Income Taxes (Tables)

3 Months Ended

Mar. 31, 2016

Income Tax Disclosure [Abstract]

Unrecognized tax benefits

UNRECOGNIZED TAX BENEFITS
(In millions)	March 31, 2016		December 31, 2015
Unrecognized tax benefits	$	6,557	$	6,778
Portion that, if recognized, would reduce tax expense and effective tax rate(a)		4,406		4,723
Accrued interest on unrecognized tax benefits		890		805
Accrued penalties on unrecognized tax benefits		118		98
Reasonably possible reduction to the balance of unrecognized tax benefits
in succeeding 12 months		0-1,400		0-700
Portion that, if recognized, would reduce tax expense and effective tax rate(a)		0-800		0-200

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