Consolidated Statements Of Shareholders' Equity (Minority Equity) (USD $) In Millions, unless otherwise specified	Total	Minority Shareholders' Equity - Redeemable
Balance at beginning of year at Dec. 31, 2011		$ 607
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)		(10)
Foreign currency translation (net of tax)	83	18
Amortization of prior service cost and unrecognized gains and losses included in total benefit cost (net of tax)	209	6
Decrease (increase) in net actuarial losses (net of tax)	(979)	(81)
Immediate recognition of prior service cost and unrecognized gains and losses due to curtailments, settlements and divestitures (net of tax)	11	2
Prior service credit (cost) from plan amendments (net of tax)	73	1
Deferred derivative gains (losses) (net of tax)	(5)	(1)
Reclassification adjustment for amounts recognized in income (net of tax)	(11)	(4)
Other comprehensive income (loss)		(59)
Total comprehensive income (loss)	(20)	(69)
Dividends declared to minority shareholders		(4)
Balance at end of year at Dec. 31, 2012		534
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)		1
Foreign currency translation (net of tax)	(151)	23
Amortization of prior service cost and unrecognized gains and losses included in total benefit cost (net of tax)	232	8
Decrease (increase) in net actuarial losses (net of tax)	519	21
Immediate recognition of prior service cost and unrecognized gains and losses due to curtailments, settlements and divestitures (net of tax)	2	0
Prior service credit (cost) from plan amendments (net of tax)	31	1
Deferred derivative gains (losses) (net of tax)	1	0
Reclassification adjustment for amounts recognized in income (net of tax)	2	0
Other comprehensive income (loss)		53
Total comprehensive income (loss)	78	54
Dividends declared to minority shareholders		(11)
Balance at end of year at Dec. 31, 2013	577	577
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)		46
Foreign currency translation (net of tax)	(298)	(74)
Amortization of prior service cost and unrecognized gains and losses included in total benefit cost (net of tax)	79	5
Decrease (increase) in net actuarial losses (net of tax)	(82)	30
Immediate recognition of prior service cost and unrecognized gains and losses due to curtailments, settlements and divestitures (net of tax)	35	4
Prior service credit (cost) from plan amendments (net of tax)	0	0
Deferred derivative gains (losses) (net of tax)	16	3
Reclassification adjustment for amounts recognized in income (net of tax)	1	1
Other comprehensive income (loss)		(31)
Total comprehensive income (loss)	20	15
Dividends declared to minority shareholders		(10)
Balance at end of year at Dec. 31, 2014	$ 582	$ 582