Segment Information Our reportable segments are i) general rentals and ii) trench, power and fluid solutions. The general rentals segment includes the rental of i) general construction and industrial equipment, such as backhoes, skid-steer loaders, forklifts, earthmoving equipment and material handling equipment, ii) aerial work platforms, such as boom lifts and scissor lifts and iii) general tools and light equipment, such as pressure washers, water pumps and power tools. The general rentals segment reflects the aggregation of 11 geographic regionsCarolinas, Gulf South, Industrial (which serves the geographic Gulf region and has a strong industrial presence), Mid-Atlantic, Mid Central, Midwest, Northeast, Pacific West, South, Southeast and Western Canadaand operates throughout the United States and Canada. The trench, power and fluid solutions segment includes the rental of specialty construction products such as i) trench safety equipment, such as trench shields, aluminum hydraulic shoring systems, slide rails, crossing plates, construction lasers and line testing equipment for underground work, ii) power and HVAC equipment, such as portable diesel generators, electrical distribution equipment, and temperature control equipment and iii) fluid solutions equipment primarily used for fluid containment, transfer and treatment. The trench, power and fluid solutions segment is comprised of the following regions, each of which primarily rents the corresponding equipment type described above: i) the Trench Safety region, ii) the Power and HVAC region, iii) the Fluid Solutions region and iv) the Fluid Solutions Europe region. The trench, power and fluid solutions segments customers include construction companies involved in infrastructure projects, municipalities and industrial companies. This segment operates throughout the United States and in Canada and Europe. These segments align our external segment reporting with how management evaluates and allocates resources. We evaluate segment performance based on segment equipment rentals gross profit. The following tables set forth financial information by segment. General rentals Trench, power and fluid solutions Total Three Months Ended March 31, 2019 Equipment rentals $ 1,423 $ 372 $ 1,795 Sales of rental equipment 178 14 192 Sales of new equipment 55 7 62 Contractor supplies sales 17 7 24 Service and other revenues 37 7 44 Total revenue 1,710 407 2,117 Depreciation and amortization expense 412 87 499 Equipment rentals gross profit 501 157 658 Capital expenditures 236 63 299 Three Months Ended March 31, 2018 Equipment rentals $ 1,201 $ 258 $ 1,459 Sales of rental equipment 171 10 181 Sales of new equipment 37 5 42 Contractor supplies sales 14 4 18 Service and other revenues 30 4 34 Total revenue 1,453 281 1,734 Depreciation and amortization expense 337 56 393 Equipment rentals gross profit 426 119 545 Capital expenditures 267 46 313 March 31, 2019 December 31, 2018 Total reportable segment assets General rentals $ 15,750 $ 15,597 Trench, power and fluid solutions 2,836 2,536 Total assets $ 18,586 $ 18,133 Equipment rentals gross profit is the primary measure management reviews to make operating decisions and assess segment performance. The following is a reconciliation of equipment rentals gross profit to income before provision for income taxes: Three Months Ended March 31, 2019 2018 Total equipment rentals gross profit $ 658 $ 545 Gross profit from other lines of business 103 101 Selling, general and administrative expenses (280 ) (232 ) Merger related costs (1 ) (1 ) Restructuring charge (8 ) (2 ) Non-rental depreciation and amortization (104 ) (71 ) Interest expense, net (151 ) (109 ) Other income, net 3 1 Income before provision for income taxes $ 220 $ 232