v3.19.3.a.u2
Segment Information (Schedule of Revenues by Geographic Region) (Details) - USD ($)
$ in Millions
 3 Months Ended 12 Months Ended
Dec. 31, 2019
Sep. 30, 2019
 [1]
Jun. 30, 2019
 [1]
Mar. 31, 2019
 [1]
Dec. 31, 2018
Sep. 30, 2018
 [1]
Jun. 30, 2018
 [1]
Mar. 31, 2018
 [1]
Sep. 30, 2017
Jun. 30, 2017
Mar. 31, 2017
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Revenues from External Customers and Long-Lived Assets [Line Items]                            
Revenues $ 46,821 [1],[2] $ 44,588 $ 44,957 $ 44,827 $ 47,993 [1] $ 45,739 $ 38,986 $ 38,038 $ 45,739 $ 38,986 $ 38,038 $ 181,193 $ 170,756 $ 160,546
Property, plant and equipment - net 130,128       131,473             130,128 131,473 125,222
United States [Member]                            
Revenues from External Customers and Long-Lived Assets [Line Items]                            
Revenues                       162,344 154,795 149,841
Property, plant and equipment - net 122,567       123,457             122,567 123,457 118,200
Europe [Member]                            
Revenues from External Customers and Long-Lived Assets [Line Items]                            
Revenues                       6,137 4,073 1,064
Property, plant and equipment - net 1,854       1,634             1,854 1,634 392
Mexico [Member]                            
Revenues from External Customers and Long-Lived Assets [Line Items]                            
Revenues                       3,198 3,100 2,913
Property, plant and equipment - net 3,648       3,467             3,648 3,467 3,619
Brazil [Member]                            
Revenues from External Customers and Long-Lived Assets [Line Items]                            
Revenues                       2,761 2,724 2,948
Property, plant and equipment - net 1,057       1,213             1,057 1,213 1,447
All other Latin America [Member]                            
Revenues from External Customers and Long-Lived Assets [Line Items]                            
Revenues                       3,219 3,055 2,743
Property, plant and equipment - net 544       1,217             544 1,217 1,294
Asia/Pacific Rim [Member]                            
Revenues from External Customers and Long-Lived Assets [Line Items]                            
Revenues                       2,651 2,214 829
Property, plant and equipment - net 390       408             390 408 194
Other [Member]                            
Revenues from External Customers and Long-Lived Assets [Line Items]                            
Revenues                       883 795 208
Property, plant and equipment - net $ 68       $ 77             $ 68 $ 77 $ 76
[1] Includes actuarial gains and losses on pension and postretirement benefit plans (Note 15).
[2] Includes an asset abandonment charge (Note 7).