XML 115 R91.htm IDEA: XBRL DOCUMENT v3.10.0.1
Pension and Other Postretirement Benefit Plans - Narrative (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Defined Benefit Plan Disclosure [Line Items]        
Accumulated benefit obligation   $ 19,000 $ 20,500  
Employer contributions to defined contribution savings plans   $ 136 $ 131 $ 126
Pension Benefits        
Defined Benefit Plan Disclosure [Line Items]        
Percentage of Company's pension investments categorized as Level 3 assets (as percent)   5.00% 2.00%  
Estimated net loss (gain) amounts that will be amortized from AOCI into net pension and postretirement benefit cost during next fiscal year   $ 204    
Estimated prior service cost (credit) amounts that will be amortized from AOCI into net pension and postretirement benefit cost during next fiscal year   (62)    
Pension Benefits | Significant Unobservable Inputs (Level 3)        
Defined Benefit Plan Disclosure [Line Items]        
Fair value of plan assets   826 $ 488  
Other Postretirement Benefits        
Defined Benefit Plan Disclosure [Line Items]        
Fair value of plan assets   968 1,114 $ 1,019
Expected contributions to the pension plans and other postretirement benefit plans during next fiscal year   15    
Estimated net loss (gain) amounts that will be amortized from AOCI into net pension and postretirement benefit cost during next fiscal year   (7)    
Estimated prior service cost (credit) amounts that will be amortized from AOCI into net pension and postretirement benefit cost during next fiscal year   (78)    
Other Postretirement Benefits | Significant Unobservable Inputs (Level 3)        
Defined Benefit Plan Disclosure [Line Items]        
Fair value of plan assets   $ 0 $ 0  
United States        
Defined Benefit Plan Disclosure [Line Items]        
Expected annual standard deviation in returns of the target portfolio which reflects both the equity allocation and the diversification benefits among the asset classes in which the portfolio invests (as percent)   11.00%    
Expected rate of return on plan assets (as percent)   8.20% 8.70% 8.60%
United States | Minimum        
Defined Benefit Plan Disclosure [Line Items]        
Expected rate of return on plan assets (as percent)   7.70%    
United States | Minimum | Forecast        
Defined Benefit Plan Disclosure [Line Items]        
Expected rate of return on plan assets (as percent) 7.70%      
United States | Maximum        
Defined Benefit Plan Disclosure [Line Items]        
Expected rate of return on plan assets (as percent)   8.30%    
United States | Maximum | Forecast        
Defined Benefit Plan Disclosure [Line Items]        
Expected rate of return on plan assets (as percent) 8.10%      
United States | U.S. equities | Minimum        
Defined Benefit Plan Disclosure [Line Items]        
Target allocation (as percent)   30.00%    
United States | U.S. equities | Maximum        
Defined Benefit Plan Disclosure [Line Items]        
Target allocation (as percent)   50.00%    
United States | International equities | Minimum        
Defined Benefit Plan Disclosure [Line Items]        
Target allocation (as percent)   15.00%    
United States | International equities | Maximum        
Defined Benefit Plan Disclosure [Line Items]        
Target allocation (as percent)   30.00%    
United States | Fixed Income Investments | Minimum        
Defined Benefit Plan Disclosure [Line Items]        
Target allocation (as percent)   30.00%    
United States | Fixed Income Investments | Maximum        
Defined Benefit Plan Disclosure [Line Items]        
Target allocation (as percent)   45.00%    
United States | Cash And Other Investments | Maximum        
Defined Benefit Plan Disclosure [Line Items]        
Target allocation (as percent)   5.00%    
United States | Pension Benefits        
Defined Benefit Plan Disclosure [Line Items]        
Accumulated benefit obligation   $ 10,400 $ 11,500  
Fair value of plan assets   9,648 10,896 $ 9,766
Expected contributions to the pension plans and other postretirement benefit plans during next fiscal year   50    
Estimated net loss (gain) amounts that will be amortized from AOCI into net pension and postretirement benefit cost during next fiscal year   141    
Estimated prior service cost (credit) amounts that will be amortized from AOCI into net pension and postretirement benefit cost during next fiscal year   (50)    
United States | Pension Benefits | Significant Unobservable Inputs (Level 3)        
Defined Benefit Plan Disclosure [Line Items]        
Fair value of plan assets   13 15 18
International | Pension Benefits        
Defined Benefit Plan Disclosure [Line Items]        
Fair value of plan assets   8,580 $ 9,339 $ 7,794
Expected contributions to the pension plans and other postretirement benefit plans during next fiscal year   $ 150    
Expected rate of return on plan assets (as percent)   5.10% 5.10% 5.60%
International | Pension Benefits | Significant Unobservable Inputs (Level 3)        
Defined Benefit Plan Disclosure [Line Items]        
Fair value of plan assets   $ 813 $ 473 $ 417