Components of Net Periodic Benefit Cost (Detail) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013		Dec. 31, 2012		Dec. 31, 2011
Defined Benefit Plan, Recognized Net Gain (Loss) Due to Curtailments	$ 0		$ 0		$ (88)
Pension Plans, Defined Benefit
Defined Benefit Plan, Service Cost	0		0		62
Defined Benefit Plan, Interest Cost	113		119		128
Defined Benefit Plan, Expected Return on Plan Assets	(187)		(173)		(188)
Defined Benefit Plan, Amortization of Prior Service Cost (Credit)	0		0		(16)
Defined Benefit Plan, Amortization of Gains (Losses)	(26)		(25)		(39)
Defined Benefit Plan, Recognized Net Gain (Loss) Due to Curtailments	0		0		(88)
Defined Benefit Plan, Recognized Net Gain (Loss) Due to Settlements	0		2		0
Net periodic benefit cost	(48)		(27)		(63)
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Discount Rate	4.08%		4.63%	[1]	5.59%	[2]
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Expected Long-term Return on Assets	7.00%		7.00%		7.72%	[3]
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Rate of Compensation Increase					4.00%
Other Postretirement Benefit Plans, Defined Benefit
Defined Benefit Plan, Service Cost	0		0		0
Defined Benefit Plan, Interest Cost	6		7		9
Defined Benefit Plan, Expected Return on Plan Assets	(6)		(7)		(7)
Defined Benefit Plan, Amortization of Prior Service Cost (Credit)	0		0		0
Defined Benefit Plan, Amortization of Gains (Losses)	0		0		(1)
Defined Benefit Plan, Recognized Net Gain (Loss) Due to Curtailments	0		0		0
Defined Benefit Plan, Recognized Net Gain (Loss) Due to Settlements	0		0		0
Net periodic benefit cost	$ 0		$ 0		$ 3
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Discount Rate	3.45%		4.10%		5.10%
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Expected Long-term Return on Assets	3.25%	[4]	4.06%	[4]	4.39%	[4]

[1] 1 Interim remeasurement was required on September 15, 2012, for the SunTrust SERP to reflect settlement accounting.

[2] 2 Interim remeasurement was required on November 14, 2011 due to plan amendments adopted at that time. The discount rate as of the remeasurement date was selected based on economic conditions on that date.

[3] 3As part of the interim remeasurement on November 14, 2011, the expected return on plan assets was reduced from 7.75% to 7.25% for the SunTrust Pension Plan and the NCF Retirement Plan.

[4] 4 The weighted average shown for the Other Postretirement Benefit plan is determined on an after-tax basis.