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Segment Information (Tables) | 6 Months Ended
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Jun. 30, 2021
Segment Reporting [Abstract] |
Schedule of Operating Results of Alcoa's Reportable Segments | The operating results of Alcoa Corporation’s reportable segments were as follows (differences between segment totals and consolidated amounts are in Corporate):
|  | Bauxite |  |  | Alumina |  |  | Aluminum |  |  | Total |
Second quarter ended June 30, 2021 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Sales: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Third-party sales |  | $ | 39 |  |  | $ | 688 |  |  | $ | 2,102 |  |  | $ | 2,829 |
Intersegment sales |  |  | 179 |  |  |  | 343 |  |  |  | 3 |  |  |  | 525 |
Total sales |  | $ | 218 |  |  | $ | 1,031 |  |  | $ | 2,105 |  |  | $ | 3,354 |
Segment Adjusted EBITDA |  | $ | 41 |  |  | $ | 124 |  |  | $ | 460 |  |  | $ | 625 |
Supplemental information: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Depreciation, depletion, and amortization |  | $ | 32 |  |  | $ | 50 |  |  | $ | 73 |  |  | $ | 155 |
Equity (loss) income |  | $ | — |  |  | $ | (1 | ) |  | $ | 28 |  |  | $ | 27 |
Second quarter ended June 30, 2020 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Sales: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Third-party sales |  | $ | 66 |  |  | $ | 603 |  |  | $ | 1,475 |  |  | $ | 2,144 |
Intersegment sales |  |  | 245 |  |  |  | 289 |  |  |  | 2 |  |  | $ | 536 |
Total sales |  | $ | 311 |  |  | $ | 892 |  |  | $ | 1,477 |  |  | $ | 2,680 |
Segment Adjusted EBITDA |  | $ | 131 |  |  | $ | 88 |  |  | $ | (34 | ) |  | $ | 185 |
Supplemental information: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Depreciation, depletion, and amortization |  | $ | 30 |  |  | $ | 37 |  |  | $ | 79 |  |  | $ | 146 |
Equity loss |  | $ | — |  |  | $ | (8 | ) |  | $ | (12 | ) |  | $ | (20 | )
|  | Bauxite |  |  | Alumina |  |  | Aluminum |  |  | Total |
Six months ended June 30, 2021 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Sales: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Third-party sales |  | $ | 97 |  |  | $ | 1,448 |  |  | $ | 4,149 |  |  | $ | 5,694 |
Intersegment sales |  |  | 364 |  |  |  | 707 |  |  |  | 5 |  |  |  | 1,076 |
Total sales |  | $ | 461 |  |  | $ | 2,155 |  |  | $ | 4,154 |  |  | $ | 6,770 |
Segment Adjusted EBITDA |  | $ | 100 |  |  | $ | 351 |  |  | $ | 743 |  |  | $ | 1,194 |
Supplemental information: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Depreciation, depletion, and amortization |  | $ | 89 |  |  | $ | 96 |  |  | $ | 146 |  |  | $ | 331 |
Equity (loss) income |  |  | — |  |  |  | (6 | ) |  |  | 41 |  |  |  | 35 |
Six months ended June 30, 2020 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Sales: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Third-party sales |  | $ | 137 |  |  | $ | 1,310 |  |  | $ | 3,073 |  |  | $ | 4,520 |
Intersegment sales |  |  | 480 |  |  |  | 625 |  |  |  | 5 |  |  |  | 1,110 |
Total sales |  | $ | 617 |  |  | $ | 1,935 |  |  | $ | 3,078 |  |  | $ | 5,630 |
Segment Adjusted EBITDA |  | $ | 251 |  |  | $ | 281 |  |  | $ | 28 |  |  | $ | 560 |
Supplemental information: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Depreciation, depletion, and amortization |  | $ | 64 |  |  | $ | 86 |  |  | $ | 160 |  |  | $ | 310 |
Equity loss |  |  | — |  |  |  | (17 | ) |  |  | (7 | ) |  |  | (24 | )
Schedule of Segment Adjusted EBITDA to Consolidated Net Income (Loss) Attributable to Alco Corporation | The following table reconciles total Segment Adjusted EBITDA to Consolidated net income (loss) attributable to Alcoa Corporation:
|  | Second quarter ended June 30, |  |  | Six months ended June 30, |
|  | 2021 |  |  | 2020 |  |  | 2021 |  |  | 2020 |
Total Segment Adjusted EBITDA |  | $ | 625 |  |  | $ | 185 |  |  | $ | 1,194 |  |  | $ | 560 |
