Variable Interest Entities (Asset & Liability Balances) (Details) - Consolidated investment entities [Member] - USD ($) $ in Millions	Dec. 31, 2015	Dec. 31, 2014
Assets
Other assets	$ 2,065	$ 1,936
Liabilities
Debt	6,630	6,030
Other liabilities	221	193
Recurring basis [Member] \| Level 1 [Member]
Assets
Investments:	78	134
Total assets at fair value	78	134
Recurring basis [Member] \| Level 1 [Member] \| Common stocks [Member]
Assets
Investments:	74	130
Recurring basis [Member] \| Level 1 [Member] \| Other investments [Member]
Assets
Investments:	4	4
Recurring basis [Member] \| Level 2 [Member]
Assets
Investments:	5,960	5,523
Receivables	70	49
Other assets		1
Total assets at fair value	6,030	5,573
Liabilities
Other liabilities	221	193
Total liabilities at fair value	221	193
Recurring basis [Member] \| Level 2 [Member] \| Corporate debt securities [Member]
Assets
Investments:	154	171
Recurring basis [Member] \| Level 2 [Member] \| Common stocks [Member]
Assets
Investments:	46	40
Recurring basis [Member] \| Level 2 [Member] \| Other investments [Member]
Assets
Investments:	22	25
Recurring basis [Member] \| Level 2 [Member] \| Syndicated loans [Member]
Assets
Investments:	5,738	5,287
Recurring basis [Member] \| Level 3 [Member]
Assets
Investments:	532	491
Other assets	2,065	1,935
Total assets at fair value	2,597	2,426
Liabilities
Debt	6,630	6,030
Total liabilities at fair value	6,630	6,030
Recurring basis [Member] \| Level 3 [Member] \| Common stocks [Member]
Assets
Investments:	3	7
Recurring basis [Member] \| Level 3 [Member] \| Syndicated loans [Member]
Assets
Investments:	529	484
Recurring basis [Member] \| Total [Member]
Assets
Investments:	6,570	6,148
Receivables	70	49
Other assets	2,065	1,936
Total assets at fair value	8,705	8,133
Liabilities
Debt	6,630	6,030
Other liabilities	221	193
Total liabilities at fair value	6,851	6,223
Recurring basis [Member] \| Total [Member] \| Corporate debt securities [Member]
Assets
Investments:	154	171
Recurring basis [Member] \| Total [Member] \| Common stocks [Member]
Assets
Investments:	123	177
Recurring basis [Member] \| Total [Member] \| Other investments [Member]
Assets
Investments:	26	29
Recurring basis [Member] \| Total [Member] \| Syndicated loans [Member]
Assets
Investments:	$ 6,267	$ 5,771

Fair value portion of amount due from customers or clients for goods or services, including trade receivables, that have been delivered or sold in the normal course of business, and amounts due from others, including related parties.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Trading Securities
-URI http://asc.fasb.org/extlink&oid=6526789

Reference 2: http://www.xbrl.org/2003/role/presentationRef
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Reference 4: http://www.xbrl.org/2003/role/presentationRef
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-Name Accounting Standards Codification
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-URI http://asc.fasb.org/extlink&oid=6505594

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