•	the percentage by which fair value exceeded carrying value at the date of the most recent step one test;

•	the amount of goodwill allocated to the reporting unit;

•	a more detailed description of the methods and key assumptions used and how the key assumptions were determined;

•	a discussion of the degree of uncertainty associated with the assumptions; and

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•	a description of potential events and/or changes in circumstances that could reasonably be expected to negatively affect the key assumptions.

•	the timing of the two acquisitions giving rise to the goodwill: both acquisitions were within approximately one year from the date of our annual impairment testing, and we determined such acquisitions to be at fair value;

•	the nature of the operating cash flows from both of the businesses acquired: the operating cash flows are long-term contracted, U.S. dollar-denominated, with credit-worthy counterparties and, in the case of the business’ pipelines assets, regulated, which factors provide for less volatility in the overall businesses and in the assumptions used in our annual impairment testing;

•	the positive operating results from the businesses acquired: both acquisitions have yielded operating results at or above expectations since the acquisitions;

•	the strategic advantages that these acquisitions have provided: both acquisitions have facilitated our pursuit of additional opportunities in the Mexican energy market; and

•	macroeconomic conditions, which continue to be positive in support of infrastructure growth.

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