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Pension Plans (Details 4) - Other post-employment benefit plans [Member] - CLP ($)
$ in Millions
 12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Statement Line Items [Line Items]      
Current period service expenses $ (567) $ (1,069) $ (2,039)
Interest cost
Expected yield from plan's assets 333 353 307
Expected yield of insurance contracts linked to the Plan:      
Extraordinary allocations
Actuarial (gain)/ losses recorded in the period
Past service cost
Other
Total $ 233 $ 716 $ 1,732