Shareowners' Equity and Noncontrolling Interest (Summary of Changes in Shareowners' Equity and Noncontrolling Interest) (Details) (USD $)	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Stockholders' Equity Note [Abstract]
Redeemable noncontrolling interest, beginning of period	$ 140,000,000	$ 111,000,000
Redeemable noncontrolling interest, end of period	135,000,000	137,000,000
Statement [Line Items]
Shareowners' Equity, beginning of period	31,213,000,000	31,866,000,000
Shareowners' Equity, end of period	28,650,000,000	32,317,000,000
Noncontrolling interest, beginning of period	1,351,000,000	1,353,000,000
Noncontrolling interest, end of period	1,517,000,000	1,378,000,000
Total Equity, beginning of period	32,564,000,000	33,219,000,000
Total Equity, end of period	30,167,000,000	33,695,000,000
Net income attributable to common shareowners	1,426,000,000	1,213,000,000
Net Income, Noncontrolling Interest	72,000,000	93,000,000
Net income, Total Equity	1,498,000,000	1,306,000,000
Total other comprehensive income, Shareowners' Equity	(550,000,000)	(61,000,000)
Total other comprehensive loss, Noncontrolling Interest	40,000,000	7,000,000
Total other comprehensive loss, Total Equity	(590,000,000)	(68,000,000)
Total comprehensive income for the period, Shareowners' Equity	876,000,000	1,152,000,000
Total comprehensive income for the period, Noncontrolling Interest	32,000,000	86,000,000
Total comprehensive income for the period, Total Equity	908,000,000	1,238,000,000
Common Stock issued under employee plans	125,000,000	165,000,000
Common Stock repurchased	3,000,000,000	335,000,000
Dividends on Common Stock	553,000,000	514,000,000
Dividends on ESOP Common Stock	19,000,000	18,000,000
Dividends attributable to noncontrolling interest	55,000,000	56,000,000
Sale of subsidiary shares from noncontrolling interest	(25,000,000)	(25,000,000)
Acquisition of noncontrolling interest	172,000,000	0
Disposition noncontrolling interest	3,000,000	0
Redeemable noncontrolling interest	3,000,000	(29,000,000)
Increase in common stock for sale of subsidiary shares	23,000,000	4,000,000
Decrease in common stock for purchase of subsidiary shares	12,000,000	3,000,000
Net income attributable to common shareowners after transfers to noncontrolling interests	1,437,000,000	1,214,000,000
Shareowners' Equity [Member]
Statement [Line Items]
Total comprehensive income for the period, Shareowners' Equity	876,000,000	1,152,000,000
Common Stock issued under employee plans	125,000,000	165,000,000
Common Stock repurchased	3,000,000,000	335,000,000
Dividends on Common Stock	553,000,000	514,000,000
Dividends on ESOP Common Stock	19,000,000	18,000,000
Sale of subsidiary shares from noncontrolling interest	(11,000,000)	(1,000,000)
Redeemable noncontrolling interest	(3,000,000)	0
Noncontrolling Interest [Member]
Statement [Line Items]
Total comprehensive income for the period, Noncontrolling Interest	32,000,000	86,000,000
Dividends attributable to noncontrolling interest	55,000,000	56,000,000
Sale of subsidiary shares from noncontrolling interest	(14,000,000)	(24,000,000)
Acquisition of noncontrolling interest	172,000,000	0
Disposition noncontrolling interest	3,000,000	0
Redeemable noncontrolling interest	6,000,000	(29,000,000)
Redeemable Noncontrolling Interest [Member]
Statement [Line Items]
Net income, Total Equity	1,000,000	6,000,000
Dividends attributable to noncontrolling interest	3,000,000	3,000,000
Redeemable noncontrolling interest	0	25,000,000
Foreign currency translation, net	(7,000,000)	(2,000,000)
Redeemable noncontrolling interest fair value adjustment	4,000,000	0
Accelerated Stock Repurchase [Member]
Statement [Line Items]
Common Stock repurchased	$ 2,250,000,000