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INCOME TAXES - Narrative (Details)
€ in Millions, $ in Millions, $ in Millions
12 Months Ended
Nov. 08, 2022
EUR (€)
Aug. 08, 2017
USD ($)
Dec. 31, 2022
USD ($)
subsidiary
Dec. 31, 2022
CAD ($)
subsidiary
Dec. 31, 2021
USD ($)
Dec. 31, 2022
CAD ($)
Income Tax [Line Items]            
Valuation allowance against deferred tax assets     $ 2,023   $ 2,222  
Unrecognized tax benefits including interest and penalties     881   927  
Portion of unrecognized tax benefits, if recognized, would affect the Company's effective tax rate     384   217  
Unrecognized tax benefits, net increase for tax positions of current year     156   79  
Unrecognized tax benefits, net decrease for tax positions of prior years     203      
Unrecognized tax benefits, net increase for tax positions of prior years         177  
Accrued interest and penalties related to unrecognized tax benefits     32   41  
Net increase (decrease) recognized in interest and penalties     $ (9)   8  
Number of subsidiaries file federal income tax returns in Canada, U.S., and other foreign jurisdictions (or more) | subsidiary     1 1    
Estimate of possible loss, income tax examination (up to)     $ 2,100      
Possible decrease in unrecognized tax benefits realized in next twelve months     4      
Tax Year 2013            
Income Tax [Line Items]            
Estimate of possible loss, income tax examination (up to)       $ 90    
Canadian Federal and Provincial            
Income Tax [Line Items]            
Decrease in valuation allowance     199   30  
Accumulated losses available for federal and provincial purposes     5,878   6,669  
Unclaimed investment tax credits and research and development credits     27   31  
Valuation allowance against deferred tax assets     1,869   1,965  
Canadian Federal and Provincial | Pooled Scientific Research and Experimental Development            
Income Tax [Line Items]            
Tax credit carryforward     188   196  
United States - Federal            
Income Tax [Line Items]            
Accumulated losses available for federal and provincial purposes     241   266  
Unclaimed investment tax credits and research and development credits     75   119  
Ireland | Revenue Commissioners, Ireland            
Income Tax [Line Items]            
Accumulated losses available for federal and provincial purposes     $ 10,691   $ 10,040  
Ireland | Australian Taxation Office            
Income Tax [Line Items]            
Estimate of possible loss, income tax examination (up to)   $ 117        
Ireland | Tax Year 2005 through Tax Year 2009 | Canada Revenue Agency            
Income Tax [Line Items]            
Reduction in NOLs           $ 44
Ireland | Tax Year 2012 | Canada Revenue Agency            
Income Tax [Line Items]            
Estimate of possible loss, income tax examination (up to)       $ 85    
Ireland | Tax Year 2015 | Canada Revenue Agency            
Income Tax [Line Items]            
Reduction in NOLs           21
Ireland | Tax Year 2016 | Canada Revenue Agency            
Income Tax [Line Items]            
Reduction in NOLs           $ 23
Luxembourg | Tax Year 2018 and 2019            
Income Tax [Line Items]            
Estimate of possible loss, income tax examination (up to) | € € 271.7