Income Taxes (Tax Reconciliations) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Reconciliation of the beginning and ending amounts of unrecognized tax benefits
Balance at January 1,	$ 3,106	$ 2,932
Additions for tax positions of current year	79	181
Reductions for tax positions of the current year	(1)	(9)
Additions for tax positions of prior years	657	522
Reductions for tax positions of prior years	(617)	(377)
Settlements with tax authorities	(1)	(141)
Expiration on the statute of limitations	0	(2)
Balance at December 31,	3,223	3,106	2,932
Interest on tax deficiencies	11	(20)	(254)
Income tax penalties	$ 6	$ 22	$ (8)
Reconciliation of U.S. Federal Statutory Income Tax Rate to Actual Income Tax Rate
U.S. federal statutory income tax rate	35.00%	35.00%	35.00%
Tax on global activities including exports	(45.00%)	(18.40%)	(14.70%)
U.S. business credits	(4.60%)	(4.30%)	(4.70%)
All other - net	1.00%	(1.50%)	(3.50%)
Total income tax reconciliation items	(48.60%)	(28.40%)	(22.90%)
Actual income tax rate	(13.60%)	6.60%	12.10%
Effective Income Tax Rate Reconciliation, Disposition of Business	0.00%	(4.20%)	0.00%
Cembra [Member]
Reconciliation of U.S. Federal Statutory Income Tax Rate to Actual Income Tax Rate
U.S. business credits	(13.30%)