v3.24.0.1
Intangible assets and goodwill - Business acquisitions (Details) - USD ($)
$ in Millions
 12 Months Ended
Jan. 03, 2023
Dec. 31, 2023
2023 Acquisitions    
Business acquisition [line items]    
Owned assets   $ 15
Current assets    
Cash   5
Accounts receivable   63
Prepaid and other assets   3
Total current assets   71
Non-current assets    
Owned assets   15
Right-of-use lease assets   19
Identifiable intangible assets recognised as of acquisition date   694
Non-current assets recognised as of acquisition date   728
Identifiable assets acquired recognized as of acquisition date   799
Current liabilities    
Accounts payable and accrued liabilities   43
Income and other taxes payable   1
Current maturities of long-term debt   92
Current liabilities recognised as of acquisition date   136
Non-current liabilities    
Long-term debt   16
Deferred income taxes   69
Non-current liabilities recognised as of acquisition date   85
Total liabilities assumed   221
Net identifiable assets acquired   578
Goodwill   599
Net assets acquired   1,177
Acquisition-date fair value of total consideration transferred [abstract]    
Cash transferred   857
Provisions   195
Subordinate voting shares   125
Net assets acquired   1,177
WillowTree    
Business acquisition [line items]    
Owned assets   15
Current assets    
Cash   5
Accounts receivable   62
Prepaid and other assets   3
Total current assets   70
Non-current assets    
Owned assets   15
Right-of-use lease assets   19
Identifiable intangible assets recognised as of acquisition date   692
Non-current assets recognised as of acquisition date   726
Identifiable assets acquired recognized as of acquisition date   796
Current liabilities    
Accounts payable and accrued liabilities   43
Income and other taxes payable   1
Current maturities of long-term debt   91
Current liabilities recognised as of acquisition date   135
Non-current liabilities    
Long-term debt   16
Deferred income taxes   69
Non-current liabilities recognised as of acquisition date   85
Total liabilities assumed   220
Net identifiable assets acquired   576
Goodwill   599
Net assets acquired $ 1,175 1,175
Acquisition-date fair value of total consideration transferred [abstract]    
Cash transferred 856 856
Provisions 194 194
Subordinate voting shares 125 125
Net assets acquired $ 1,175 1,175
Other    
Business acquisition [line items]    
Owned assets   0
Current assets    
Cash   0
Accounts receivable   1
Prepaid and other assets   0
Total current assets   1
Non-current assets    
Owned assets   0
Right-of-use lease assets   0
Identifiable intangible assets recognised as of acquisition date   2
Non-current assets recognised as of acquisition date   2
Identifiable assets acquired recognized as of acquisition date   3
Current liabilities    
Accounts payable and accrued liabilities   0
Income and other taxes payable   0
Current maturities of long-term debt   1
Current liabilities recognised as of acquisition date   1
Non-current liabilities    
Long-term debt   0
Deferred income taxes   0
Non-current liabilities recognised as of acquisition date   0
Total liabilities assumed   1
Net identifiable assets acquired   2
Goodwill   0
Net assets acquired   2
Acquisition-date fair value of total consideration transferred [abstract]    
Cash transferred   1
Provisions   1
Subordinate voting shares   0
Net assets acquired   $ 2
Customer relationships    
Acquisition-date fair value of total consideration transferred [abstract]    
Useful life of intangible assets 15 years  
Brand Names, And Other Intangible Assets | Minimum    
Acquisition-date fair value of total consideration transferred [abstract]    
Useful life of intangible assets 3 years  
Brand Names, And Other Intangible Assets | Maximum    
Acquisition-date fair value of total consideration transferred [abstract]    
Useful life of intangible assets 10 years