amortization. Amortization is recorded using the straight-line method over the estimated lives of the assets as this approximates the pattern in which the assets economic benefits are consumed. We apply the equity method of accounting to 20% to 50% owned investments where we exercise significant influence or VIEs for which we are not the primary beneficiary. We use the cumulative earnings approach for determining cash flow presentation of cash distributions received from equity method investees. Distributions received are included in our consolidated statements of cash flows as operating activities, unless the cumulative distributions exceed our portion of the cumulative equity in the net earnings of the equity method investment, in which case the excess distributions are deemed to be returns of the investment and are classified as investing activities in our consolidated statements of cash flows. Equity method investments as of December 31, 2018, include Brewers' Retail, Inc. ("BRI") and Brewers' Distributor Ltd. ("BDL") in Canada. There are no related parties that own interests in our equity method investments as of December 31, 2018. We use derivatives as part of our normal business operations to manage our exposure to fluctuations in interest rates, foreign currency exchange, commodity prices, production and packaging material costs and for other strategic purposes related to our core business. We enter into derivatives for risk management purposes only, including derivatives designated in hedge accounting relationships as well as those derivatives utilized as economic hedges. We do not enter into derivatives for trading or speculative purposes. We recognize our derivatives on the consolidated balance sheets as assets or liabilities at fair value and are classified in either current or non-current assets or liabilities based on each contract's respective unrealized gain or loss position and each contract's respective maturity. Our policy is to present all derivative balances on a gross basis, without regard to counterparty master netting agreements or similar arrangements. Further, our current derivative agreements do not allow us to net positions with the same counterparty and therefore, we present our derivative positions gross in our consolidated balance sheets. Changes in fair values of outstanding cash flow and net investment hedges are recorded in OCI, until earnings are affected by the variability of cash flows of the underlying hedged item or the sale of the underlying net investment, respectively. Effective cash flow hedges offset the gains or losses recognized on the underlying exposure in the consolidated statements of operations, or for net investment hedges, the foreign exchange translation gain or loss recognized in AOCI. Changes in fair value of outstanding fair value hedges and the offsetting changes in fair value of the hedged item are recognized in earnings. Changes in fair value of the derivative attributable to components allowed to be excluded from the assessment of hedge effectiveness are deferred in AOCI and recognized in earnings over the life of the hedge. We record realized gains and losses from derivative instruments in the same financial statement line item as the hedged item/forecasted transaction. Changes in unrealized gains and losses for derivatives not designated in a hedge accounting relationship are recorded directly in earnings each period and are also recorded in the same financial statement line item as the hedged item/forecasted transaction. Cash flows from the settlement of derivatives, including both economic hedges and those designated in hedge accounting relationships, appear in the consolidated statements of cash flows in the same categories as the cash flows of the hedged item. In accordance with authoritative accounting guidance, we do not record the fair value of derivatives for which we have elected the Normal Purchase Normal Sale ("NPNS") exemption. We account for these contracts on an accrual basis, recording realized settlements related to these contracts in the same financial statement line items as the corresponding transaction. We maintain retirement plans for the majority of our employees. We offer different types of plans within each segment, including defined benefit plans, defined contribution plans and OPEB plans. Each plan is managed locally and in accordance with respective local laws and regulations. Our equity investments, BRI and BDL, maintain defined benefit, defined contribution and postretirement benefit plans as well. We recognize the underfunded or overfunded status of a defined benefit postretirement plan as an asset or liability in the consolidated balance sheets and recognize changes in the funded status in the year in which the changes occur within OCI. The funded status of a plan, measured as the difference between the fair value of plan assets and the projected benefit obligation, and the related net periodic pension cost are calculated using a number of significant actuarial assumptions. Changes in net periodic pension cost and funding status may occur in the future due to changes in these assumptions. 97 Pension and Postretirement Benefits Derivative Hedging Instruments Equity Method Investments