a tax benefit for the recognition of a stranded deferred tax valuation allowance that was associated with the Company’s interest rate swap due to its maturity (see Notes 9 and 13). The changes in AOCI by component, net of tax, for the quarter ended October 1, 2023 were as follows (in millions):
| Post- retirement benefit plans |  | Currency translation adjustment |  | Derivatives |  | Deferred Tax Asset Valuation Allowance |  | Total
Attributable to ATI: |  |  |  |  |  |  |  |  |  |  |  |  |
Balance, July 2, 2023 | $ | (32.6) |  |  | $ | (73.6) |  |  | $ | (1.1) |  |  | $ | 20.0 |  |  | $ | (87.3) |
OCI before reclassifications |  | — |  |  |  | (7.1) |  |  |  | (2.4) |  |  |  | — |  |  | (9.5) |
Amounts reclassified from AOCI | (a) | 1.0 |  |  | (b) | — |  |  | (c) | 1.4 |  |  | (d) | — |  |  | 2.4 |
Net current-period OCI |  | 1.0 |  |  |  | (7.1) |  |  |  | (1.0) |  |  |  | — |  |  | (7.1) |
Balance, October 1, 2023 | $ | (31.6) |  |  | $ | (80.7) |  |  | $ | (2.1) |  |  | $ | 20.0 |  |  | $ | (94.4) |
Attributable to noncontrolling interests: |  |  |  |  |  |  |  |  |  |  |  |  |
Balance, July 2, 2023 | $ | — |  |  | $ | 6.4 |  |  | $ | — |  |  | $ | — |  |  | $ | 6.4 |
OCI before reclassifications |  | — |  |  |  | (2.1) |  |  |  | — |  |  |  | — |  |  | (2.1) |
Amounts reclassified from AOCI |  | — |  |  | (b) | — |  |  |  | — |  |  |  | — |  |  | — |
Net current-period OCI |  | — |  |  |  | (2.1) |  |  |  | — |  |  |  | — |  |  | $ | (2.1) |
Balance, October 1, 2023 | $ | — |  |  | $ | 4.3 |  |  | $ | — |  |  | $ | — |  |  | $ | 4.3 |
The changes in AOCI by component, net of tax, for the year-to-date period ended October 1, 2023 were as follows (in millions):
| Post- retirement benefit plans |  | Currency translation adjustment |  | Derivatives |  | Deferred Tax Asset Valuation Allowance |  | Total
Attributable to ATI: |  |  |  |  |  |  |  |  |  |  |  |  |
Balance, January 1, 2023 | $ | (34.7) |  |  | $ | (70.1) |  |  | $ | 13.5 |  |  | $ | 23.9 |  |  | $ | (67.4) |
OCI before reclassifications |  | — |  |  |  | (10.6) |  |  |  | (15.7) |  |  |  | — |  |  | (26.3) |
Amounts reclassified from AOCI | (a) | 3.1 |  |  | (b) | — |  |  | (c) | 0.1 |  |  | (d) | (3.9) |  |  | (0.7) |
Net current-period OCI |  | 3.1 |  |  |  | (10.6) |  |  |  | (15.6) |  |  |  | (3.9) |  |  | (27.0) |
Balance, October 1, 2023 | $ | (31.6) |  |  | $ | (80.7) |  |  | $ | (2.1) |  |  | $ | 20.0 |  |  | $ | (94.4) |
Attributable to noncontrolling interests: |  |  |  |  |  |  |  |  |  |  |  |  |
Balance, January 1, 2023 | $ | — |  |  | $ | 7.7 |  |  | $ | — |  |  | $ | — |  |  | $ | 7.7 |
OCI before reclassifications |  | — |  |  |  | (3.4) |  |  |  | — |  |  |  | — |  |  | (3.4) |
Amounts reclassified from AOCI |  | — |  |  | (b) | — |  |  |  | — |  |  |  | — |  |  | — |
Net current-period OCI |  | — |  |  |  | (3.4) |  |  |  | — |  |  |  | — |  |  | $ | (3.4) |
Balance, October 1, 2023 | $ | — |  |  | $ | 4.3 |  |  | $ | — |  |  | $ | — |  |  | $ | 4.3 |
(a)Amounts were included in net periodic benefit cost for pension and other postretirement benefit plans (see Note 12). (b)No amounts were reclassified to earnings. (c)Amounts related to derivatives are included in sales, cost of goods sold or interest expense in the period or periods the hedged item affects earnings (see Note 9). (d)Represents the net change in deferred tax asset valuation allowances on changes in AOCI balances between the balance sheet dates. Other comprehensive income (loss) amounts (OCI) reported above