v2.4.0.6
Derivative Instruments and Hedging Activities (Other Disclosures) (Details) (USD $)
In Millions, unless otherwise specified
 3 Months Ended 6 Months Ended 3 Months Ended
Jun. 30, 2012
Jun. 30, 2011
Jun. 30, 2012
Jun. 30, 2011
Dec. 31, 2011
Jun. 30, 2012
Net Investment Hedges
Mar. 31, 2012
Net Investment Hedges
Jun. 30, 2012
Not Designated as Accounting Hedges
Jun. 30, 2012
Baa1 Moody's/BBB+ S&P
Jun. 30, 2012
Baa2 Moody's/BBB S&P
Derivative [Line Items]                    
Discussion of interest rate fair value hedge effectiveness assessment and measurement     A hedging relationship is deemed effective if the fair values of the hedging instrument (derivative) and the hedged item (debt liability) change inversely within a range of 80% to 125%.              
Hedging Relationship Deemed Effective Range Lower Limit 80.00%   80.00%              
Hedging Relationship Deemed Effective Range Upper Limit 125.00%   125.00%              
Embedded derivatives, net fair value $ 25   $ 25   $ 53          
Embedded derivatives, notional amount 2,334   2,334   3,312          
Recognized gains (losses) related to changes in the fair value of bifurcated embedded derivatives (13) 21 (6) 2            
Amount of payables associated with cash collateral received that was netted against derivative assets 75,370   75,370   77,938          
Amount of receivables in respect of cash collateral paid that was netted against derivative liabilities 46,855   46,855   44,936          
Cash collateral receivables 110   110   268          
Cash collateral payables 47   47   9          
Net Investment Hedges                    
Pre-tax gain related to the reversal of amounts recorded in accumulated other comprehensive income due to the incorrect application of hedge accounting           300 191      
Pre-tax loss resulting from fair value changes of derivative positions not qualifying for net investment hedge accounting               224    
Credit Risk Related Contingencies                    
Aggregate fair value of derivative contracts that contain credit-risk-related contingent features that are in a net liability position 38,619   38,619              
Posted collateral 34,602   34,602              
Amount of additional collateral or termination payments that could be called by counterparties under the terms of such agreements in the event of a downgrade of the Company's long-term credit rating                 374 2,161
Amount of additional collateral or termination payments that could be called by counterparties under the terms of such agreements in the event of a downgrade of the Company's long-term credit rating, related to bilateral arrangements between the Company and other parties $ 1,947   $ 1,947