XML 184 R152.htm IDEA: XBRL DOCUMENT v3.20.1
Cash Flow Information - Schedule of Detailed Information about Non Cash Transaction (Detail)
$ in Millions, $ in Millions
 12 Months Ended
Dec. 31, 2019
TWD ($)
Dec. 31, 2019
USD ($)
Dec. 31, 2018
TWD ($)
Dec. 31, 2017
TWD ($)
Disclosure of detailed information about non-cash transaction [line items]        
Additions of property, plant and equipment $ 564,283.0   $ 300,024.4 $ 322,493.9
Changes in other financial assets 472.5   1,555.4 3,634.9
Exchange of assets (3,287.1)      
Changes in payables to contractors and equipment suppliers (100,963.9)   13,979.9 4,364.5
Transferred to initial carrying amount of hedged items (82.3)   22.2 94.9
Payments for acquisition of property, plant and equipment 460,422.2 $ 15,393.6 315,581.9 330,588.2
Acquisition of available-for-sale financial assets       101,824.0
Changes in accrued expenses and other current liabilities       (2,262.8)
Proceeds from disposal of available-for-sale financial assets       69,538.9
Disposal of available-for-sale financial assets       70,862.9
Payments for acquisition of financial assets at FVTOCI 257,558.2 $ 8,611.1 96,412.8  
Payments for acquisition of available-for-sale financial assets       101,824.0
Financial assets available-for-sale, category [member]        
Disclosure of detailed information about non-cash transaction [line items]        
Changes in other financial assets       (1,324.0)
Acquisition of available-for-sale financial assets       $ 104,086.8
Financial assets measured at fair value through other comprehensive income, category [member]        
Disclosure of detailed information about non-cash transaction [line items]        
Changes in other financial assets (266.3)   (4,323.0)  
Acquisition of financial assets at FVTOCI 257,824.5   100,759.6  
Changes in accrued expenses and other current liabilities     (23.8)  
Disposal of financial assets at FVTOCI 229,525.1   90,545.1  
Proceeds from disposal of financial assets at FVTOCI 230,444.5   86,639.3  
Payments for acquisition of financial assets at FVTOCI 257,558.2   96,412.8  
Changes in other financial assets $ 919.4   $ (3,905.8)