Segment Information (Reconciliation to Consolidated Income Statements) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Segment Information
Total segment PTOI	$ 2,248	$ 2,241
Non operating pension and other post retirement employee benefit costs	(30)	(147)
Net exchange (losses) gains, including affiliates	(96)	11
Corporate expenses	(217)	(214)
Interest expense	(103)	(117)
Income from continuing operations before income taxes	$ 1,802	$ 1,774