Schedule of Share-Based Compensation Plan Cost (Detail) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013		Dec. 31, 2012		Dec. 31, 2011
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation cost	$ 100	[1]	$ 57	[1]	$ 54	[1]
RSUs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation cost	88	[1]	37	[1]	18	[1]
Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation cost	11	[1]	13	[1]	12	[1]
Share-Based Awards Converted To Cash Awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation cost	1	[1]	6	[1]	19	[1]
Stock Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation cost			$ 1	[1]	$ 5	[1]

[1] All compensation cost is recorded to Salaries and related costs, with the exception of $9 million, $9 million and $17 million in 2013, 2012 and 2011, respectively, that was recorded in integration-related costs as a component of special charges.