Unallocated amounts: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Transformation(1) |  |  | (13 | ) |  |  | (10 | ) |  |  | (24 | ) |  |  | (26 | )
Intersegment eliminations |  |  | 35 |  |  |  | 30 |  |  |  | 28 |  |  |  | 22 |
Corporate expenses(2) |  |  | (28 | ) |  |  | (21 | ) |  |  | (54 | ) |  |  | (48 | )
Provision for depreciation, depletion, and amortization |  |  | (161 | ) |  |  | (152 | ) |  |  | (343 | ) |  |  | (322 | )
Restructuring and other charges, net (D) |  |  | (33 | ) |  |  | (37 | ) |  |  | (40 | ) |  |  | (39 | )
Interest expense |  |  | (67 | ) |  |  | (32 | ) |  |  | (109 | ) |  |  | (62 | )
Other income (expenses), net (Q) |  |  | 105 |  |  |  | (51 | ) |  |  | 129 |  |  |  | 81 |
Other(3) |  |  | (2 | ) |  |  | (17 | ) |  |  | (8 | ) |  |  | (52 | )
Consolidated income (loss) before income taxes |  |  | 461 |  |  |  | (105 | ) |  |  | 773 |  |  |  | 114 |
Provision for income taxes |  |  | (111 | ) |  |  | (45 | ) |  |  | (204 | ) |  |  | (125 | )
Net income attributable to noncontrolling interest |  |  | (41 | ) |  |  | (47 | ) |  |  | (85 | ) |  |  | (106 | )
Consolidated net income (loss) attributable to Alcoa Corporation |  | $ | 309 |  |  | $ | (197 | ) |  | $ | 484 |  |  | $ | (117 | )
(1) | Transformation includes, among other items, the Adjusted EBITDA of previously closed operations.
(2) | Corporate expenses are composed of general administrative and other expenses of operating the corporate headquarters and other global administrative facilities, as well as research and development expenses of the corporate technical center.
(3) | Other includes certain items that impact Cost of goods sold on Alcoa Corporation’s Statement of Consolidated Operations that are not included in the Adjusted EBITDA of the reportable segments.
Schedule of Sales by Product Division | The following table details Alcoa Corporation’s Sales by product division:
|  | Second quarter ended June 30, |  |  | Six months ended June 30, |
|  | 2021 |  |  | 2020 |  |  | 2021 |  |  | 2020 |
Primary aluminum |  | $ | 2,112 |  |  | $ | 1,202 |  |  | $ | 3,839 |  |  | $ | 2,499 |
Alumina |  |  | 684 |  |  |  | 600 |  |  |  | 1,444 |  |  |  | 1,307 |
Flat-rolled aluminum(1) |  |  | — |  |  |  | 271 |  |  |  | 320 |  |  |  | 543 |
Energy |  |  | 49 |  |  |  | 22 |  |  |  | 88 |  |  |  | 74 |
Bauxite |  |  | 34 |  |  |  | 61 |  |  |  | 86 |  |  |  | 120 |
Other(2) |  |  | (46 | ) |  |  | (8 | ) |  |  | (74 | ) |  |  | (14 | )
|  | $ | 2,833 |  |  | $ | 2,148 |  |  | $ | 5,703 |  |  | $ | 4,529 |
(1) | Flat-rolled aluminum represented sales of the Warrick Rolling Mill through the sale of the facility on March 31, 2021 (see Note C).
(2) | Other includes realized gains and losses related to embedded derivative instruments designated as cash flow hedges of forward sales of aluminum.

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- Definition Tabular disclosure of the profit or loss and total assets for each reportable segment. An entity discloses certain information on each reportable segment if the amounts (a) are included in the measure of segment profit or loss reviewed by the chief operating decision maker or (b) are otherwise regularly provided to the chief operating decision maker, even if not included in that measure of segment profit or loss. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 22 -URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e8736-108599 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 25 -URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e8813-108599 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=121556970&loc=d3e13816-109267 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 30 -URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e8906-108599 + Details
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