17. NON-CONTROLLING INTERESTS
Non-controlling interests represent the portion of net assets in consolidated entities that are not owned by the Company in renewable energy facilities.
On December 22, 2017, the U.S. government enacted comprehensive tax legislation commonly referred to as the Tax Cuts and Jobs Act, which enacted major changes to the U.S. tax code, including a reduction in the U.S. federal corporate income tax rate from 35% to 21%, effective January 1, 2018. Since the 21% rate enacted in December 2017 went into effect on January 1, 2018, the HLBV methodology utilized by the Company to determine the value of its non-controlling interests began to use the new rate on that date. The HLBV method is a point in time estimate that utilizes inputs and assumptions in effect at each balance sheet date based on the liquidation provisions of the respective operating partnership agreements. For the year ended December 31, 2018, $151.2 million of the decline in the non-controlling interests balance and a corresponding allocation of net loss attributable to non-controlling interests was driven by this reduction in the tax rate used in the HLBV methodology used by the Company. In the calculation of the carrying values through HLBV, the Company allocated significantly lower amounts to certain non-controlling interests (i.e., tax equity investors) in order to achieve their contracted after-tax rate of return as a result of the reduction of the federal income tax rate from 35% to 21% as specified in the Tax Act.
Redeemable Non-controlling Interests
Non-controlling interests in subsidiaries that are redeemable either at the option of the holder or at fixed and determinable prices at certain dates are classified as redeemable non-controlling interests in subsidiaries between liabilities and stockholders' equity in the consolidated balance sheets. The redeemable non-controlling interests in subsidiaries balance is determined using the hypothetical liquidation at book value method for the VIE funds or allocation of share of income or losses in other subsidiaries subsequent to initial recognition; however, the non-controlling interests balance cannot be less than the estimated redemption value.
During the second quarter of 2018, the Company discovered certain errors in its unaudited consolidated condensed financial statements for the periods ended March 31, 2018 and 2017, September 30, 2017, and June 30, 2017, and in its annual audited consolidated financial statements for the years ended December 31, 2017, 2016 and 2015. These errors relate to the Company’s accounting for certain intercompany transactions with non-wholly owned controlled subsidiaries and resulted in overstatements of the allocation of net income attributable to the redeemable non-controlling interests with corresponding understatements of the allocation of net income attributable to Class A common stockholders and non-controlling interests. The Company’s management assessed the impact of these adjustments and concluded the impact on the prior period financial statements was immaterial to each of the affected reporting periods and therefore amendment of previously filed reports was not required. However, the correction of the cumulative amount of the prior period errors would have been material to the current year consolidated financial statements and therefore, the Company corrected these errors in the prior periods included herein. These errors occurred between July 1, 2015, and March 31, 2018, therefore, there is no cumulative effect on the Company’s consolidated financial statements as of January 1, 2015. The correction had no impact on the previously reported amounts of consolidated cash flows from operating, investing or financing activities. The prior periods’ amounts related to the corrected balances have been revised as disclosed in the Company’s Quarterly Reports on Form 10-Q for each of the quarters ended June 30, 2018 and September 30, 2018, with sufficient information describing the nature of the changes that were made to the historical consolidated condensed financial statements.
The tables below summarize the effect of the corrections of the previously reported annual consolidated financial statement line items: