Table of Contents terephthalate containers, as well as, cardboard and other paper products. We also use a significant amount of diesel fuel, natural gas and electricity in our operations. The supply and price of these raw materials and commodities can be affected by a number of factors beyond our control, including market demand, alternative sources for suppliers, global geopolitical events (especially as to their impact on crude oil prices and the resulting impact on diesel fuel prices), global disease outbreaks or pandemics, such as the coronavirus pandemic, trade agreements among producing and consuming nations, governmental regulations, including tariffs, frosts, droughts and other weather conditions, changes in precipitation patterns, the frequency of extreme weather events, economic factors affecting growth decisions, inflation, plant diseases, theft and industry surcharges and other practices. For example, in June 2018, U.S. tariffs on aluminum imports from Canada, Mexico and EU went into effect (though the U.S. lifted the aluminum tariffs on Canada and Mexico in May 2019), which has created volatility in the price of aluminum in the U.S. and increased the price of aluminum used in some of our product packaging. In addition, our North America business unit is exposed to variability in the market price of a regional premium differential (referred to as “Midwest Premium” in the U.S.) charged by industry participants to deliver aluminum from the smelter to the manufacturing facility. This premium differential also fluctuates in relation to several conditions, including based on the supply of and demand for aluminum in a particular region, associated transportation costs and warehouse financing transactions, which limit the amount of physical aluminum available to consumers and increases the price differential as a result. During times of greater volatility in the Midwest Premium, the variability in our cost of goods sold can also increase. In addition to impacting the price we pay for the raw materials we purchase, changing premium differentials impact our end consumers as we must either pass on the increased cost to those consumers or experience a decrease in our profit margins as a result of the Midwest Premium differential. Increases in the Midwest Premium, or the inability to pass through any fluctuation in aluminum prices or regional premiums to our end consumers, could have a material adverse effect on our business, financial condition, results of operations and cash flow. Further, despite our ability to source raw materials necessary to meet demand for our products, certain raw materials such as barely, malted barley, hops, corn, other various starches, water and packaging materials, including aluminum cans and, bottles, glass and polyethylene terephthalate containers, as well as cardboard and other paper products, have been adversely impacted by the coronavirus pandemic. In recent years, we experienced a shift in the allocation among different packaging types toward aluminum cans and bottles and away from glass bottles. This accelerated in 2020 due to the coronavirus pandemic where we observed a shift in volume to off-premise channels and aluminum cans and away from on-premise channels and glass bottles. In general, aluminum cans allow for lower packaging costs compared to most other types of packaging materials. The trend away from glass bottles could result in higher fixed cost deleverage related to these assets and an ultimate decreased need for the assets that support this packaging, which could adversely impact profitability. In Canada, the standard returnable bottle requires significant investment behind our returnable bottle inventory and bottling equipment. Although we are unable to predict the impact to our ability to source these materials in the future, we expect these supply pressures to continue into 2021. We distribute our products and receive raw materials primarily by rail or truck. Reduced availability of rail or trucking capacity has caused, and could continue to cause, us to incur unanticipated expenses. In particular, reduced trucking capacity due to shortages of drivers, as a result of the coronavirus pandemic, and a federal regulation requiring drivers to electronically log their driving hours, among other reasons, have caused an increase in the cost of transportation for us and our suppliers. We believe commodity and other cost increases and volatility especially due to the coronavirus pandemic, could continue in the future. If such increases occur or exceed our estimates or projections and we are not able to increase the prices of our products or achieve cost savings to offset such cost increases, our business, financial condition and results of operations would be harmed. In addition, even if we increase the prices of our products in response to increases in the cost of commodities or other cost increases, we may not be able to sustain our price increases. Sustained price increases may lead to declines in volume as competitors may not adjust their prices or consumers may decide not to pay the higher prices, which could lead to sales declines and loss of market share, and our projections may not accurately predict the volume impact of price increases, which could adversely affect our business, financial condition and results of operations. Furthermore, to the extent any of the foregoing factors affect the availability or prices of ingredients or packaging or our hedging arrangements do not effectively or completely hedge changes in commodity price risks and we are not able to pass these increased costs along to customers, our business and financial results could also be materially adversely impacted. We may incur impairments of the carrying value of our goodwill and other intangible assets which could have a material adverse effect on our business and financial results. In connection with various business combinations, we have historically allocated material amounts of the related purchase prices to goodwill and other intangible assets that are considered to have indefinite useful lives. For example, as a result of the acquisition of the remaining portion of MillerCoors LLC ("MillerCoors") which occurred on October 11, 2016 (the "Acquisition"), we allocated approximately $6.3 billion and $7.6 billion to goodwill and indefinite-lived intangible assets, respectively. These assets are tested for impairment at least annually, using estimates and assumptions affected by factors such as economic and industry conditions and changes in operating performance. Additionally, in conjunction with the brand impairment tests, we also reassess each brand's indefinite-life classification. Potential resulting charges from an impairment of goodwill or brand intangible, as well as reclassification of an indefinite-lived to a definite-lived brand intangible, could have a material adverse effect on our results of operations. For example, the results of our annual goodwill impairment testing completed as of October 1, 2020, indicated that the fair value of 27