Shareowners' Equity and Noncontrolling Interest (Summary of Changes in Shareowners' Equity and Noncontrolling Interest) (Details) (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012	Dec. 31, 2012
Equity, beginning of period	$ 27,563,000,000	$ 23,549,000,000	$ 27,069,000,000	$ 22,820,000,000
Net income	1,653,000,000	1,422,000,000	3,001,000,000	1,829,000,000
Total other comprehensive income (loss)	(138,000,000)	(701,000,000)	(578,000,000)	(204,000,000)
Total comprehensive income for the period	1,515,000,000	721,000,000	2,423,000,000	1,625,000,000
Common Stock issued under employee plans	201,000,000	104,000,000	452,000,000	333,000,000
Common Stock repurchased	(335,000,000)	0	(670,000,000)	0
Quarterly Contract Adjustment Payments to Equity Units Holders	0	(216,000,000)	0	(216,000,000)
Dividends on Common Stock	(465,000,000)	(413,000,000)	(930,000,000)	(825,000,000)
Dividends on ESOP Common Stock	(17,000,000)	(16,000,000)	(34,000,000)	(32,000,000)
Dividends attributable to noncontrolling interest	(71,000,000)	(72,000,000)	(127,000,000)	(130,000,000)
Purchase of subsidiary shares from noncontrolling interest	(19,000,000)	(2,000,000)	(29,000,000)	(11,000,000)
Noncontrolling Interest, Increase from Subsidiary Equity Issuance	5,000,000	20,000,000	242,000,000	35,000,000
Acquisition of noncontrolling interest	0	47,000,000	0	55,000,000
Disposition of noncontrolling interest	(5,000,000)	0	(5,000,000)	(4,000,000)
Redeemable noncontrolling interest in subsidiaries' earnings	(2,000,000)	(7,000,000)	(2,000,000)	(11,000,000)
Redeemable noncontrolling interest in other comprehensive income (loss)	2,000,000	7,000,000	6,000,000	8,000,000
Noncontrolling Interest, Change in Redemption Value	0	(1,000,000)	0	(1,000,000)
Redeemable noncontrolling interest reclassification to noncontrolling interest	(3,000,000)	4,000,000	(26,000,000)	79,000,000
Equity, end of period	28,369,000,000	23,725,000,000	28,369,000,000	23,725,000,000
Redeemable noncontrolling interest, beginning of period	255,000,000	243,000,000	238,000,000	358,000,000
Redeemable noncontrolling interest, end of period	174,000,000	238,000,000	174,000,000	238,000,000
Transfers to noncontrolling interests - Decrease in common stock for purchase of subsidiary shares	(18,000,000)	0	(19,000,000)	(8,000,000)
Change from net income attributable to common shareowners and transfers to noncontrolling interest	1,542,000,000	1,328,000,000	2,807,000,000	1,650,000,000
Accumulated other comprehensive loss	(6,000,000,000)		(6,000,000,000)		(5,448,000,000)
Shareowners' Equity [Member]
Equity, beginning of period	26,194,000,000	22,492,000,000	25,914,000,000	21,880,000,000
Net income	1,560,000,000	1,328,000,000	2,826,000,000	1,658,000,000
Total other comprehensive income (loss)	(133,000,000)	(674,000,000)	(552,000,000)	(185,000,000)
Total comprehensive income for the period	1,427,000,000	654,000,000	2,274,000,000	1,473,000,000
Common Stock issued under employee plans	201,000,000	104,000,000	452,000,000	333,000,000
Common Stock repurchased	(335,000,000)	0	(670,000,000)	0
Quarterly Contract Adjustment Payments to Equity Units Holders	0	(216,000,000)	0	(216,000,000)
Dividends on Common Stock	(465,000,000)	(413,000,000)	(930,000,000)	(825,000,000)
Dividends on ESOP Common Stock	(17,000,000)	(16,000,000)	(34,000,000)	(32,000,000)
Purchase of subsidiary shares from noncontrolling interest	(18,000,000)	0	(19,000,000)	(8,000,000)
Noncontrolling Interest, Increase from Subsidiary Equity Issuance	0	0	0	0
Noncontrolling Interest, Change in Redemption Value	0	(1,000,000)	0	(1,000,000)
Equity, end of period	26,987,000,000	22,604,000,000	26,987,000,000	22,604,000,000
Noncontrolling Interest [Member]
Equity, beginning of period	1,369,000,000	1,057,000,000	1,155,000,000	940,000,000
Net Income (Loss) Attributable to Noncontrolling Interest	93,000,000	94,000,000	175,000,000	171,000,000
Total other comprehensive income (loss)	(5,000,000)	(27,000,000)	(26,000,000)	(19,000,000)
Total comprehensive income for the period	88,000,000	67,000,000	149,000,000	152,000,000
Dividends attributable to noncontrolling interest	(71,000,000)	(72,000,000)	(127,000,000)	(130,000,000)
Purchase of subsidiary shares from noncontrolling interest	(1,000,000)	(2,000,000)	(10,000,000)	(3,000,000)
Noncontrolling Interest, Increase from Subsidiary Equity Issuance	5,000,000	20,000,000	242,000,000	35,000,000
Acquisition of noncontrolling interest	0	47,000,000	0	55,000,000
Disposition of noncontrolling interest	(5,000,000)	0	(5,000,000)	(4,000,000)
Redeemable noncontrolling interest in subsidiaries' earnings	(2,000,000)	(7,000,000)	(2,000,000)	(11,000,000)
Redeemable noncontrolling interest in other comprehensive income (loss)	2,000,000	7,000,000	6,000,000	8,000,000
Redeemable noncontrolling interest reclassification to noncontrolling interest	(3,000,000)	4,000,000	(26,000,000)	79,000,000
Equity, end of period	1,382,000,000	1,121,000,000	1,382,000,000	1,121,000,000
Redeemable Noncontrolling Interest [Member]
Net income	1,000,000	7,000,000	2,000,000	11,000,000
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax	(2,000,000)	(7,000,000)	(6,000,000)	(8,000,000)
Dividends attributable to noncontrolling interest	0	0	(3,000,000)	(11,000,000)
Purchase of subsidiary shares from noncontrolling interest	0	(2,000,000)	0	(34,000,000)
Disposition of noncontrolling interest	(82,000,000)	0	(82,000,000)	0
Noncontrolling Interest, Change in Redemption Value	0	1,000,000	0	1,000,000
Redeemable noncontrolling interest reclassification to noncontrolling interest	$ 2,000,000	$ (4,000,000)	$ 25,000,000	$ (79,000,000)