Income Taxes (Tables)

6 Months Ended

Jun. 30, 2015

Income Tax Disclosure [Abstract]

Unrecognized tax benefits

UNRECOGNIZED TAX BENEFITS
(in millions)	June 30, 2015		December 31, 2014
Unrecognized tax benefits	$	5,389	$	5,619
Portion that, if recognized, would reduce tax expense and effective tax rate(a)		3,920		4,059
Accrued interest on unrecognized tax benefits		835		807
Accrued penalties on unrecognized tax benefits		100		103
Reasonably possible reduction to the balance of unrecognized tax benefits
in succeeding 12 months		0-900		0-900
Portion that, if recognized, would reduce tax expense and effective tax rate(a)		0-350		0-300

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