Depreciation, Amortization and Impairment Losses (Tables)

12 Months Ended

Dec. 31, 2017

Disclosure Of Depreciation Amortization And Impairment [Abstract]

Summary of Depreciation, Amortization and Impairment losses

The detail of depreciation, amortization and impairment losses for the years ended December 31, 2017, 2016 and 2015, are as follows:

	For the years ended December 31,
	2017			2016			2015
	ThCh$			ThCh$			ThCh$
Depreciation		(145,873,065	)		(155,826,620	)		(148,421,514	)
Amortization		(6,811,041	)		(5,833,990	)		(4,780,148	)
Subtotal		(152,684,106	)		(161,660,610	)		(153,201,662	)
Impairment (Losses) Reversals (*)		(7,937,817	)		(35,926,710	)		3,054,903
Total		(160,621,923	)		(197,587,320	)		(150,146,759	)

	Balance as of
(*) Impairment Losses	Generation								Distribution									Total
	2017		2016			2015			2017			2016			2015			2017			2016			2015
	ThCh$		ThCh$			ThCh$			ThCh$			ThCh$			ThCh$			ThCh$			ThCh$			ThCh$
Impairment losses of financial assets (See Note 8.d)		55,494		—			(371,558	)		(7,993,311	)		(5,141,179	)		(6,738,750	)		(7,937,817	)		(5,141,179	)		(7,110,308	)
Impairment losses of property, plant and equipment    (See Note 15)		—		(30,785,531	)		10,165,211			—			—			—			—			(30,785,531	)		10,165,211
Total		55,494		(30,785,531	)		9,793,653			(7,993,311	)		(5,141,179	)		(6,738,750	)		(7,937,817	)		(35,926,710	)		3,054,903