Contingencies, Commitments and Guarantees (Insolvency Assessments) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2013
Loss Contingencies [Line Items]
Receivable for reimbursement of paid assessments	$ 21,634		$ 21,859
Other Assets:
Premium tax offset for future undiscounted assessments	60	114
Premium tax offsets currently available for paid assessments	69	14
Other Liabilities:
Insolvency assessments	93	205
Insurance-related Assessments [Member]
Loss Contingencies [Line Items]
Receivable for reimbursement of paid assessments			5
Total assets held for insolvency assessments	$ 134	$ 134	$ 134