supplemental pro forma financial information ( unaudited ) the following table presents summarized unaudited pro forma financial information as if sikorsky had been included in our financial results for the entire year in 2015 ( in millions ) : .
what was the tax rate associated with the recognized a non-cash net gain from obtaining a controlling interest in awe
the unaudited supplemental pro forma financial data above has been calculated after applying our accounting policies and adjusting the historical results of sikorskywith pro forma adjustments , net of tax , that assume the acquisition occurred on january 1 , 2015 . significant pro forma adjustments include the recognition of additional amortization expense related to acquired intangible assets and additional interest expense related to the short-term debt used to finance the acquisition . these adjustments assume the application of fair value adjustments to intangibles and the debt issuance occurred on january 1 , 2015 and are approximated as follows : amortization expense of $ 125million and interest expense of $ 40million . in addition , significant nonrecurring adjustments include the elimination of a $ 72million pension curtailment loss , net of tax , recognized in 2015 and the elimination of a $ 58 million income tax charge related to historic earnings of foreign subsidiaries recognized by sikorsky in 2015 . the unaudited supplemental pro forma financial information also reflects an increase in interest expense , net of tax , of approximately $ 110 million in 2015 . the increase in interest expense is the result of assuming the november 2015 notes were issued on january 1 , 2015 . proceeds of the november 2015 notes were used to repay all outstanding borrowings under the 364- day facility used to finance a portion of the purchase price of sikorsky , as contemplated at the date of acquisition . the unaudited supplemental pro forma financial information does not reflect the realization of any expected ongoing cost or revenue synergies relating to the integration of the two companies . further , the pro forma data should not be considered indicative of the results that would have occurred if the acquisition , related financing and associated notes issuance and repayment of the 364-day facility had been consummated on january 1 , 2015 , nor are they indicative of future results . consolidation of awemanagement limited on august 24 , 2016 , we increased our ownership interest in the awe joint venture , which operates the united kingdom 2019s nuclear deterrent program , from 33% ( 33 % ) to 51% ( 51 % ) . at which time , we began consolidating awe . consequently , our operating results include 100% ( 100 % ) of awe 2019s sales and 51% ( 51 % ) of its operating profit . prior to increasing our ownership interest , we accounted for our investment inawe using the equity method of accounting . under the equity method , we recognized only 33% ( 33 % ) ofawe 2019s earnings or losses and no sales.accordingly , prior toaugust 24 , 2016 , the date we obtained control , we recorded 33%ofawe 2019s net earnings in our operating results and subsequent to august 24 , 2016 , we recognized 100% ( 100 % ) of awe 2019s sales and 51% ( 51 % ) of its operating profit . we accounted for this transaction as a 201cstep acquisition 201d ( as defined by u.s . gaap ) , which requires us to consolidate and record the assets and liabilities ofawe at fair value.accordingly , we recorded intangible assets of $ 243million related to customer relationships , $ 32 million of net liabilities , and noncontrolling interests of $ 107 million . the intangible assets are being amortized over a period of eight years in accordance with the underlying pattern of economic benefit reflected by the future net cash flows . in 2016we recognized a non-cash net gain of $ 104million associatedwith obtaining a controlling interest inawewhich consisted of a $ 127 million pretax gain recognized in the operating results of our space business segment and $ 23 million of tax-related items at our corporate office . the gain represents the fair value of our 51% ( 51 % ) interest inawe , less the carrying value of our previously held investment inawe and deferred taxes . the gainwas recorded in other income , net on our consolidated statements of earnings . the fair value ofawe ( including the intangible assets ) , our controlling interest , and the noncontrolling interests were determined using the income approach . divestiture of the information systems & global solutions business onaugust 16 , 2016wedivested our former is&gsbusinesswhichmergedwithleidos , in areversemorristrust transactionrr ( the 201ctransaction 201d ) . the transaction was completed in a multi-step process pursuant to which we initially contributed the is&gs business to abacus innovations corporation ( abacus ) , a wholly owned subsidiary of lockheed martin created to facilitate the transaction , and the common stock ofabacus was distributed to participating lockheedmartin stockholders through an exchange offer . under the terms of the exchange offer , lockheedmartin stockholders had the option to exchange shares of lockheedmartin common stock for shares of abacus common stock . at the conclusion of the exchange offer , all shares of abacus common stock were exchanged for 9369694 shares of lockheed martin common stock held by lockheed martin stockholders that elected to participate in the exchange.the shares of lockheedmartin common stock thatwere exchanged and acceptedwere retired , reducing the number of shares of our common stock outstanding by approximately 3% ( 3 % ) . following the exchange offer , abacus merged with .