|Operating earnings before other expenses, net||1,724||1,727||(0.2%)|
|Controlling interest net income||543||806||(32.6%)|
|Controlling interest basic earnings per ADS2||0.36||0.53||(31.9%)|
|Controlling interest basic earnings per ADS2 from continuing operations||0.35||0.41|
|Controlling interest basic earnings per ADS2 from discontinued operations||0.01||0.12|
|Free cash flow after maintenance capital expenditures||918||1,290||(28.8%)|
|Total debt and perpetual debentures||10,397||11,349||(8.4%)|
|Total controlling stockholders' equity
(in millions of US dollars1, except per-ADS data)
1 For the reader's convenience figures are presented in US dollars. For statements of operations accounts, these figures result from translating the local currency amounts into US dollars at the average exchange rate for the year, which approximates a convenience translation of the Mexican peso results for 2018 and 2017 using the average exchange rates of the year of 19.26 and 18.88 MXN/US$, respectively. For balance sheet accounts, US dollar figures result from translating the local currency amounts into US dollars at the closing exchange rate for the year, which approximates a convenience translation of the Mexican peso amounts at the end of each year using the end-of-year exchange rate of 19.65 and 19.65 MXN/US$, respectively.
2 Based on an average of 1,543 and 1,517 million American Depositary Shares (ADSs) for 2018 and 2017, respectively.
(i) As a result of requirements by the National Banking and Exchange Commission, CEMEX prepares its consolidated financial statements using International Financial Reporting Standards (“IFRS”), as issued by the International Accounting Standards Board ("IASB").