Fair Value of Assets and Liabilities (Details 6) (USD $) In Millions, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012	Sep. 30, 2012	Dec. 31, 2011
Financial assets
Mortgage loans	$ 4,264	$ 5,943
Assets held for sale	15,577
Financial liabilities
Notes due to related parties	286	496
Liability for collateral	363	561	503	263
Liabilities held for sale	14,908
Carrying value
Financial assets
Mortgage loans	4,264	5,943
Cost method limited partnerships	603	617
Agent Loans	328	319
Bank loans	167	282
Notes due from related party	275	275
Assets held for sale	1,497
Financial liabilities
Contract holder funds on investment contracts	15,670	26,984
Notes due to related parties	286	496
Liability for collateral	363	561
Liabilities held for sale	7,704
Fair Value
Financial assets
Mortgage loans	4,409	6,223
Cost method limited partnerships	787	778
Agent Loans	319	314
Bank loans	168	282
Notes due from related party	275	275
Assets held for sale	1,573
Financial liabilities
Contract holder funds on investment contracts	16,199	27,989
Notes due to related parties	286	496
Liability for collateral	363	561
Liabilities held for sale	$ 7,550