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Consolidated Statement of Changes in Equity
₨ in Millions, $ in Millions
INR (₨)
USD ($)
Share capital, fully paid-up [member]
INR (₨)
shares
Share capital, fully paid-up [member]
USD ($)
shares
Share premium [member]
INR (₨)
Share premium [member]
USD ($)
Retained earnings [member]
INR (₨)
Retained earnings [member]
USD ($)
Share based payment reserve [member]
INR (₨)
Share based payment reserve [member]
USD ($)
Foreign currency translation reserve [member]
INR (₨)
Foreign currency translation reserve [member]
USD ($)
 [1],[2]
Cash flow hedging reserves [member]
INR (₨)
Cash flow hedging reserves [member]
USD ($)
Other reserves [member]
INR (₨)
Other reserves [member]
USD ($)
Equity attributable to the equity holders of the Company [member]
INR (₨)
Equity attributable to the equity holders of the Company [member]
USD ($)
Non- controlling interest [member]
INR (₨)
Non- controlling interest [member]
USD ($)
Balance at the beginning of the year at Mar. 31, 2015 ₨ 408,815   ₨ 4,937   ₨ 14,031   ₨ 371,478   ₨ 1,312   ₨ 11,249   ₨ 3,550   ₨ 624   ₨ 407,181   ₨ 1,634  
Beginning balance, shares at Mar. 31, 2015 | shares [1]     2,469,043,038 2,469,043,038                                
Total comprehensive income for the year                                        
Profit for the year 89,567           89,075                   89,075   492  
Other comprehensive income 2,905                   4,867   (1,640)   (408)   2,819   86  
Total comprehensive income for the year 92,472           89,075       4,867   (1,640)   (408)   91,894   578  
Contributions by and distributions to owners of the Company                                        
Cash dividend paid (including dividend tax thereon) (35,494)           (35,494)                   (35,494)      
Issue of equity shares on exercise of options 4   ₨ 4   611       (611)               4      
Issue of equity shares on exercise of options, shares | shares [1]     1,670,252 1,670,252                                
Compensation cost related to employee share based payment 1,587           59   1,528               1,587      
Total transactions with owners of the Company (33,903)   ₨ 4   611   (35,435)   917               (33,903)      
Total transactions with owners of the Company, shares | shares [1]     1,670,252 1,670,252                                
Balance at the end of the year at Mar. 31, 2016 467,384   ₨ 4,941   14,642   425,118   2,229   16,116   1,910   216   465,172   2,212  
Ending balance, shares at Mar. 31, 2016 | shares [1]     2,470,713,290 2,470,713,290                                
Total comprehensive income for the year                                        
Profit for the year 85,143           84,895                   84,895   248  
Other comprehensive income 2,098                   (3,009)   3,996   1,180   2,167   (69)  
Total comprehensive income for the year 87,241           84,895       (3,009)   3,996   1,180   87,062   179  
Contributions by and distributions to owners of the Company                                        
Cash dividend paid (including dividend tax thereon) (8,734)           (8,734)                   (8,734)      
Issue of equity shares on exercise of options         81       (81)                      
Issue of equity shares on exercise of options, shares | shares [1]     187,275 187,275                                
Issue of shares by controlled trust on exercise of options             384   (384)                      
Buyback of equity shares (25,000)   ₨ (80)   (14,254)   (10,746)               80   (25,000)      
Buyback of equity shares, shares | shares [1]     (40,000,000) (40,000,000)                                
Compensation cost related to employee share based payment 1,804           13   1,791               1,804      
Total transactions with owners of the Company (31,930)   ₨ (80)   (14,173)   (19,083)   1,326           80   (31,930)      
Total transactions with owners of the Company, shares | shares [1]     (39,812,725) (39,812,725)                                
Balance at the end of the year at Mar. 31, 2017 522,695   ₨ 4,861   469   490,930   3,555   13,107 [2]   5,906   1,476   520,304   2,391  
Ending balance, shares at Mar. 31, 2017 | shares [1]     2,430,900,565 2,430,900,565                                
Total comprehensive income for the year                                        
Profit for the year 80,084 $ 1,230         80,081                   80,081   3  
Other comprehensive income (3,109) (48)                 3,511 [2]   (6,020)   (616)   (3,125)   16  
Total comprehensive income for the year 76,975 1,182         80,081       3,511 [2]   (6,020)   (616)   76,956   19  
Contributions by and distributions to owners of the Company                                        
Cash dividend paid (including dividend tax thereon) (5,420)           (5,420)                   (5,420)      
Issue of equity shares on exercise of options 24   ₨ 8   1,987       (1,971)               24      
Issue of equity shares on exercise of options, shares | shares [1]     3,559,599 3,559,599                                
Issue of shares by controlled trust on exercise of options             1,182   (1,182)                      
Buyback of equity shares [3] (110,000)   ₨ (687)   (1,656)   (108,344)               687   (110,000)      
Buyback of equity shares, shares | shares [1],[3]     (343,750,000) (343,750,000)                                
Transaction cost related to buyback (312)           (312)                   (312)      
Bonus issue of equity shares     ₨ 4,866       (4,866)                          
Bonus issue of equity shares, shares | shares [1]     2,433,074,327 2,433,074,327                                
Compensation cost related to employee share based payment 1,384           14   1,370               1,384      
Total transactions with owners of the Company (114,324)   ₨ 4,187   331   (117,746)   (1,783)           687   (114,324)      
Total transactions with owners of the Company, shares | shares [1]     2,092,883,926 2,092,883,926                                
Balance at the end of the year at Mar. 31, 2018 ₨ 485,346 $ 7,454 ₨ 9,048 $ 139 ₨ 800 $ 12 ₨ 453,265 $ 6,962 ₨ 1,772 $ 27 ₨ 16,618 [2] $ 255 ₨ (114) $ (2) ₨ 1,547 $ 24 ₨ 482,936 $ 7,417 ₨ 2,410 $ 37
Ending balance, shares at Mar. 31, 2018 | shares [1]     4,523,784,491 4,523,784,491                                
[1] Includes 14,829,824, 13,728,607 and 23,097,216 treasury shares held as of March 31, 2016, 2017 and 2018, respectively, by a controlled trust. 4,351,775 shares have been transferred by the controlled trust to eligible employees on exercise of options during the year ended March 31, 2018.
[2] Foreign currency translation reserve includes ₹2,907 directly associated with assets held for sale.
[3] Refer Note 18.