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Consolidated Statements of Cash Flows
$ in Millions, $ in Millions
 12 Months Ended
Dec. 31, 2024
TWD ($)
Dec. 31, 2024
USD ($)
Dec. 31, 2023
TWD ($)
Dec. 31, 2022
TWD ($)
CASH FLOWS FROM OPERATING ACTIVITIES        
Income before income tax $ 47,841 $ 1,459 $ 47,008 $ 47,204
Adjustments for:        
Depreciation 32,920 1,004 32,956 32,786
Amortization 6,699 204 6,699 6,643
Amortization of incremental costs of obtaining contracts 906 28 856 841
Expected credit loss 188 6 152 117
Valuation loss on financial assets and liabilities at fair value through profit or loss, net 147 4 98 206
Interest expense 339 10 319 263
Interest income (781) (24) (618) (249)
Dividend income (240) (7) (167) (157)
Compensation cost of share-based payment transactions 8 0 8 16
Share of profits of associates and joint ventures accounted for using equity method (157) (5) (253) (442)
Loss on disposal of property, plant and equipment 17 1 0 5
Gain on disposal of investment properties (1) 0 0 (1)
Loss (gain) on disposal of investments accounted for using equity method (85) (3) (6) 14
Provision for impairment loss and obsolescence of inventory 60 2 23 34
Impairment loss on property, plant and equipment 0 0 299 0
Reversal of impairment loss / (impairment loss) on investment properties (139) (4) 336 (107)
Impairment loss on intangible assets 0 0 0 9
Others (69) (2) (60) 254
Changes in operating assets and liabilities:        
Contract assets (2,249) (69) (1,291) (1,031)
Trade notes and accounts receivable (1,322) (40) (287) (785)
Receivables from related parties (115) (4) (3) (34)
Inventories (626) (19) (178) (23)
Prepayments (29) (1) (315) 2
Other current monetary assets 64 2 107 (165)
Other current assets (293) (9) 733 (576)
Incremental cost of obtaining contracts (1,317) (40) (1,026) (833)
Contract liabilities 2,194 67 584 1,990
Trade notes and accounts payable 3,347 102 (2,033) (1,631)
Payables to related parties 95 3 (154) 147
Other payables 1,540 47 562 782
Provisions 153 5 373 (28)
Other current liabilities 78 3 (14) 60
Net defined benefit plans (657) (20) (728) (724)
Cash generated from operations 88,516 2,700 83,980 84,587
Interests paid (333) (10) (314) (239)
Income taxes paid (8,939) (273) (9,107) (8,397)
Net cash provided by operating activities 79,244 2,417 74,559 75,951
CASH FLOWS FROM INVESTING ACTIVITIES        
Acquisition of financial assets at fair value through other comprehensive income (313) (9) (305) (19)
Proceeds from disposal of financial assets at fair value through other comprehensive income 0 0 0 0
Proceeds from capital reduction of financial assets at fair value through other comprehensive income 112 4 0 7
Acquisition of financial assets at amortized cost (2,000) (61) 0 0
Acquisition of financial assets at fair value through profit or loss (162) (5) (133) (360)
Proceeds from disposal of financial assets at fair value through profit or loss 5 0 0 15
Acquisition of investments accounted for using equity method (776) (23) (1,555) (52)
Proceeds from capital reduction of investments accounted for using equity method 0 0 0 340
Acquisition of property, plant and equipment (28,756) (877) (30,741) (31,535)
Proceeds from disposal of property, plant and equipment 13 0 19 16
Acquisition of intangible assets (234) (7) (237) (1,893)
Acquisition of investment properties (4) 0 (54) (18)
Acquisition of time deposits, negotiable certificates of deposit and commercial paper with maturities of more than three months (72,915) (2,224) (45,239) (5,670)
Proceeds from disposal of time deposits, negotiable certificates of deposit with maturities of more than three months 69,886 2,131 28,577 7,310
Decrease (increase) in other noncurrent assets (258) (8) 166 235
Increase in prepayments for leases (1,400) (43) (1,729) 0
Interests received 764 23 568 219
Dividends received 663 20 467 550
Proceeds from capital reduction and profit distribution of financial assets at fair value through profit or loss 43 1 22 66
Net cash used in investing activities (35,332) (1,078) (50,174) (30,789)
CASH FLOWS FROM FINANCING ACTIVITIES        
Proceeds from short-term loans 700 21 2,590 1,292
Repayments of short-term loans (1,070) (33) (2,727) (635)
Proceeds from long-term loans 35 1 0 0
Increase (decrease) in customers' deposits (9) 0 134 (223)
Proceeds from issuance of bonds 0 0 0 3,500
Payments for transaction costs attributable to the issuance of bonds 0 0 0 (4)
Payments for the principal of lease liabilities (3,944) (120) (3,884) (3,777)
Increase in other noncurrent liabilities 282 9 680 1,644
Cash dividends paid (36,910) (1,126) (36,476) (35,746)
Acquisition of additional interests in subsidiaries 0 0 0 0
Partial disposal of interests in subsidiaries without losing control 259 8 0 0
Cash dividends distributed to noncontrolling interests (898) (27) (1,092) (1,053)
Change in other noncontrolling interests 37 1 43 200
Unclaimed dividend 2 0 2 2
Net cash used in financing activities (41,516) (1,266) (40,730) (34,800)
EFFECT OF EXCHANGE RATE CHANGES ON CASH AND CASH EQUIVALENTS 40 1 (24) 52
NET INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS 2,436 74 (16,369) 10,414
CASH AND CASH EQUIVALENTS, BEGINNING OF THE YEAR 33,824 1,032 50,193 39,779
CASH AND CASH EQUIVALENTS, END OF THE YEAR $ 36,260 $ 1,106 $ 33,824 $ 50,193