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CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Millions, $ in Millions | 12 Months Ended
--- | ---
Mar. 31, 2018 | Mar. 31, 2017 | Mar. 31, 2016
Revenues | $ 208,357 | $ 198,533 | $ 190,884
Cost of Sales | (197,173) | (187,262) | (179,468)
Gross Profit | 11,184 | 11,271 | 11,416
Operating Expenses |  |  |
Selling, distribution and administrative expenses | (8,138) | (7,460) | (7,379)
Research and development | (125) | (341) | (392)
Goodwill impairment charges | (1,738) | (290) | 0
Restructuring and asset impairment charges | (567) | (18) | (203)
Total Operating Expenses | (10,422) | (4,162) | (7,871)
Operating Income | 762 | 7,109 | 3,545
Other Income, Net | 130 | 90 | 58
Loss on Debt Extinguishment | (122) | 0 | 0
Interest Expense | (283) | (308) | (353)
Income from Continuing Operations Before Income Taxes | 239 | 6,891 | 3,250
Income Tax Benefit (Expense) | 53 | (1,614) | (908)
Income from Continuing Operations | 292 | 5,277 | 2,342
Income (Loss) from Discontinued Operations, Net of Tax | 5 | (124) | (32)
Net Income | 297 | 5,153 | 2,310
Net Income Attributable to Noncontrolling Interests | (230) | (83) | (52)
Net Income Attributable to McKesson Corporation | $ 67 | $ 5,070 | $ 2,258
Diluted |  |  |
Continuing operations (in dollars per share) | $ 0.30 | $ 23.28 | $ 9.84
Discontinued operations (in dollars per share) | 0.02 | (0.55) | (0.14)
Total (in dollars per share) | 0.32 | 22.73 | 9.70
Basic |  |  |
Continuing operations (in dollars per share) | 0.30 | 23.50 | 9.96
Discontinued operations (in dollars per share) | 0.02 | (0.55) | (0.14)
Total (in dollars per share) | $ 0.32 | $ 22.95 | $ 9.82
Weighted Average Common Shares |  |  |
Diluted (in shares) | 209 | 223 | 233
Basic (in shares) | 208 | 221 | 230
EIS, Zee Medical and Nurse Triage Businesses |  |  |
Operating Expenses |  |  |
Gains from sales of businesses | $ 109 | $ 0 | $ 103
Healthcare Technology Net Asset Exchange |  |  |
Operating Expenses |  |  |
Gains from sales of businesses | 37 | 3,947 | 0
Change Healthcare |  |  |
Operating Expenses |  |  |
Loss from Equity Method Investment in Change Healthcare | $ (248) | $ 0 | $ 0

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- Definition The aggregate costs incurred (1) in a planned search or critical investigation aimed at discovery of new knowledge with the hope that such knowledge will be useful in developing a new product or service, a new process or technique, or in bringing about a significant improvement to an existing product or process; or (2) to translate research findings or other knowledge into a plan or design for a new product or process or for a significant improvement to an existing product or process whether intended for sale or the entity's use, during the reporting period charged to research and development projects, including the costs of developing computer software up to the point in time of achieving technological feasibility, and costs allocated in accounting for a business combination to in-process projects deemed to have no alternative future use. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 730 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6420194&loc=d3e21568-108373 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 985 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6501960&loc=d3e128462-111756 + Details
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