Shareowners' Equity and Noncontrolling Interest Shareowners' Equity and Noncontrolling Interest (Accelerated Stock Repurchase) (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
ASR Aggregate Purchase Price	$ 2,650,000,000		$ 2,650,000,000
ASR, Initial Price Paid Per Share			$ 121.24
ASR, Reduction to Shareowner's Equity	1,000,000,000	$ 425,000,000	$ 4,000,000,000	$ 1,095,000,000
ASR amount included in APIC to be reclassified to treasury stock			398,000,000
ASR amount included in Additional Paid in Capital reclassified to treasury stock	$ 398,000,000
Accelerated Share Repurchases, Final Price Paid Per Share	$ 116.11
Accelerated Stock Repurchase [Member]
ASR, Reduction to Shareowner's Equity			$ 2,250,000,000
Initial delivery, shares of Common Stock [Member]
ASR Shares Repurchased			18,600,000
Final delivery, shares of Common Stock [Member]
ASR Shares Repurchased	4,200,000