XML 110 R118.htm IDEA: XBRL DOCUMENT v3.19.3.a.u2
Accumulated Other Comprehensive Loss (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Increase (Decrease) in Stockholders' Equity [Roll Forward]      
Balance at beginning of period $ 19,828 $ 23,491  
Other comprehensive loss before reclassifications (396) (202)  
Amounts reclassified from accumulated other comprehensive loss 177 143  
Net current-period other comprehensive income (loss) (219) (59) $ 122
Balance at end of period 13,470 19,828 23,491
Accounting Standards Update 2018-02      
Increase (Decrease) in Stockholders' Equity [Roll Forward]      
Cumulative effect of adoption of ASU 2018-02, Reclassification of Certain Tax Effects from Accumulated Other Comprehensive Income   (407)  
Defined Benefit Plans | Pension Plan      
Increase (Decrease) in Stockholders' Equity [Roll Forward]      
Balance at beginning of period (2,173) (1,731)  
Other comprehensive loss before reclassifications (219) (195)  
Amounts reclassified from accumulated other comprehensive loss 163 128  
Net current-period other comprehensive income (loss) (56) (67)  
Balance at end of period (2,229) (2,173) (1,731)
Defined Benefit Plans | Pension Plan | Accounting Standards Update 2018-02      
Increase (Decrease) in Stockholders' Equity [Roll Forward]      
Cumulative effect of adoption of ASU 2018-02, Reclassification of Certain Tax Effects from Accumulated Other Comprehensive Income   (375)  
Defined Benefit Plans | Other Postretirement Benefits Plan      
Increase (Decrease) in Stockholders' Equity [Roll Forward]      
Balance at beginning of period (58) (235)  
Other comprehensive loss before reclassifications (138) 194  
Amounts reclassified from accumulated other comprehensive loss 12 15  
Net current-period other comprehensive income (loss) (126) 209  
Balance at end of period (184) (58) (235)
Defined Benefit Plans | Other Postretirement Benefits Plan | Accounting Standards Update 2018-02      
Increase (Decrease) in Stockholders' Equity [Roll Forward]      
Cumulative effect of adoption of ASU 2018-02, Reclassification of Certain Tax Effects from Accumulated Other Comprehensive Income   (32)  
Foreign Currency Translation Adjustment and Other      
Increase (Decrease) in Stockholders' Equity [Roll Forward]      
Balance at beginning of period (230) (29)  
Other comprehensive loss before reclassifications 2 (201)  
Amounts reclassified from accumulated other comprehensive loss 0 0  
Net current-period other comprehensive income (loss) 2 (201)  
Balance at end of period (228) (230) (29)
Foreign Currency Translation Adjustment and Other | Accounting Standards Update 2018-02      
Increase (Decrease) in Stockholders' Equity [Roll Forward]      
Cumulative effect of adoption of ASU 2018-02, Reclassification of Certain Tax Effects from Accumulated Other Comprehensive Income   0  
Interest Rate Swap      
Increase (Decrease) in Stockholders' Equity [Roll Forward]      
Balance at beginning of period 0    
Other comprehensive loss before reclassifications (41)    
Amounts reclassified from accumulated other comprehensive loss 2    
Net current-period other comprehensive income (loss) (39)    
Balance at end of period (39) 0  
AOCI Attributable to Parent      
Increase (Decrease) in Stockholders' Equity [Roll Forward]      
Balance at beginning of period (2,461) (1,995) (2,117)
Net current-period other comprehensive income (loss) (219) (59) 122
Balance at end of period $ (2,680) (2,461) $ (1,995)
AOCI Attributable to Parent | Accounting Standards Update 2018-02      
Increase (Decrease) in Stockholders' Equity [Roll Forward]      
Cumulative effect of adoption of ASU 2018-02, Reclassification of Certain Tax Effects from Accumulated Other Comprehensive Income   $ (407)