Reconciliation of Net Income to Net Income Available to Common Shareholders (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Millions		3 Months Ended
		Mar. 31, 2019	Mar. 31, 2018
Net Income (Loss) Attributable to Parent		$ 580	$ 643	[1]
Dividends, Preferred Stock, Cash	[2]	(26)	(31)
Net Income (Loss) Available to Common Stockholders, Basic		$ 554	$ 612
Weighted Average Number of Shares Outstanding, Basic		443,566	468,723
Weighted Average Number of Shares Outstanding, Diluted		446,662	473,620
Earnings Per Share, Diluted		$ 1.24	$ 1.29
Earnings Per Share, Basic		$ 1.25	$ 1.31
Restricted Stock Units (RSUs) [Member]
Dilutive securities		2,600	2,800
Warrants, options, and restricted stock [Member]
Dilutive securities		500	2,100

[1] During the second quarter of 2018, certain of the Company's business banking clients were transferred from the Wholesale business segment to the Consumer business segment. For all periods prior to the second quarter of 2018, the corresponding financial results have been transferred to the Consumer business segment for comparability purposes.

[2] For the three months ended March 31, 2019, dividends were $1,000 per share for both Series A and B Preferred Stock, $1,406 per share for Series F Preferred Stock, $1,263 per share for Series G Preferred Stock, and $1,281 per share for Series H Preferred Stock.For the three months ended March 31, 2018, dividends were $1,000 per share for both Series A and B Preferred Stock, $1,469 per share for Series E Preferred Stock, $1,406 per share for Series F Preferred Stock, $1,038 per share for Series G Preferred Stock, and $1,281 per share for Series H Preferred Stock.