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Consolidated statements of cash flow - MXN ($)
$ in Thousands
12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Cash flows from operating activities:      
Profit (loss) before taxes $ 1,846,311 $ (775,179) $ (301,930)
Adjustments to reconcile the profit (loss) with cash used in operating activities:      
Depreciation, amortization and loss from revaluation 562,915 555,244 672,643
Other amortizations 84,615 76,020 76,196
(Gain) loss from the sale of property, vessels and equipment, net (330) (56,491) 26,131
Accrued interests 1,039,856 783,458 714,520
Gain from the loss of control of subsidiary (3,458,467) 0 0
Exchange (gain) loss (4,545) 69,826 46,273
Loss (gain) from the sale of subsidiaries 273,032 0 (171,505)
Changes in assets and liabilities:      
Accounts receivable 7,924 267,891 (266,469)
Other accounts receivable and related parties (150,154) (54,580) (62,174)
Materials and supplies (38,936) (3,845) 16,141
Prepayments 3,753 6,403 9,230
Other accounts payable and accrued expenses 162,094 (247,901) (147,950)
Other non-current assets 42,269 36,971 (8,085)
Employee benefits 11,353 (47,035) 9,360
Total adjustments (1,464,621) 1,385,961 914,311
Cash from operating activities 381,690 610,782 612,381
Cash from investment activities      
Proceeds from sale of property, vessels and equipment 7,059 87,720 64,677
Acquisition of property, vessels and equipment (80,222) (162,072) (102,359)
Proceeds from sale of subsidiaries 66,987 0 829,836
Decrease of cash and cash equivalents from the loss of control of subsidiary (TMM DM) (212,332) 0 0
Cash (used in) from investment activities (218,508) (74,352) 792,154
Cash flow from financing activities      
Debt contracted 0 166,509 30,000
Debt payments (172,592) (173,439) (564,082)
Interest paid (409,146) (737,548) (631,680)
Cash used in financing activities (581,738) (744,478) (1,165,762)
Exchange effect on cash (22,594) 65,393 63,540
(Decrease) increase in cash and cash equivalents (441,150) (142,655) 302,313
Cash and cash equivalents, beginning of year 902,704 1,045,359 743,046
Cash and cash equivalents, end of year 461,554 902,704 1,045,359
Complementary information:      
Income tax paid $ 3,000 $ 3,433 $ 3,314