Property, Plant and Equipment (Tables)

12 Months Ended

Dec. 31, 2017

Disclosure Of Property Plant And Equipment [Abstract]

Summary of Property Plant and Equipment

The following table shows property, plant and equipment as of December 31, 2017 and 2016:

	As of December 31,
	2017		2016
Classes of Property, Plant and Equipment, Net	ThCh$		ThCh$
Property, Plant and Equipment, Net		3,585,687,137		3,476,128,634
Construction in progress		666,590,543		688,387,124
Land		67,485,380		66,868,119
Buildings		12,793,641		13,020,474
Generation Plant and equipment		2,080,903,064		2,033,720,809
Network infrastructure		683,120,815		613,443,219
Fixtures and fittings		56,284,762		41,325,699
Other property, plant and equipment under financial lease		18,508,932		19,363,190

	2017		2016
Classes of Property, Plant and Equipment, Gross	ThCh$		ThCh$
Property, Plant and Equipment, Gross		6,726,796,186		6,471,364,618
Construction in progress		666,590,543		688,387,124
Land		67,485,380		66,868,119
Buildings		28,382,234		27,891,216
Generation Plant and equipment		4,636,175,749		4,481,701,141
Network infrastructure		1,151,951,280		1,050,212,442
Fixtures and fittings		147,450,968		127,544,544
Other property, plant and equipment under financial lease		28,760,032		28,760,032

Classes of Accumulated Depreciation and Impairment in Property, Plant	2017			2016
and Equipment	ThCh$			ThCh$
Total Accumulated Depreciation and Impairment in    Property, Plant and Equipment		(3,141,109,049	)		(2,995,235,984	)
Buildings		(15,588,593	)		(14,870,742	)
Generation Plant and equipment		(2,555,272,685	)		(2,447,980,332	)
Network infrastructure		(468,830,465	)		(436,769,223	)
Fixtures and fittings		(91,166,206	)		(86,218,845	)
Other property, plant and equipment under financial lease		(10,251,100	)		(9,396,842	)

Summary of Changes in Property Plant and Equipment

The detail and changes in property, plant, and equipment at December 31, 2017 and 2016, are as follows:

	Construction inprogress			Land			Buildings			Generation Plant and Equipment			Network infrastructure			Fixtures and Fittings			Other Property, Plant and Equipment under Financial Lease			Property, Plant and Equipment, Net
Changes in 2017	ThCh$			ThCh$			ThCh$			ThCh$			ThCh$			ThCh$			ThCh$			ThCh$
Opening balance January 1, 2017		688,387,124			66,868,119			13,020,474			2,033,720,809			613,443,219			41,325,699			19,363,190			3,476,128,634
Changes:
Increases other than from business combinations		281,007,995			—			—			—			—			2,811,255			—			283,819,250
Increases (decreases) from exchange differences, net		(101,444	)		(25,624	)		(44,699	)		(336,622	)		—			(83,651	)		—			(592,040	)
Depreciation (1) (3)		—			—			(717,851	)		(107,292,353	)		(32,061,242	)		(4,947,361	)		(854,258	)		(145,873,065	)
Increases (decreases) from transfers and other    changes		(273,509,759	)		776,933			439,284			155,711,630			99,419,024			17,162,888			—			—
Increases (decreases) for transfers		(273,509,759	)		776,933			439,284			155,711,630			99,419,024			17,162,888			—			—
Disposals and removals from service		(30,255,180	)		(31,447	)		(154,623	)		(1,704,924	)		(1,023,777	)		15,932			—			(33,154,019	)
Disposals		(5,099,800	)		(31,447	)		—			(435,327	)		(18,555	)		38,212			—			(5,546,917	)
Removals from service		(25,155,380	)		—			(154,623	)		(1,269,597	)		(1,005,222	)		(22,280	)		—			(27,607,102	)
Other increases (decreases)		1,061,807			(102,601	)		251,056			804,524			3,343,591			—			—			5,358,377
Total changes		(21,796,581	)		617,261			(226,833	)		47,182,255			69,677,596			14,959,063			(854,258	)		109,558,503
Closing balance December 31, 2017		666,590,543			67,485,380			12,793,641			2,080,903,064			683,120,815			56,284,762			18,508,932			3,585,687,137

