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Income Taxes Incomes Taxes (Details) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2023
Jun. 30, 2022
Jun. 30, 2023
Jun. 30, 2022
Operating Loss Carryforwards [Line Items]        
Income tax provision (benefit) $ 134 $ 357 $ 303 $ 758
Effective Income Tax Rate Reconciliation, Percent 18.20% 21.10% 19.50% 24.10%
Less: Net earnings attributable to noncontrolling interest $ 79 $ 174 $ 169 $ 342
Effective Income Tax Rate Reconciliation, period increase/(decrease) due to noncontrolling interest 2.10% 2.40% 2.30% 2.90%
Effective Income Tax Rate Reconciliation, Tax Expense (Benefit), Share-based Payment Arrangement, Amount       $ 22
Income Tax Examination, Interest Expense   $ 5    
Effective Income Tax Rate Reconciliation, Tax Contingency, Foreign, Amount   2    
Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest $ 740 1,696 $ 1,559 3,148
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   129   129
Unrecognized Tax Benefits, Interest on Income Taxes Accrued   104   104
Effective Income Tax Rate Reconciliation, Tax Contingency, Foreign, Amount       78
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       314
Income Taxes Receivable, Noncurrent   359   359
Accrued Income Taxes, Noncurrent   30   30
Unrecognized Tax Benefits, Income Tax Penalties Accrued   116   116
Foreign Tax Authority | Canada Revenue Agency [Member] | Tax Year 2012 and After        
Operating Loss Carryforwards [Line Items]        
Income Tax Examination, Interest Expense   23   86
Effective Income Tax Rate Reconciliation, Tax Contingency, Foreign, Amount   21   19
Income Tax Examination, Estimate of Possible Loss       26
Unrecognized Tax Benefits, Estimated Interest on Income Taxes Accrued, Net of Taxes   93   93
Income Tax Examination, Interest Expense, Net of Taxes   24    
Domestic Tax Authority        
Operating Loss Carryforwards [Line Items]        
Income Taxes Receivable   $ 51   $ 51