Cash and cash equivalents and Investments and Additional information on the consolidated statements of cash flows - Breakdown of the net cash flow provided by operating activities (Details)
$ in Millions, $ in Millions

12 Months Ended

Dec. 31, 2017

ARS ($)

Dec. 31, 2016

ARS ($)

Dec. 31, 2015

ARS ($)

Dec. 31, 2017

USD ($)

Dec. 31, 2017

ARS ($)

Dec. 31, 2016

USD ($)

Dec. 31, 2016

ARS ($)

Dec. 31, 2014

ARS ($)

Cash and cash equivalents and Investments. Additional information on the consolidated statements of cash flows

Cash and cash equivalents

$ 153

$ 2,831

$ 250

$ 3,945

Total cash and cash equivalents

$ 870

$ 2,831

$ 3,945

$ 684

Collections

Collections from customers

$ 71,113

$ 55,928

41,930

Interests from customers

762

366

182

Interests from investments

670

190

Mobile operators collections

1,282

885

843

Subtotal

73,827

57,238

43,145

Payments

For the acquisition of goods and services and others

(19,557)

(17,120)

(12,784)

For the acquisition of inventories

(5,520)

(5,383)

(6,343)

Salaries and social security payables and severance payments

(11,669)

(9,113)

(6,885)

CPP payments

(1,132)

(393)

(413)

Income taxes (include tax return and payments in advance)

(2,400)

(1,700)

(1,631)

Other taxes and taxes and fees with the Regulatory Authority

(13,399)

(10,731)

(7,775)

Foreign currency exchange differences related to the payments to suppliers

(818)

(1,433)

(502)

Inventory suppliers

(269)

(295)

(182)

PP&E suppliers

(425)

(1,467)

(188)

Other suppliers

(119)

(144)

(31)

NDF

(5)

473

(101)

Subtotal

(54,495)

(45,873)

(36,333)

Total cash flows provided by operating activities

$ 19,332

$ 11,365

$ 6,812

- Definition

The amount of cash on hand and demand deposits, along with short-term, highly liquid investments that are readily convertible to known amounts of cash and that are subject to an insignificant risk of changes in value. [Refer: Cash; Cash equivalents]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 7
-IssueDate 2017-01-01
-Paragraph 45
-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=7&date=2017-03-01&anchor=para_45&doctype=Standard
-URIDate 2017-03-09

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 12
-IssueDate 2017-01-01
-Paragraph B13
-Subparagraph a
-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=12&date=2017-03-01&anchor=para_B13_a&doctype=Appendix&seq=2
-URIDate 2017-03-09

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 1
-IssueDate 2017-01-01
-Paragraph 54
-Subparagraph i
-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2017-03-01&anchor=para_54_i&doctype=Standard
-URIDate 2017-03-09

Cash and cash equivalents and Investments and Additional information on the consolidated statements of cash flows - Breakdown of the net cash flow provided by operating activities (Details) $ in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2017 ARS ($)	Dec. 31, 2016 ARS ($)	Dec. 31, 2015 ARS ($)	Dec. 31, 2017 USD ($)	Dec. 31, 2017 ARS ($)	Dec. 31, 2016 USD ($)	Dec. 31, 2016 ARS ($)	Dec. 31, 2014 ARS ($)
Cash and cash equivalents and Investments. Additional information on the consolidated statements of cash flows
Cash and cash equivalents				$ 153	$ 2,831	$ 250	$ 3,945
Total cash and cash equivalents			$ 870		$ 2,831		$ 3,945	$ 684
Collections
Collections from customers	$ 71,113	$ 55,928	41,930
Interests from customers	762	366	182
Interests from investments	670	59	190
Mobile operators collections	1,282	885	843
Subtotal	73,827	57,238	43,145
Payments
For the acquisition of goods and services and others	(19,557)	(17,120)	(12,784)
For the acquisition of inventories	(5,520)	(5,383)	(6,343)
Salaries and social security payables and severance payments	(11,669)	(9,113)	(6,885)
CPP payments	(1,132)	(393)	(413)
Income taxes (include tax return and payments in advance)	(2,400)	(1,700)	(1,631)
Other taxes and taxes and fees with the Regulatory Authority	(13,399)	(10,731)	(7,775)
Foreign currency exchange differences related to the payments to suppliers	(818)	(1,433)	(502)
Inventory suppliers	(269)	(295)	(182)
PP&E suppliers	(425)	(1,467)	(188)
Other suppliers	(119)	(144)	(31)
NDF	(5)	473	(101)
Subtotal	(54,495)	(45,873)	(36,333)
Total cash flows provided by operating activities	$ 19,332	$ 11,365	$ 6,812