Income Taxes (Tables)

3 Months Ended

Mar. 31, 2014

Income Tax Disclosure [Abstract]

Unrecognized tax benefits

Unrecognized Tax Benefits
(In millions)	March 31, 2014		December 31, 2013
Unrecognized tax benefits	$	5,911	$	5,816
Portion that, if recognized, would reduce tax
expense and effective tax rate(a)		4,223		4,307
Accrued interest on unrecognized tax benefits		970		975
Accrued penalties on unrecognized tax benefits		169		164
Reasonably possible reduction to the balance of
unrecognized tax benefits in succeeding 12 months		0-1,150		0-900
Portion that, if recognized, would reduce tax
expense and effective tax rate(a)		0-400		0-350

(a)       Some portion of such reduction may be reported as discontinued operations.