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Income Taxes Incomes Taxes (Details) - USD ($)
$ in Millions
 3 Months Ended 12 Months Ended
Mar. 31, 2023
Mar. 31, 2022
Dec. 31, 2022
Operating Loss Carryforwards [Line Items]      
Income tax provision (benefit) $ 169 $ 401  
Effective Income Tax Rate Reconciliation, Percent 20.60% 27.60%  
Less: Net earnings attributable to noncontrolling interest $ 90 $ 168  
Effective Income Tax Rate Reconciliation, period increase/(decrease) due to noncontrolling interest 2.60% 3.70%  
Effective Income Tax Rate Reconciliation, Tax Expense (Benefit), Share-based Payment Arrangement, Amount $ 20    
Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest 819 $ 1,452  
Income Taxes Paid     $ 224
Foreign Tax Authority | Canada Revenue Agency [Member]      
Operating Loss Carryforwards [Line Items]      
Effective Income Tax Rate Reconciliation, Tax Settlement, Foreign, Amount 78    
Foreign Tax Authority | Canada Revenue Agency [Member] | Tax Years 2006-2011      
Operating Loss Carryforwards [Line Items]      
Income Tax Examination, Liability (Refund) Adjustment from Settlement with Taxing Authority 127    
Unrecognized Tax Benefits, Interest on Income Taxes Accrued 99    
Effective Income Tax Rate Reconciliation, Tax Contingency, Foreign, Amount 76    
Foreign Tax Authority | Canada Revenue Agency [Member] | Tax Years 2012 and After      
Operating Loss Carryforwards [Line Items]      
Unrecognized Tax Benefits, Decrease Resulting from Prior Period Tax Positions 319    
Income Taxes Receivable, Noncurrent 329    
Accrued Income Taxes, Noncurrent 28    
Unrecognized Tax Benefits, Income Tax Penalties Accrued 91    
Foreign Tax Authority | Canada Revenue Agency [Member] | Tax Year 2012 and After      
Operating Loss Carryforwards [Line Items]      
Income Tax Examination, Interest Expense 63    
Effective Income Tax Rate Reconciliation, Tax Contingency, Foreign, Amount 2    
Income Tax Examination, Estimate of Possible Loss 12    
Unrecognized Tax Benefits, Estimated Interest on Income Taxes Accrued, Net of Taxes 69    
Domestic Tax Authority      
Operating Loss Carryforwards [Line Items]      
Income Taxes Receivable $ 51