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Pension Benefit Plans (Narrative) (Details) - USD ($)
$ / shares in Units, $ in Millions
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Defined Benefit Plan Disclosure [Line Items]        
NAV per share, investment redemption, notice period   90 days    
Expense for all defined benefit and defined contributions pension plans   $ 224 $ 203 $ 167
Pension benefit plans        
Defined Benefit Plan Disclosure [Line Items]        
Unrecognized prior service credits, before tax   (1)    
Prior service credit, after tax   (1)    
Unrecognized actuarial losses, net of tax   (1,200)    
Unrecognized actuarial losses, net of tax   $ (919)    
Pension benefit plans | U.S. Pension Benefits        
Defined Benefit Plan Disclosure [Line Items]        
Long-term rate of return on asset assumptions   7.00% 7.00% 7.00%
Employer contributions   $ 140 $ 10  
Expected employer contributions within the next year   10    
Curtailment and settlement gains (losses) recognized   $ 0 $ 0  
Pension benefit plans | U.S. Pension Benefits | Scenario, forecast        
Defined Benefit Plan Disclosure [Line Items]        
Long-term rate of return on asset assumptions 6.75%      
Pension benefit plans | U.S. Pension Benefits | Minimum        
Defined Benefit Plan Disclosure [Line Items]        
Defined benefit plan, plan assets, target allocation, percentage   60.00%    
Pension benefit plans | U.S. Pension Benefits | Maximum        
Defined Benefit Plan Disclosure [Line Items]        
Defined benefit plan, plan assets, target allocation, percentage   70.00%    
Pension benefit plans | Non-U.S. Pension Benefits        
Defined Benefit Plan Disclosure [Line Items]        
Long-term rate of return on asset assumptions   3.40% 3.90%  
Employer contributions   $ 51 $ 44  
Expected employer contributions within the next year   44    
Curtailment and settlement gains (losses) recognized   $ (1) (7)  
Settlement loss, net of tax     $ (6)  
Settlement loss, per diluted common share     $ (0.01)  
Pension benefit plans | Non-U.S. Pension Benefits | Minimum        
Defined Benefit Plan Disclosure [Line Items]        
Long-term rate of return on asset assumptions   0.50% 0.80%  
Pension benefit plans | Non-U.S. Pension Benefits | Maximum        
Defined Benefit Plan Disclosure [Line Items]        
Long-term rate of return on asset assumptions   5.00% 5.00%  
Pension benefit plans | Non-U.S. Pension Benefits | Weighted average        
Defined Benefit Plan Disclosure [Line Items]        
Long-term rate of return on asset assumptions   3.40% 3.90%