Shareowners' Equity and Noncontrolling Interest (Summary of Changes in Shareowners' Equity and Noncontrolling Interest) (Details) - USD ($)
$ in Millions |
3 Months Ended |
9 Months Ended |
Sep. 30, 2016 |
Sep. 30, 2015 |
Sep. 30, 2016 |
Sep. 30, 2015 |
| Shareowners' Equity, beginning of period |
$ 29,090
|
$ 30,377
|
$ 27,358
|
$ 31,213
|
| Noncontrolling interest, beginning of period |
1,558
|
1,561
|
1,486
|
1,351
|
| Total Equity, beginning of period |
30,648
|
31,938
|
28,844
|
32,564
|
| Net income, Shareowners' Equity |
1,480
|
1,362
|
4,042
|
4,330
|
| Net Income, Noncontrolling Interest |
91
|
99
|
(271)
|
(281)
|
| Net income, Total Equity |
1,571
|
1,461
|
4,313
|
4,611
|
| Total other comprehensive (loss) income, Shareowners' Equity |
(245)
|
(811)
|
(110)
|
(727)
|
| Total other comprehensive income (loss), Noncontrolling Interest |
5
|
(23)
|
(16)
|
63
|
| Total other comprehensive (loss) income |
(240)
|
(834)
|
(94)
|
(790)
|
| Total comprehensive income for the period, Shareowners' Equity |
1,235
|
551
|
3,932
|
3,603
|
| Total comprehensive income for the period, Noncontrolling Interest |
96
|
76
|
287
|
218
|
| Total comprehensive income for the period, Total Equity |
1,331
|
627
|
4,219
|
3,821
|
| Common Stock issued - equity unit remarketing |
0
|
1,100
|
0
|
1,100
|
| Common Stock issued under employee plans |
54
|
65
|
200
|
302
|
| Common Stock repurchased |
649
|
1,000
|
685
|
4,000
|
| Dividends on Common Stock |
526
|
547
|
1,561
|
1,643
|
| Dividends on ESOP Common Stock |
19
|
19
|
56
|
56
|
| Dividends attributable to noncontrolling interest |
129
|
113
|
270
|
229
|
| (Purchase) / sale of subsidiary shares from noncontrolling interest |
(24)
|
(1)
|
(17)
|
(22)
|
| Acquisition of noncontrolling interest |
29
|
0
|
63
|
173
|
| Disposition of noncontrolling interest |
|
|
0
|
3
|
| Other |
(1)
|
1
|
7
|
0
|
| Shareowners' Equity, end of period |
29,187
|
30,525
|
29,187
|
30,525
|
| Noncontrolling interest, end of period |
1,577
|
1,526
|
1,577
|
1,526
|
| Total Equity, end of period |
30,764
|
32,051
|
30,764
|
32,051
|
| Shareowners' Equity [Member] |
|
|
|
|
| (Purchase) / sale of subsidiary shares from noncontrolling interest |
(2)
|
(1)
|
4
|
(12)
|
| Other |
0
|
3
|
(3)
|
6
|
| Noncontrolling Interest [Member] |
|
|
|
|
| (Purchase) / sale of subsidiary shares from noncontrolling interest |
(22)
|
0
|
(21)
|
(10)
|
| Other |
$ (1)
|
$ (2)
|
$ 10
|
$ (6)
|