SIGNIFICANT ACCOUNTING POLICIES - Intangible Assets (Details)	12 Months Ended
	Dec. 31, 2025
5G licenses
SIGNIFICANT ACCOUNTING POLICIES
Average period for amortization	20 years
3G/4G licenses
SIGNIFICANT ACCOUNTING POLICIES
Average period for amortization	15 years
Incremental Costs from the Acquisition of Contracts
SIGNIFICANT ACCOUNTING POLICIES
Average period for amortization	2 years
Content activation
SIGNIFICANT ACCOUNTING POLICIES
Average period for amortization	2 years
Minimum \| Nucleo's licenses
SIGNIFICANT ACCOUNTING POLICIES
Average period for amortization	5 years
Minimum \| Customer Relationship
SIGNIFICANT ACCOUNTING POLICIES
Average period for amortization	5 years
Minimum \| Internally generated software
SIGNIFICANT ACCOUNTING POLICIES
Average period for amortization	5 years
Minimum \| Other
SIGNIFICANT ACCOUNTING POLICIES
Average period for amortization	2 years
Maximum \| Nucleo's licenses
SIGNIFICANT ACCOUNTING POLICIES
Average period for amortization	10 years
Maximum \| Customer Relationship
SIGNIFICANT ACCOUNTING POLICIES
Average period for amortization	14 years
Maximum \| Internally generated software
SIGNIFICANT ACCOUNTING POLICIES
Average period for amortization	10 years
Maximum \| Other
SIGNIFICANT ACCOUNTING POLICIES
Average period for amortization	28 years
TMA \| Brand
SIGNIFICANT ACCOUNTING POLICIES
Average period for amortization	1 year