Changes in Shareholders' Equity (Details 1) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 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	25	59	57	120
Decrease (increase) in net actuarial losses, net of tax	5	27	24	124
Immediate recognition of prior service cost and unrecognized gains and losses due to curtailments, settlements, and divestitures, net of tax	0	1	42	1
Deferred derivative gains (losses), net of tax	1	2	(1)	6
Reclassification adjustment for amounts recognized in income, net of tax	0	1	1	1
Total comprehensive income (loss)	22	2	51	(13)
Balance at end of period	613		613
Changes in Minority Equity presented outside of Shareholders' Equity (Textuals) [Abstract]
Tax on foreign currency translation	0	0	0	0
Tax on amortization of prior service cost and unrecognized gains and losses included in total benefit cost	1	3	3	7
Tax on decrease (increase) in net actuarial losses	3	2	3	2
Tax on immediate recognition of prior service cost and unrecognized gains and losses due to curtailments, settlements and divestitures	0	0	0	0
Tax on deferred derivative gains (losses)	(1)	1	(1)	1
Tax on reclassification adjustment for amounts recognized in income	0	1	0	1
Minority Shareholders' Equity - Redeemable
Changes in Minority Equity presented outside of Shareholders' Equity
Balance at beginning of period	600	515	577	534
Net income (loss)	13	(5)	19	(13)
Foreign currency translation, net of tax	(3)	7	(2)	(8)
Amortization of prior service cost and unrecognized gains and losses included in total benefit cost, net of tax	1	2	2	4
Decrease (increase) in net actuarial losses, net of tax	1	1	12	2
Immediate recognition of prior service cost and unrecognized gains and losses due to curtailments, settlements, and divestitures, net of tax	0	0	4	0
Deferred derivative gains (losses), net of tax	0	0	0	1
Reclassification adjustment for amounts recognized in income, net of tax	1	0	1	0
Other comprehensive income (loss)	0	10	17	(1)
Total comprehensive income (loss)	13	5	36	(14)
Balance at end of period	613	520	613	520
Changes in Minority Equity presented outside of Shareholders' Equity (Textuals) [Abstract]
Tax on foreign currency translation	0	0	0	0
Tax on amortization of prior service cost and unrecognized gains and losses included in total benefit cost	0	0	0	0
Tax on decrease (increase) in net actuarial losses	0	0	0	0
Tax on immediate recognition of prior service cost and unrecognized gains and losses due to curtailments, settlements and divestitures	0	0	0	0
Tax on deferred derivative gains (losses)	0	0	0	0
Tax on reclassification adjustment for amounts recognized in income	$ 0	$ 0	$ 0	$ 0