Stock-Based Compensation Expense Recognized in Noninterest Expense (Detail) - USD ($) $ in Millions		3 Months Ended
		Mar. 31, 2018	Mar. 31, 2017
Restricted Stock Unit Expense		$ 39	$ 34
Performance Stock Units Expense	[1]	17	24
Share-based Compensation		56	58
Employee Service Share-based Compensation, Tax Benefit from Compensation Expense	[2]	$ 13	$ 22

[1] Phantom stock units are settled in cash. The Company paid $75 million and $76 million during the three months ended March 31, 2018 and 2017, respectively, related to these share-based liabilities.

[2] Does not include excess tax benefits or deficiencies recognized in the Provision for income taxes in the Consolidated Statements of Income.