Earnings Per Share (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Earnings Per Share [Abstract]
Net income attributable to common shareowners	$ 1,542	$ 1,680	$ 2,968	$ 2,893
Basic weighted average number of shares outstanding	877,300,000.0	900,100,000.0	884,800,000.0	900,300,000.0
Stock awards and equity units	12,100,000.0	14,600,000.0	13,000,000.0	14,500,000.0
Diluted weighted average number of shares outstanding	889,400,000.0	914,700,000.0	897,800,000.0	914,800,000.0
Basic	$ 1.76	$ 1.87	$ 3.35	$ 3.21
Diluted	$ 1.73	$ 1.84	$ 3.31	$ 3.16
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	400,000	0	400,000	0