EBITDA is defined as net earnings (loss) attributable to common stockholders plus interest expense — net, income taxes and depreciation and amortization. Other adjustments include the elimination of loan fee amortization that is included in both interest and amortization, and the portion of depreciation that is included in noncontrolling interests.
The company has presented EBITDA because management uses the measure to track performance and believes that it is frequently used by securities analysts, investors and other interested parties in the evaluation of companies in the industry.
Adjusted EBITDA is defined as EBITDA adjusted with the selected items included in EBITDA as summarized in the table below. The company has presented adjusted EBITDA because management uses adjusted EBITDA, and believes it is useful to investors, as a supplemental financial measure in the comparison of year-over-year performance.
Year Ended December 31 | 2017 | 2016 |
---|---|---|
(in millions) | ||
Net earnings (loss) attributable to common stockholders | $358 | $(277) |
Interest expense—net | 303 | 195 |
Income tax benefit | (575) | (68) |
Depreciation and amortization | 883 | 678 |
Less other adjustments: | ||
Depreciation and amortization in noncontrolling interests | (101) | (78) |
Loan fee amortization(1) | (12) | (55) |
EBITDA | 856 | 395 |
Unrealized net mark-to-market loss (gain) on natural gas derivatives | 61 | (260) |
Loss on foreign currency transactions including intercompany loans(2) | 2 | 93 |
Equity method investment tax contingency accrual(3) | 7 | — |
Loss on embedded derivative(4) | 4 | 23 |
Loss on debt extinguishment | 53 | 167 |
Private Senior Notes amendment arrangement fees | — | |
Capacity expansion project expenses | — | 73 |
Expansion project start-up costs | — | 52 |
Transaction costs(5) | — | 179 |
Impairment of equity method investment in PLNL | — | 134 |
Gain on sale of equity method investment | (14) | — |
Total adjustments | 113 | 463 |
Adjusted EBITDA | $969 | $858 |
Controllable cost of sales is defined as cost of sales adjusted for natural gas costs, realized and unrealized losses (gains) on natural gas derivatives, and depreciation and amortization. The company has presented controllable cost of sales and controllable cost of sales per ton because management uses these measures, and believes they are useful to investors, as supplemental financial measures in the comparison of year-over-year performance.
Year Ended December 31 | 2017 | 2016 | 2015 |
---|---|---|---|
(in millions) | |||
Cost of sales | $3,700 | $2,845 | $2,761 |
Natural gas costs(1) | 1,194 | 761 | 746 |
Realized net losses on natural gas derivatives2 | 26 | 133 | 70 |
Unrealized net mark-to-market loss (gain) on natural gas derivatives |
61 | (260) | 176 |
Depreciation and amortization | 836 | 597 | 433 |
Expansion project start-up costs | — | 52 | — |
Total adjustments | 2,117 | 1,283 | 1,425 |
Controllable cost of sales | $1,583 | $1,562 | $1,336 |
Tons of product sold (000s) | 19,952 | 16,957 | 13,718 |
Cost of sales per ton | $185.45 | $167.78 | $201.27 |
Decrease in cost of sales per ton | (8)% | ||
Controllable cost of sales per ton | $79.34 | $92.12 | $97.39 |
Decrease in controllable cost of sales per ton | (19)% |