The equity method is governed by ASC 323. It generally applies when an investor can exercise significant influence over an investee without controlling it, which is presumed when the investor holds 20 percent to 50 percent of the voting stock. Companies tag the result in XBRL as IncomeLossFromEquityMethodInvestments. Regulation S-X Rule 5-03.12 names it as its own caption and asks companies to disclose the dividends they received from these investees.
Placement varies. S-X lists the caption after income tax expense, so many companies show it net of the investee's taxes below the tax line, but the rule lets a company present it elsewhere if circumstances justify it. Some companies whose affiliates are central to their business report it inside operating income. Check where it sits before comparing pretax income or operating margins across companies.
This income is largely non-cash. The company books its share of the investee's earnings whether or not any cash is distributed, which is why the cash flow statement subtracts undistributed equity income, tagged IncomeLossFromEquityMethodInvestmentsNetOfDividendsOrDistributions, when reconciling net income to operating cash flow. Analysts often strip affiliate income out of operating measures and value the stakes separately, since the underlying revenue, debt, and assets never appear on the investor's consolidated statements.