Income Taxes (Summary Of Tax Credit Carryforwards) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2011
Tax Credit Carryforward [Line Items]
Gross Tax Loss
Tax Effected	1,438
U.S. Tax Losses [Member]
Tax Credit Carryforward [Line Items]
Gross Tax Loss	79
Tax Effected	28
Expiration Period	2018-2029
Foreign Tax Credits [Member]
Tax Credit Carryforward [Line Items]
Gross Tax Loss
Tax Effected	596
Expiration Period	2017-2019
General Business Credits [Member]
Tax Credit Carryforward [Line Items]
Gross Tax Loss
Tax Effected	259
Expiration Period	2023-2031
Minimum Tax Credits [Member]
Tax Credit Carryforward [Line Items]
Gross Tax Loss
Tax Effected	108
Expiration Period	Unlimited
State Tax Losses [Member]
Tax Credit Carryforward [Line Items]
Gross Tax Loss	1,326
Tax Effected	40
Expiration Period	2012-2031
State Tax Credits [Member]
Tax Credit Carryforward [Line Items]
Gross Tax Loss
Tax Effected	30
Expiration Period	2012-2026
China Tax Losses [Member]
Tax Credit Carryforward [Line Items]
Gross Tax Loss	529
Tax Effected	132
Expiration Period	2012-2016
Japan Tax Losses [Member]
Tax Credit Carryforward [Line Items]
Gross Tax Loss	109
Tax Effected	44
Expiration Period	2015-2020
United Kingdom Tax Losses [Member]
Tax Credit Carryforward [Line Items]
Gross Tax Loss	167
Tax Effected	42
Expiration Period	Unlimited
Germany Tax Losses [Member]
Tax Credit Carryforward [Line Items]
Gross Tax Loss	210
Tax Effected	61
Expiration Period	Unlimited
Singapore Tax Losses [Member]
Tax Credit Carryforward [Line Items]
Gross Tax Loss	86
Tax Effected	15
Expiration Period	Unlimited
Other Subsidiaries Tax Losses [Member]
Tax Credit Carryforward [Line Items]
Gross Tax Loss	68
Tax Effected	15
Expiration Period	Various
Spain Tax Credits [Member]
Tax Credit Carryforward [Line Items]
Gross Tax Loss
Tax Effected	29
Expiration Period	2018-2022
Other Subsidiaries Tax Credits [Member]
Tax Credit Carryforward [Line Items]
Gross Tax Loss
Tax Effected	$ 39
Expiration Period	Various