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Consolidated Statements of Changes in Equity - KRW (₩)
₩ in Millions
Total
Share capital [member]
Share premium [member]
Retained earnings [member]
Accumulated other comprehensive income [member]
Other components of equity [member]
Total attributable to owners of the Controlling Company [member]
Non-controlling interest [member]
Beginning balance (Adjusted [member]) at Dec. 31, 2017 ₩ 14,232,276 ₩ 1,564,499 ₩ 1,440,258 ₩ 10,915,203 ₩ 48,726 ₩ (1,205,302) ₩ 12,763,384 ₩ 1,468,892
Beginning balance at Dec. 31, 2017 13,183,354 1,564,499 1,440,258 9,961,150 30,985 (1,205,302) 11,791,590 1,391,764
Changes in value of available-for-sale financial assets | Increase (decrease) due to changes in accounting policy required by IFRSs [member] 1,048,922     954,053 17,741   971,794 77,128
Comprehensive income                
Profit for the year 719,412     645,571     645,571 73,841
Remeasurements of net defined benefit liabilities (73,511)     (61,449)     (61,449) (12,062)
Share of gain on remeasurements of associates and joint ventures (816)     (816)     (816)  
Share of other comprehensive income of associates and joint ventures (41)       (136)   (136) 95
Valuation gains (losses) on cashflow hedge (27,011)       (27,011)   (27,011)  
Gain(loss) on disposal of equity instruments at fair value through other comprehensive income       4,441 (4,441)      
Gain on valuation of financial instruments at fair value through other comprehensive income 43,811       30,731   30,731 13,080
Exchange differences on translation of foreign operations 2,940       2,289   2,289 651
Total comprehensive income for the year 664,784     587,747 1,432   589,179 75,605
Transactions with equity holders                
Dividends paid by the Controlling Company (245,097)     (245,097)     (245,097)  
Dividends paid to non-controlling interest of subsidiaries (53,535)             (53,535)
Changes in consolidation scope (1,701)         (1,803) (1,803) 102
Changes in ownership interest in subsidiaries 48,589         11,118 11,118 37,471
Appropriation of loss on disposal of treasury stock       (2,046)   2,046    
Disposal of treasury stock 9,547         9,547 9,547  
Others 3,627     262   3,311 3,573 54
Subtotal (238,570)     (246,881)   24,219 (222,662) (15,908)
Ending balance (Adjusted [member]) at Dec. 31, 2018 14,654,600 1,564,499 1,440,258 11,252,179 50,158 (1,181,083) 13,126,011 1,528,589
Ending balance at Dec. 31, 2018 14,658,490 1,564,499 1,440,258 11,256,069 50,158 (1,181,083) 13,129,901 1,528,589
Changes in value of available-for-sale financial assets | Increase (decrease) due to changes in accounting policy required by IFRSs [member] (3,890)     (3,890)     (3,890)  
Comprehensive income                
Profit for the year 695,868     645,703     645,703 50,165
Remeasurements of net defined benefit liabilities (25,777)     (22,774)     (22,774) (3,003)
Share of gain on remeasurements of associates and joint ventures 649     636     636 13
Share of other comprehensive income of associates and joint ventures 2,517       2,427   2,427 90
Valuation gains (losses) on cashflow hedge 22,864       22,850   22,850 14
Gain on valuation of financial instruments at fair value through other comprehensive income 167,152       114,869   114,869 52,283
Exchange differences on translation of foreign operations 4,933       4,630   4,630 303
Total comprehensive income for the year 868,206     623,565 144,776   768,341 99,865
Transactions with equity holders                
Dividends paid by the Controlling Company (269,659)     (269,659)     (269,659)  
Dividends paid to non-controlling interest of subsidiaries (35,500)             (35,500)
Changes in consolidation scope 1,539         (245) (245) 1,784
Changes in ownership interest in subsidiaries (83,660)         (9,082) (9,082) (74,578)
Appropriation of loss on disposal of treasury stock       (15,169)   15,169    
Disposal of treasury stock 3,346         3,346 3,346  
Others 1,812         1,812 1,812  
Subtotal (382,122)     (284,828)   11,000 (273,828) (108,294)
Ending balance at Dec. 31, 2019 15,140,684 1,564,499 1,440,258 11,590,916 194,934 (1,170,083) 13,620,524 1,520,160
Comprehensive income                
Profit for the year 746,256     700,889     700,889 45,367
Remeasurements of net defined benefit liabilities (60,181)     (49,554)     (49,554) (10,627)
Share of gain on remeasurements of associates and joint ventures 786     410     410 376
Share of other comprehensive income of associates and joint ventures 15,932       14,701   14,701 1,231
Valuation gains (losses) on cashflow hedge 27,387       27,433   27,433 (46)
Gain on valuation of financial instruments at fair value through other comprehensive income 41,997     184,215 (150,135)   34,080 7,917
Exchange differences on translation of foreign operations (2,666)       (882)   (882) (1,784)
Total comprehensive income for the year 769,511     835,960 (108,883)   727,077 42,434
Transactions with equity holders                
Dividends paid by the Controlling Company (269,766)     (269,766)     (269,766)  
Dividends paid to non-controlling interest of subsidiaries (40,802)             (40,802)
Changes in ownership interest in subsidiaries 29,825         11,628 11,628 18,197
Appropriation of loss on disposal of treasury stock       (1,690)   1,690    
Acquisition of treasury stock (110,097)         (110,097) (110,097)  
Disposal of treasury stock 33,213         33,213 33,213  
Others (1,135)         (1,135) (1,135)  
Subtotal (358,762)     (271,456)   (64,701) (336,157) (22,605)
Ending balance at Dec. 31, 2020 ₩ 15,551,433 ₩ 1,564,499 ₩ 1,440,258 ₩ 12,155,420 ₩ 86,051 ₩ (1,234,784) ₩ 14,011,444 ₩ 1,539,989