Income Taxes (Summary Of Tax Credit Carryforwards) (Details) (USD $) In Millions, unless otherwise specified	Dec. 31, 2013
Tax Credit Carryforward [Line Items]
Tax Effected	$ 1,382
U.S. Tax Losses
Tax Credit Carryforward [Line Items]
Gross Tax Loss	64
Tax Effected	22
Foreign Tax Credits
Tax Credit Carryforward [Line Items]
Gross Tax Loss	0
Tax Effected	670
General Business Credits
Tax Credit Carryforward [Line Items]
Gross Tax Loss	0
Tax Effected	225
Minimum Tax Credits
Tax Credit Carryforward [Line Items]
Gross Tax Loss	0
Tax Effected	104
State Tax Losses
Tax Credit Carryforward [Line Items]
Gross Tax Loss	1,991
Tax Effected	50
State Tax Credits
Tax Credit Carryforward [Line Items]
Gross Tax Loss	0
Tax Effected	27
Canada Tax Losses
Tax Credit Carryforward [Line Items]
Gross Tax Loss	74
Tax Effected	20
China Tax Losses
Tax Credit Carryforward [Line Items]
Gross Tax Loss	226
Tax Effected	56
Japan Tax Losses
Tax Credit Carryforward [Line Items]
Gross Tax Loss	100
Tax Effected	36
United Kingdom Tax Losses
Tax Credit Carryforward [Line Items]
Gross Tax Loss	182
Tax Effected	36
Germany Tax Losses
Tax Credit Carryforward [Line Items]
Gross Tax Loss	150
Tax Effected	44
Singapore Tax Losses
Tax Credit Carryforward [Line Items]
Gross Tax Loss	58
Tax Effected	10
Other Subsidiaries Tax Losses
Tax Credit Carryforward [Line Items]
Gross Tax Loss	73
Tax Effected	18
Canada Tax Credits
Tax Credit Carryforward [Line Items]
Gross Tax Loss	0
Tax Effected	28
Spain Tax Credits
Tax Credit Carryforward [Line Items]
Gross Tax Loss	0
Tax Effected	31
Other Subsidiaries Tax Credits
Tax Credit Carryforward [Line Items]
Gross Tax Loss	0
Tax Effected	$ 5