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Segment Information (Tables)
12 Months Ended
Dec. 31, 2020
Segment Reporting [Abstract]  
Summarized financial information
Summarized financial information is shown in the following tables. Consistent accounting policies have been applied by all segments within the Company, for all reporting periods.
Segment revenue202020192018
Oilfield Services$10,140 $12,889 $11,617 
Oilfield Equipment2,844 2,921 2,641 
Turbomachinery & Process Solutions5,705 5,536 6,015 
Digital Solutions2,015 2,492 2,604 
Total$20,705 $23,838 $22,877 
    The performance of our operating segments is evaluated based on segment operating income (loss), which is defined as income (loss) before income taxes and equity in loss of affiliate and before the following: net interest expense, net other non-operating income (loss), corporate expenses, restructuring, impairment and other charges, inventory impairments, separation and merger related costs, goodwill impairment and certain gains and losses not allocated to the operating segments.

Segment income (loss) before income taxes202020192018
Oilfield Services$487 $917 $785 
Oilfield Equipment19 55 — 
Turbomachinery & Process Solutions805 719 621 
Digital Solutions193 343 390 
Total segment1,504 2,035 1,796 
Corporate(464)(433)(405)
Inventory impairment and related charges (1)
(246)— (105)
Goodwill impairment(14,773)— — 
Restructuring, impairment and other(1,866)(342)(433)
Separation and merger related(134)(184)(153)
Other non-operating income (loss), net1,040 (84)202 
Interest expense, net(264)(237)(223)
Total$(15,202)$753 $680 
(1)Inventory impairments and related charges are reported in "Cost of goods sold" of the consolidated statements of income (loss).
Schedule of assets, depreciation, amortization and capital expenditures by segment
The following table presents total assets by segment at December 31:
Segment assets20202019
Oilfield Services$15,482 $30,611 
Oilfield Equipment3,344 7,645 
Turbomachinery & Process Solutions8,951 8,365 
Digital Solutions3,948 3,983 
Total segment31,725 50,604 
Corporate and eliminations (1)
6,282 2,765 
Total $38,007 $53,369 
(1)The assets in Corporate and eliminations consist primarily of cash, the Baker Hughes trade name, our investment in C3.ai, certain facilities, and certain other noncurrent assets. It also includes adjustments to eliminate intercompany investments and receivables reflected within the total assets of each of our reportable segments.
The following table presents depreciation and amortization by segment:
Segment depreciation and amortization202020192018
Oilfield Services$926 $985 $1,003 
Oilfield Equipment146 175 173 
Turbomachinery & Process Solutions
118 116 156 
Digital Solutions
98 103 112 
Total Segment1,288 1,379 1,444 
Corporate29 39 42 
Total$1,317 $1,418 $1,486 
Schedule of revenues and property, plant and equipment, net
The following table presents net property, plant and equipment by its geographic location at December 31:
Property, plant and equipment - net202020192018
U.S.$2,007 $2,594 $2,654 
Non-U.S.3,351 3,646 3,574 
Total$5,358 $6,240 $6,228