## Table 0 ##
(1) Inventory impairments and related charges are reported in the "Cost of goods sold" caption of the consolidated and combined statements of income (loss).2017 includes $87 million of adjustments to write-up the acquired inventory to its estimated fair value on acquisition of Baker Hughes as this inventory was used or sold in the six months ended December 31, 2017.
Fiscal Year 2017 to Fiscal Year 2016 Revenue in 2017 was $17,259 million, an increase of $3,990 million, or 30%, from 2016.
This increase was primarily driven by the acquisition of Baker Hughes.
OFS increased $5,052 million, DS increased $223 million, OFE decreased $910 million, and TPS decreased $374 million.
Total segment operating income in 2017 was $1,295 million, a decrease of $431 million, or 25%, from 2016.
The acquisition of Baker Hughes added $309 million of segment operating income, but was more than offset by the organic impact of lower productivity and pricing pressure.
OFS increased $275 million, TPS decreased $402 million, OFE decreased $282 million and DS decreased $22 million.
Oilfield Services OFS 2017 revenue was $5,851 million, an increase of $5,052 million from 2016, primarily as a result of the acquisition of Baker Hughes on July 3, 2017.
OFS 2017 segment operating income was $71 million, compared to a loss of $204 million in 2016.
The acquisition of Baker Hughes added $315 million of segment operating income, which includes increased depreciation & amortization expense driven by purchase accounting, partially offset by pricing pressure.
Oilfield Equipment OFE 2017 revenue was $2,637 million, a decrease of $910 million, or 26%, from 2016.
The revenue decline was primarily due to continued volume pressures and to a lesser extent to negative pricing, driven by the delays in final investment decisions by our customers in prior years.
LIQUIDITY AND CAPITAL RESOURCES Our objective in financing our business is to maintain sufficient liquidity, adequate financial resources and financial flexibility in order to fund the requirements of our business.
At December 31, 2017, we had cash and equivalents of $7.0 billion compared to $981 million of cash and equivalents at December 31, 2016.
Cash and equivalents includes $997 million of cash held on behalf of GE at December 31, 2017.
At December 31, 2017, approximately $3.2 billion of our cash and equivalents was held by foreign subsidiaries compared to approximately $878 million at December 31, 2016.
A substantial portion of the cash held by foreign subsidiaries at December 31, 2017 has been reinvested in active non-U.
S.  business operations.
At December 31, 2017, our intent is, among other things, to use this cash to fund the operations of our foreign subsidiaries, and we have not changed our indefinite reinvestment decision as a result of U. S.  tax reform but will reassess this during the course of 2018.
If we decide at a later date to repatriate those funds to the U. S. , we may be required to provide taxes on certain of those funds, however, due to the enactment of U. S.  tax reform, repatriations of foreign earnings will generally be free of U. S.  federal tax but may incur other taxes such as withholding or state taxes.
On July 3, 2017, in connection with the Transactions, BHGE LLC entered into a new five-year $3 billion committed unsecured revolving credit facility (2017 Credit Agreement) with commercial banks maturing in July 2022.
As of December 31, 2017, there were no borrowings under the 2017 Credit Agreement.
On November 3, 2017, BHGE LLC entered into a commercial paper program under which it may issue from time to time up to $3 billion in commercial paper with maturities of no more than 397 days.
At December 31, 2017, there were no borrowings outstanding under the commercial paper program.
The maximum combined borrowing at any time under both the 2017 Credit Agreement and the commercial paper program is $3 billion.
On November 6, 2017, we announced that our board of directors authorized BHGE LLC to repurchase up to $3 billion of its common units from the Company and GE.
The proceeds of such repurchase that are distributed to the Company will be used to repurchase Class A shares of the Company on the open market or in privately negotiated transactions.
On December 15, 2017, we filed a shelf registration statement on Form S-3 with the SEC to give us the ability to sell up to $3 billion in debt securities in amounts to be determined at the time of an offering.
Any such offering, if it does occur, may happen in one or more transactions.
The specific terms of any securities to be sold will be described in supplemental filings with the SEC.
The registration statement will expire in 2020.
During the year ended December 31, 2017, we used cash to fund a variety of activities including certain working capital needs and restructuring costs, capital expenditures, business acquisitions, the payment of dividends and share repurchases.
We believe that cash on hand, cash flows generated from operations and the available credit facility will provide sufficient liquidity to manage our global cash needs.
Cash Flows Cash flows provided by (used in) each type of activity were as follows for the years ended December 31:
## Table 1 ##
Operating Activities Our largest source of operating cash is payments from customers, of which the largest component is collecting cash related to product or services sales including advance payments or progress collections for work to be performed.
The primary use of operating cash is to pay our suppliers, employees, tax authorities and others for a wide range of material and services.
in inspection of pipelines in Iran.
This non-U.
S.  affiliate did not recognize any revenue or profit during the quarter ending December 31, 2017.
All of these non-U.
S.  affiliates intend to continue the activities described above, as permitted by all applicable laws and regulations.
FORWARD-LOOKING STATEMENTS This Form 10-K, including MD&A and certain statements in the Notes to Consolidated and Combined Financial Statements, contains forward-looking statements within the meaning of Section 27A of the Securities Act of 1933, as amended, and Section 21E of the Exchange Act of 1934, as amended, (each a "forward-looking statement").
Forward-looking statements concern future circumstances and results and other statements that are not historical facts and are sometimes identified by the words "may," "will," "should," "potential," "intend," "expect," "endeavor," "seek," "anticipate," "estimate," "overestimate," "underestimate," "believe," "could," "project," "predict," "continue," "target" or other similar words or expressions.
Forward-looking statements are based upon current plans, estimates and expectations that are subject to risks, uncertainties and assumptions.
