45-1 In the preparation of consolidated financial statements, intra-entity balances and transactions shall be eliminated. This includes intra-entity open account balances, security holdings, sales and purchases, interest, dividends, and so forth. As consolidated financial statements are based on the assumption that they represent the financial position and operating results of a single economic entity, such statements shall not include gain or loss on transactions among the entities in the consolidated group. Accordingly, any intra-entity profit or loss on assets remaining within the consolidated group shall be eliminated; the concept usually applied for this purpose is gross profit or loss (see also paragraph 810-10-45-8).
45-18 The amount of intra-entity income or loss to be eliminated in accordance with paragraph 810-10-45-1 is not affected by the existence of a noncontrolling interest. The complete elimination of the intra-entity income or loss is consistent with the underlying assumption that consolidated financial statements represent the financial position and operating results of a single economic entity. The elimination of the intra-entity income or loss may be allocated between the parent and noncontrolling interests.
ASC 980-810-45-1 provides an exception under which profit on sales to regulated affiliates would not be eliminated when specific criteria are met.