ACQUISITION OF ORBITAL ATK On June 6, 2018 , the company completed its previously announced acquisition of Orbital ATK, by acquiring all of the outstanding shares of Orbital ATK for a purchase price of $7.7 billion in cash. On the Merger date, Orbital ATK became a wholly-owned subsidiary of the company and its name was changed to Northrop Grumman Innovation Systems, Inc. We established Innovation Systems as a new, fourth business sector. Its main products include precision munitions and armaments; tactical missiles and subsystems; ammunition; launch vehicles; space and strategic propulsion systems; aerospace structures; space exploration products; and national security and commercial satellite systems and related components/services. The acquisition was financed with proceeds from the companys debt financing completed in October 2017 and cash on hand. We believe this acquisition will enable us to broaden our capabilities and offerings, provide additional innovative solutions to meet our customers emerging requirements, create value for shareholders and provide expanded opportunities for our combined employees. Preliminary Purchase Price Allocation The acquisition was accounted for as a purchase business combination. As such, the company recorded the assets acquired and liabilities assumed at fair value, with the excess of the purchase price over the fair value of assets acquired and liabilities assumed recorded as goodwill. Determining the fair value of assets acquired and liabilities assumed requires significant judgment, including the amount and timing of expected future cash flows, long-term growth rates and discount rates. In some cases, the company used discounted cash flow analyses, which were based on our best estimate of future sales, earnings and cash flows after considering such factors as general market conditions, customer budgets, existing firm and future orders, changes in working capital, long term business plans and recent operating performance. Use of different estimates and judgments could yield materially different results. During the second quarter of 2018, the company completed a preliminary analysis to determine the fair values of the assets acquired and liabilities assumed and the amounts recorded reflected managements initial assessment of fair value as of the Merger date. Based on additional information obtained to date, the company refined its initial assessment of fair value and recognized the following significant adjustments to our preliminary purchase price allocation: Intangible assets increased $220 million , Other current liabilities increased $114 million , Pension and other postretirement benefit (OPB) plan liabilities increased $56 million , Other non-current liabilities increased $53 million and Goodwill decreased $47 million . These adjustments did not result in a material impact on the financial results of prior periods. The company expects to finalize its purchase price allocation within one year of the Merger date. We are continuing to analyze and assess relevant information in the following areas to determine the fair value of assets acquired and liabilities assumed as of the Merger date: certain income tax, legal and contract-related matters. The final fair value determination could result in material adjustments to the values presented in the preliminary purchase price allocation table below. The Merger date fair value of the consideration transferred totaled $7.7 billion in cash, which was comprised of the following: $ in millions, except per share amounts Purchase price Shares of Orbital ATK common stock outstanding as of the Merger date 57,562,152 Cash consideration per share of Orbital ATK common stock $ 134.50 Total purchase price $ 7,742 The following preliminary purchase price allocation table presents the companys refined estimate of the fair values of assets acquired and liabilities assumed at the Merger date: $ in millions As of June 6, 2018 Cash and cash equivalents $ 85 Accounts receivable 596 Unbilled receivables 1,264 Inventoried costs 220 Other current assets 226 Property, plant and equipment 1,509 Goodwill 6,248 Intangible assets 1,525 Other non-current assets 151 Total assets acquired 11,824 Trade accounts payable (397 ) Accrued employee compensation (158 ) Advance payments and billings in excess of costs incurred (222 ) Below market contracts (1) (151 ) Other current liabilities (412 ) Long-term debt (1,687 ) Pension and OPB plan liabilities (613 ) Deferred tax liabilities (253 ) Other non-current liabilities (189 ) Total liabilities assumed (4,082 ) Total purchase price $ 7,742 (1) Included in Other current liabilities in the unaudited condensed consolidated statements of financial position. The following table presents a summary of purchased intangible assets and their related estimated useful lives: Fair Value (in millions) Estimated Useful Life in Years Customer contracts $ 1,245 9 Commercial customer relationships 280 13 Total customer-related intangible assets $ 1,525 The preliminary purchase price allocation resulted in the recognition of $6.2 billion of goodwill, a majority of which was allocated to the Innovation Systems sector. The goodwill recognized is attributable to expected revenue synergies generated by the integration of Aerospace Systems, Mission Systems and Technology Services products and technologies with those of legacy Orbital ATK, synergies resulting from the consolidation or elimination of certain costs, and intangible assets that do not qualify for separate recognition, such as the assembled workforce of Orbital ATK. None of the goodwill is expected to be deductible for tax purposes. Unaudited Supplemental Pro Forma Information The following table presents unaudited pro forma financial information prepared in accordance with Article 11 of Regulation S-X and computed as if Orbital ATK had been included in our results as of January 1, 2017 : $ in millions, except per share amounts Three Months Ended March 31, 2018 Sales $ 8,000 Net earnings 914 Diluted earnings per share 5.21 The unaudited supplemental pro forma financial data has been calculated after applying our accounting policies and adjusting the historical results of Orbital ATK with pro forma adjustments, net of tax, that assume the acquisition occurred on January 1, 2017. Significant pro forma adjustments include the following: 1. The elimination of intercompany sales and costs of sales between the company and Orbital ATK of $47 million for the three months ended March 31, 2018 . 2. The elimination of nonrecurring transaction costs incurred by the company and Orbital ATK in connection with the Merger of $7 million for the three months ended March 31, 2018 . 3. The recognition of additional depreciation expense, net of removal of historical depreciation expense, of $6 million for the three months ended March 31, 2018 related to the step-up in fair value of acquired property, plant and equipment. 4. The recognition of additional amortization expense, net of removal of historical amortization expense, of $66 million for the three months ended March 31, 2018 related to the fair value of acquired intangible assets. 5. The elimination of Orbital ATK's historical amortization of net actuarial losses and prior service credits and impact of the revised pension and OPB net periodic benefit cost as determined under the companys plan assumptions of $31 million for the three months ended March 31, 2018 . 6. The income tax effect on the pro forma adjustments, which was calculated using the federal statutory tax rate, of $7 million for the three months ended March 31, 2018 . The unaudited pro forma financial information does not reflect the potential realization of revenue synergies or cost savings, nor does it reflect other costs relating to the integration of the two companies. This unaudited pro forma financial information should not be considered indicative of the results that would have actually occurred if the acquisition had been consummated on January 1, 2017, nor are they indicative of future results.