Income Taxes (Summary Of Tax Credit Carryforwards) (Details) (USD $) In Millions, unless otherwise specified	Dec. 31, 2014
Tax Credit Carryforward [Line Items]
Tax Effected	$ 1,246
U.S. tax losses
Tax Credit Carryforward [Line Items]
Gross Tax Loss	76
Tax Effected	26
Foreign tax credits
Tax Credit Carryforward [Line Items]
Gross Tax Loss	0
Tax Effected	686
General business credits
Tax Credit Carryforward [Line Items]
Gross Tax Loss	0
Tax Effected	174
Minimum tax credits
Tax Credit Carryforward [Line Items]
Gross Tax Loss	0
Tax Effected	100
State tax losses
Tax Credit Carryforward [Line Items]
Gross Tax Loss	1,502
Tax Effected	41
State tax credits
Tax Credit Carryforward [Line Items]
Gross Tax Loss	0
Tax Effected	27
China tax losses
Tax Credit Carryforward [Line Items]
Gross Tax Loss	212
Tax Effected	53
Japan tax losses
Tax Credit Carryforward [Line Items]
Gross Tax Loss	93
Tax Effected	33
Germany tax losses
Tax Credit Carryforward [Line Items]
Gross Tax Loss	108
Tax Effected	31
United Kingdom tax losses
Tax Credit Carryforward [Line Items]
Gross Tax Loss	102
Tax Effected	21
Singapore tax losses
Tax Credit Carryforward [Line Items]
Gross Tax Loss	50
Tax Effected	8
Other subsidiaries tax losses
Tax Credit Carryforward [Line Items]
Gross Tax Loss	70
Tax Effected	18
Spain tax credits
Tax Credit Carryforward [Line Items]
Gross Tax Loss	0
Tax Effected	27
Other subsidiaries tax credits
Tax Credit Carryforward [Line Items]
Gross Tax Loss	0
Tax Effected	$ 1