Summary of Significant Accounting Policies and Nature of Operations Summary of Significant Accounting Policies and Nature of Operations (Tables)

12 Months Ended

Dec. 31, 2015

Accounting Policies [Abstract]

Schedule of Reclassification Adjustments

The consolidated balance sheet as of December 31, 2014, changes in stockholder's equity as of December 31, 2013, consolidated statements of income and comprehensive income for the years ended December 31, 2014 and December 31, 2013, respectively, have been adjusted to reflect adoption of this guidance as follows:

	December 31, 2014
(Dollars in millions)	As Previously Reported		Adjustment			As Reported Under New Guidance
Other assets	$	4,685	$	(55	)	$	4,630
Other liabilities	1,889		8			1,897
Retained earnings	8,346		(63		)	8,283

	December 31, 2013
(Dollars in millions)	As Previously Reported	Adjustment		As Reported Under New Guidance
Retained earnings	7,512	(54	)	7,458

		December 31, 2014							December 31, 2013
(Dollars in millions)		As Previously Reported		Adjustment			As Reported Under New Guidance		As Previously Reported		Adjustment			As Reported Under New Guidance
Noninterest expense
	Other	$	359	$	(76	)	$	283	$	368	$	(64	)	$	304
Income before income taxes and including noncontrolling interests		1,080		76			1,156		844		64			908
Income tax expense		274		85			359		195		84			279
Net Income Attributable to MUAH		$	825	$	(9	)	$	816	$	667	$	(20	)	$	647