Shareowners' Equity and Noncontrolling Interest Shareowners' Equity and Noncontrolling Interest (Accelerated Stock Repurchase) (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
ASR Aggregate Purchase Price	$ 2,650		$ 2,650
ASR Shares Repurchased			18,600,000
ASR, Initial Price Paid Per Share			$ 121.24
ASR, Reduction to Shareowner's Equity	$ 0	$ 335	$ 3,000	$ 670
Accelerated Stock Repurchase [Member]
ASR amount included in APIC to be reclassified to treasury stock			$ 398