by category are net of applicable income tax expense (benefit) for each period presented. Income tax expense (benefit) on OCI items is recorded as a change in a deferred tax asset or liability. Amounts recognized in OCI include the impact of any deferred tax asset valuation allowances, when applicable. Foreign currency translation adjustments, including those pertaining to noncontrolling interests, are generally not adjusted for income taxes as they relate to indefinite investments in non-U.S. subsidiaries. Reclassifications out of AOCI for the quarters and year-to-date periods ended September 29, 2024 and October 1, 2023 were as follows:
Details about AOCI Components (In millions) | Three months ended September 29, 2024 |  | Three months ended October 1, 2023 |  | Year-to-date period ended September 29, 2024 |  | Year-to-date period ended October 1, 2023 |  | Affected line item in the statements of operations
Postretirement benefit plans |  |  |  |  |  |  |  |  |
Prior service credit | $ | 0.1 |  |  | 0.1 |  |  | $ | 0.4 |  |  | $ | 0.4 |  | (a) |
Actuarial losses | (1.3) |  |  | (1.5) |  |  | (3.9) |  |  | (4.5) |  | (a) |
| (1.2) |  |  | (1.4) |  |  | (3.5) |  |  | (4.1) |  | (c) | Total before tax
| (0.3) |  |  | (0.4) |  |  | (0.8) |  |  | (1.0) |  |  | Tax benefit (d)
| $ | (0.9) |  |  | $ | (1.0) |  |  | $ | (2.7) |  |  | $ | (3.1) |  |  | Net of tax
Derivatives |  |  |  |  |  |  |  |  |
Nickel and other raw material contracts | $ | (1.9) |  |  | $ | (0.5) |  |  | $ | (3.3) |  |  | $ | 4.6 |  | (b) |
Natural gas contracts | (1.8) |  |  | (1.8) |  |  | (6.5) |  |  | (6.0) |  | (b) |
Foreign exchange contracts | — |  |  | 0.2 |  |  | 0.2 |  |  | 0.3 |  | (b) |
Interest rate swap | — |  |  | 0.3 |  |  | 1.6 |  |  | 1.0 |  | (b) |
| (3.7) |  |  | (1.8) |  |  | (8.0) |  |  | (0.1) |  | (c) | Total before tax
| (0.9) |  |  | (0.4) |  |  | (1.9) |  |  | — |  |  | Tax expense (benefit) (d)
| $ | (2.8) |  |  | $ | (1.4) |  |  | $ | (6.1) |  |  | $ | (0.1) |  |  | Net of tax
(a)Amounts are reported in nonoperating retirement benefit expense (see Note 12). (b)Amounts related to derivatives, with the exception of the interest rate swap, are included in sales or cost of goods sold in the period or periods the hedged item affects earnings. Amounts related to the interest rate swap are included in interest expense in the same period as the interest expense on the Term Loan is recognized in earnings (see Note 9). (c)For pre-tax items, positive amounts are income and negative amounts are expense in terms of the impact to net income. Tax effects are presented in conformity with ATI’s presentation in the consolidated statements of operations. (d)These amounts exclude the impact of any deferred tax asset valuation allowances, when applicable.

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- Definition Accumulated change in equity from transactions and other events and circumstances from non-owner sources, net of tax effect, at fiscal year-end. Excludes Net Income (Loss), and accumulated changes in equity from transactions resulting from investments by owners and distributions to owners. Includes foreign currency translation items, certain pension adjustments, and unrealized gains and losses on certain investments in debt and equity securities as well as changes in the fair value of derivatives related to the effective portion of a designated cash flow hedge + References No definition available. + Details
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