Should one or more of these risks or uncertainties materialize, or should underlying assumptions prove incorrect, actual results may vary materially from those indicated or anticipated by such forward-looking statements.
The inclusion of such statements should not be regarded as a representation that such plans, estimates or expectations will be achieved.
Important factors that could cause actual results to differ materially from such plans, estimates or expectations include, among others, the risk factors in the "Risk Factors" section of Part 1 of Item 1A of this Form 10-K and those set forth from time-to-time in other filings by the Company with the SEC.
These documents are available through our website or through the SEC's Electronic Data Gathering and Analysis Retrieval (EDGAR) system at http://www.
sec.
gov.
In light of such risks and uncertainties, we caution you not to place undue reliance on these forward-looking statements.
These forward-looking statements speak only as of the date of this annual report, or if earlier, as of the date they were made.
We do not intend to, and disclaim any obligation to, update or revise any forward-looking statements unless required by securities law.
ITEM 7A.
QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT MARKET RISK We are exposed to certain market risks that are inherent in our financial instruments and arise from changes in interest rates and foreign currency exchange rates.
We may enter into derivative financial instrument transactions to manage or reduce market risk but do not enter into derivative financial instrument transactions for speculative purposes.
A discussion of our primary market risk exposure in financial instruments is presented below.
INTEREST RATE RISK The majority of our debt is comprised of fixed rate instruments.
We are subject to interest rate risk on our debt and investment portfolio.
We may use interest rate swaps to manage the economic effect of fixed rate obligations associated with certain debt.
There were no outstanding interest rate swap agreements as of December 31, 2017.
The following table sets forth our fixed rate long-term debt, excluding capital leases, and the related weighted average interest rates by expected maturity dates.
## Table 2 ##
(1) Fair market value of our fixed rate long-term debt, excluding capital leases, was $7.0 billion at December 31, 2017.
(2) Amounts represent the principal value of our long-term debt outstanding and related weighted average interest rates at the end of the respective period.

Tables referenced above, in order (Table 0 first):
<table><tr><td></td><td colspan="3">Year Ended December 31,</td><td colspan="2">$ Change</td></tr><tr><td></td><td>2017</td><td>2016</td><td>2015</td><td>From 2016 to 2017</td><td>From 2015 to 2016</td></tr><tr><td>Segment operating income (loss):</td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Oilfield Services</td><td>$71</td><td>$-204</td><td>$-79</td><td>$275</td><td>$-125</td></tr><tr><td>Oilfield Equipment</td><td>38</td><td>320</td><td>677</td><td>-282</td><td>-357</td></tr><tr><td>Turbomachinery & Process Solutions</td><td>853</td><td>1,255</td><td>1,684</td><td>-402</td><td>-429</td></tr><tr><td>Digital Solutions</td><td>333</td><td>355</td><td>409</td><td>-22</td><td>-54</td></tr><tr><td>Total segment operating income (loss)</td><td>1,295</td><td>1,726</td><td>2,691</td><td>-431</td><td>-965</td></tr><tr><td>Corporate</td><td>-373</td><td>-380</td><td>-260</td><td>7</td><td>-120</td></tr><tr><td>Inventory impairment and related charges<sup>-1</sup></td><td>-244</td><td>-138</td><td>-51</td><td>-106</td><td>-87</td></tr><tr><td>Restructuring, impairment and other</td><td>-412</td><td>-516</td><td>-411</td><td>104</td><td>-105</td></tr><tr><td>Goodwill impairment</td><td>—</td><td>—</td><td>-2,080</td><td>—</td><td>2,080</td></tr><tr><td>Merger and related costs</td><td>-373</td><td>-33</td><td>-27</td><td>-340</td><td>-6</td></tr><tr><td>Operating income (loss)</td><td>-107</td><td>659</td><td>-138</td><td>-766</td><td>797</td></tr><tr><td>Other non operating income, net</td><td>78</td><td>27</td><td>100</td><td>51</td><td>-73</td></tr><tr><td>Interest expense, net</td><td>-131</td><td>-102</td><td>-120</td><td>-29</td><td>18</td></tr><tr><td>Income (loss) before income taxes and equity in loss of affiliate</td><td>-160</td><td>584</td><td>-158</td><td>-744</td><td>742</td></tr><tr><td>Equity in loss of affiliate</td><td>-11</td><td>—</td><td>—</td><td>-11</td><td>—</td></tr><tr><td>Provision for income taxes</td><td>-71</td><td>-250</td><td>-473</td><td>179</td><td>223</td></tr><tr><td>Net income (loss)</td><td>$-242</td><td>$334</td><td>$-631</td><td>$-576</td><td>$965</td></tr></table>
<table><tr><td>(In millions)</td><td>2017</td><td>2016</td><td>2015</td></tr><tr><td>Operating activities</td><td>$-799</td><td>$262</td><td>$1,277</td></tr><tr><td>Investing activities</td><td>-4,130</td><td>-472</td><td>-466</td></tr><tr><td>Financing activities</td><td>10,919</td><td>-102</td><td>-515</td></tr></table>
<table><tr><td>(In millions)</td><td>2018</td><td>2019</td><td>2020</td><td>2021</td><td>2022</td><td>Thereafter</td><td>Total<sup>-2</sup></td></tr><tr><td>As of December 31, 2017</td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Long-term debt<sup>-1</sup></td><td>$615</td><td>$—</td><td>$—</td><td>$513</td><td>$1,250</td><td>$4,196</td><td>$6,574</td></tr><tr><td>Weighted average interest rates</td><td>2.15%</td><td>—%</td><td>—%</td><td>2.47%</td><td>2.87%</td><td>3.88%</td><td>3.42%</td></tr></table>

Question: What's the sum of the Oilfield Services in the years where Oilfield Services is positive?
Answer: 71