Securities Available for Sale (Detail) (USD $) In Millions	Jun. 30, 2011		Dec. 31, 2010
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	$ 24,614		$ 24,484
Unrealized Gains	2,645		2,534
Unrealized Losses	43		123
Fair Value	27,216		26,895
US Treasury Securities
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	730		5,446
Unrealized Gains	4		115
Unrealized Losses	8		45
Fair Value	726		5,516
US Government Agencies Debt Securities
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	2,519		1,883
Unrealized Gains	48		19
Unrealized Losses	1		7
Fair Value	2,566		1,895
US States and Political Subdivisions Debt Securities
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	499		565
Unrealized Gains	19		17
Unrealized Losses	2		3
Fair Value	516		579
Mortgage-backed Securities, Issued by US Government Sponsored Enterprises
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	18,797		14,014
Unrealized Gains	536		372
Unrealized Losses	2		28
Fair Value	19,331		14,358
Mortgage-backed Securities, Issued by Private Enterprises
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	335		378
Unrealized Gains	1		3
Unrealized Losses	25		34
Fair Value	311		347
Collateralized Debt Obligations
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	337		50
Fair Value	337		50
Asset-backed Securities
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	615		798
Unrealized Gains	14		15
Unrealized Losses	4		5
Fair Value	625		808
Corporate And Other Debt Securities
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	54		464
Unrealized Gains	3		19
Unrealized Losses	1		1
Fair Value	56		482
Equity Securities, Coca Cola
Schedule of Available-for-sale Securities [Line Items]
Unrealized Gains	2,019		1,973
Fair Value	2,019		1,973
Equity Securities, Other
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	728	[1]	886	[1]
Unrealized Gains	1	[1]	1	[1]
Fair Value	$ 729	[1]	$ 887	[1]

[1] At June 30, 2011, other equity securities included $205 million in FHLB of Atlanta stock (par value), $391 million in Federal Reserve Bank stock (par value), and $132 million in mutual fund investments (par value). At December 31, 2010, other equity securities included $298 million in FHLB of Atlanta stock (par value), $391 million in Federal Reserve Bank stock (par value), and $197 million in mutual fund investments (par value).