Changes in Shareholders' Equity (Details 1) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Changes in Minority Equity presented outside of Shareholders' Equity
Balance at beginning of period	$ 577
Amortization of prior service cost and unrecognized gains and losses included in total benefit cost, net of tax	32	61
Decrease (increase) in net actuarial losses, net of tax	19	97
Immediate recognition of prior service cost and unrecognized gains and losses due to curtailments, settlements, and divestitures, net of tax	42	0
Deferred derivative gains (losses), net of tax	(2)	4
Total comprehensive income (loss)	29	(15)
Balance at end of period	600
Changes in Minority Equity presented outside of Shareholders' Equity (Textuals) [Abstract]
Tax on foreign currency translation	0	0
Tax on amortization of prior service cost and unrecognized gains and losses included in total benefit cost	(2)	(4)
Tax on decrease (increase) in net actuarial losses	0	0
Tax on immediate recognition of prior service cost and unrecognized gains and losses due to curtailments, settlements and divestitures	0	0
Tax on deferred derivative gains (losses)	0	0
Non-Controlling Interest, Redeemable
Changes in Minority Equity presented outside of Shareholders' Equity
Balance at beginning of period	577	534
Net income (loss)	6	(8)
Foreign currency translation, net of tax	1	(15)
Amortization of prior service cost and unrecognized gains and losses included in total benefit cost, net of tax	1	2
Decrease (increase) in net actuarial losses, net of tax	11	1
Immediate recognition of prior service cost and unrecognized gains and losses due to curtailments, settlements, and divestitures, net of tax	4	0
Deferred derivative gains (losses), net of tax	0	1
Other comprehensive income (loss)	17	(11)
Total comprehensive income (loss)	23	(19)
Balance at end of period	600	515
Changes in Minority Equity presented outside of Shareholders' Equity (Textuals) [Abstract]
Tax on foreign currency translation	0	0
Tax on amortization of prior service cost and unrecognized gains and losses included in total benefit cost	0	0
Tax on decrease (increase) in net actuarial losses	0	0
Tax on immediate recognition of prior service cost and unrecognized gains and losses due to curtailments, settlements and divestitures	0	0
Tax on deferred derivative gains (losses)	$ 0	$ 0