INVESTMENTS - Investments in Variable Interest Entities (Detail) (USD $) In Millions, unless otherwise specified	Mar. 31, 2012	Dec. 31, 2011
Variable Interest Entity, Consolidated
Schedule of Equity Method Investments [Line Items]
Amortized Cost	$ 6,545	$ 6,997
Fair Value	6,940	7,206
Variable Interest Entity, Not Consolidated
Schedule of Equity Method Investments [Line Items]
Amortized Cost	12,795	13,753
Fair Value	12,832	13,714
Variable Interest Entities
Schedule of Equity Method Investments [Line Items]
Amortized Cost	19,340	20,750
Fair Value	$ 19,772	$ 20,920