	Construction in progress			Land			Buildings			Generation Plant and Equipment			Network infrastructure			Fixtures and Fittings			Other Property, Plant and Equipment under Financial Lease			Property, Plant and Equipment, Net
Changes in 2016	ThCh$			ThCh$			ThCh$			ThCh$			ThCh$			ThCh$			ThCh$			ThCh$
Opening balance January 1, 2016		636,148,748			66,900,933			13,481,093			2,072,402,503			589,334,703			20,716,643			20,075,072			3,419,059,695
Changes:
Increases other than from business combinations		244,473,325			—			24,934			—			1,443,508			3,126,834			—			249,068,601
Increases (decreases) from exchange differences, net		(37,543	)		(6,591	)		(11,711	)		(59,516	)		—			(33,227	)		—			(148,588	)
Depreciation (1)		—			—			(620,865	)		(99,397,373	)		(25,187,344	)		(4,497,175	)		(711,882	)		(130,414,639	)
Impairment losses recognized in profit or loss (2)		(30,785,531	)		—			—			—			—			—			—			(30,785,531	)
Increases (decreases) from transfers and other    changes		(128,045,183	)		104,268			147,023			60,822,509			48,308,750			22,123,585			—			3,460,952
Increases (decreases) for transfers		(127,694,878	)		104,268			147,023			55,464,141			48,308,750			23,670,696			—			—
Increases (decreases) from transfers from constructions in progress		(127,694,878	)		104,268			147,023			55,464,141			48,308,750			23,670,696			—			—
Increases (decreases) from other changes		(350,305	)		—			—			5,358,368			—			(1,547,111	)		—			3,460,952
Disposals and removals from service		(33,366,692	)		(130,491	)		—			(47,314	)		(456,398	)		(110,961	)		—			(34,111,856	)
Disposals		—			—			—			—			—			—			—			—
Removals from service		(33,366,692	)		(130,491	)		—			(47,314	)		(456,398	)		(110,961	)		—			(34,111,856	)
Other increases (decreases)		—			—			—			1,753,884						—			—			3,416,059,695
Total changes		52,238,376			(32,814	)		(460,619	)		(38,681,694	)		24,108,516			20,609,056			(711,882	)		57,068,939
Closing balance December 31, 2016		688,387,124			66,868,119			13,020,474			2,033,720,809			613,443,219			41,325,699			19,363,190			3,476,128,634

Schedule of Minimum Lease Payments Receivable

The present value of future lease payments derived from these finance leases is as follows:

	As of December 31,
	2017						2016
	Gross		Interest		Present Value		Gross		Interest		Present Value
	ThCh$		ThCh$		ThCh$		ThCh$		ThCh$		ThCh$
Less than one year		2,459,000		659,212		1,799,788		2,677,881		837,514		1,840,367
From one to five years		9,836,000		1,244,808		8,591,192		10,711,519		1,763,190		8,948,329
More than five years		4,377,544		159,610		4,217,934		7,445,079		484,128		6,960,951
Total		16,672,544		2,063,630		14,608,914		20,834,479		3,084,832		17,749,647

Disclosure Of Future Minimum Lease Payments Under Finance Leases Explanatory

As of December 31, 2017 and 2016, the total future lease payments under those contracts are as follows:

	As of December 31,
	2017		2016
	ThCh$		ThCh$
Less than one year		4,622,605		7,133,186
From one to five years		9,006,627		11,998,147
More than five years		1,345,183		9,015,356
Total		14,974,415		28,146,689