Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented.

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Reference 2: http://www.xbrl.org/2003/role/presentationRef

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-Name Accounting Standards Codification

-Glossary Diluted Earnings Per Share

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-Name Accounting Standards Codification

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-Name Accounting Standards Codification

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-Name Statement of Financial Accounting Standard (FAS)

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+ Details

Accounting Policies (Details Textual) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Variable Interest Entity [Line Items]
Assets	$ 3,225	$ 3,058
Liabilities	2,892	2,787
Accounting Policies (Textual) [Abstract]
Excess of fair value of assets over liabilities of managed investment entities				261
Weighted average common shares adjustment related to stock-based compensation	1.7	1.6	1.3
Anti-dilutive potential common shares related to stock-based compensation plans	1.8	2.3	3.5
Maturities of short term investments	3 months
New Collateralized Loan Obligation Entity Formed In Two Thousand Twelve [Member]
Variable Interest Entity [Line Items]
Assets	107
Liabilities	$ 87