Income Taxes (Reconciliation Of The U.S. Statutory Income Tax Rate To Effective Tax Rate) (Details) (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended	12 Months Ended
	Mar. 31, 2010	Dec. 31, 2012		Dec. 31, 2011		Dec. 31, 2010
Income Taxes [Abstract]
Statutory U.S. income tax rate		35.00%		35.00%		35.00%
State income tax (benefit), net of federal effect		0.20%		0.10%		0.10%
Tax holidays		(1.60%)	[1]	(2.00%)	[1]	(3.10%)	[1]
Investment and other tax credits		(1.00%)	[2]	(0.70%)	[2]	(0.90%)	[2]
Rate difference on foreign earnings		(2.30%)	[3]	(4.20%)		(2.10%)
Equity earnings impact		(12.70%)	[4]	(14.90%)	[4]	(16.60%)	[4]
Dividend repatriation		0.40%		(0.80%)	[5]	(6.70%)	[6]
Deferred tax adjustment						1.50%	[7]
Valuation allowances		(0.10%)		0.50%		0.10%
Other items, net		0.50%		(0.30%)		0.20%
Effective income tax (benefit) rate		18.40%		12.70%		7.50%
Impact of tax holidays on net income per share on a diluted basis, per share		$ 0.02		$ 0.04		$ 0.08
Deferred tax asset write off related to OPEB subsidies						$ 56
Tax benefit for excess foreign tax credits	265					265
Tax expense reversed		$ 37

[1] Primarily related to a subsidiary in Taiwan operating under tax holiday arrangements. The nature and extent of such arrangements vary, and the benefits of existing arrangements phase out in future years (through 2015). The impact of tax holidays on net income per share on a diluted basis was $0.02 in 2012, $0.04 in 2011, and $0.08 in 2010

[2] Primarily related to investment tax credits in Taiwan, employment credits in Mexico and prior year research and development credits in U.S

[3] $37 million tax expense recorded in 2012 will be reversed in the first quarter of 2013 as a result of the retroactive application of the American Taxpayer Relief Act enacted on January 3, 2013

[4] Equity in earnings of nonconsolidated affiliates reported in the financials net of tax

[5] Includes benefit of amending 2006 U.S. Federal return to claim foreign tax credits

[6] In 2010, we recorded a $265 million tax benefit for excess foreign tax credits that resulted from the repatriation of current year earnings of certain foreign subsidiaries

[7] In 2010, we recorded a $56 million charge to write-off deferred tax associated with OPEB subsidy due to a law change