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Property, plant and equipment
12 Months Ended
Dec. 31, 2021
Property, plant and equipment [abstract]  
Property, plant and equipment
Note 17 Property, plant and equipment

FOR THE YEAR ENDED DECEMBER 31, 2021 NOTE
NETWORK
INFRASTRUCTURE
AND EQUIPMENT (1)
LAND AND
BUILDINGS (1)
ASSETS UNDER
CONSTRUCTION
TOTAL
COST  
January 1, 2021   69,477  7,832  1,889  79,198 
Additions   2,643  326  2,515  5,484 
Acquired through business combinations   2  12    14 
Transfers   358  771  (2,163) (1,034)
Retirements and disposals   (1,550) (37)   (1,587)
Impairment losses recognized in earnings 7 (4) (15)   (19)
Reclassified to assets held for sale 16 (3)     (3)
December 31, 2021   70,923  8,889  2,241  82,053 
ACCUMULATED DEPRECIATION  
January 1, 2021   47,563  4,122    51,685 
Depreciation   3,220  407    3,627 
Retirements and disposals   (1,515) (27)   (1,542)
Transfers (95) 191    96 
Reclassified to assets held for sale 16 (1)     (1)
Other   (50) 3    (47)
December 31, 2021   49,122  4,696    53,818 
NET CARRYING AMOUNT  
January 1, 2021   21,914  3,710  1,889  27,513 
December 31, 2021   21,801  4,193  2,241  28,235 
(1)Includes right-of-use assets. See Note 18, Leases, for additional details.
FOR THE YEAR ENDED DECEMBER 31, 2020 NOTE
NETWORK
INFRASTRUCTURE
AND EQUIPMENT (1)
LAND AND
BUILDINGS (1)
ASSETS UNDER
CONSTRUCTION
TOTAL
COST              
January 1, 2020   67,597  8,079  1,687  77,363 
Additions   2,414  247  2,071  4,732 
Acquired through business combinations   — 
Transfers   964  49  (1,825) (812)
Retirements and disposals   (1,348) (54) (32) (1,434)
Impairment losses recognized in earnings 7 (17) (9) (1) (27)
Discontinued operations 37 (135) (485) (11) (631)
December 31, 2020   69,477  7,832  1,889  79,198 
ACCUMULATED DEPRECIATION              
January 1, 2020   45,914  3,813  —  49,727 
Depreciation   3,035  440  —  3,475 
Retirements and disposals   (1,268) (54) —  (1,322)
Discontinued operations 37 (70) (77) —  (147)
Other   (48) —  —  (48)
December 31, 2020   47,563  4,122  —  51,685 
NET CARRYING AMOUNT              
January 1, 2020   21,683  4,266  1,687  27,636 
December 31, 2020   21,914  3,710  1,889  27,513 
(1)Includes right-of-use assets. See Note 18, Leases, for additional details.