Goodwill and Identifiable Intangible Assets (Details 1) (USD $) In Millions, unless otherwise specified	6 Months Ended
Jun. 30, 2011	Dec. 31, 2010
Identifiable Intangible Assets
Gross carrying amount	$ 3,530	$ 3,576
Accumulated amortization	(1,666)	(1,549)
Net carrying amount	1,864	2,027
Identifiable intangible assets approximate weighted average remaining life in years	12
Customer lists [Member]
Identifiable Intangible Assets
Gross carrying amount	1,104	1,104
Accumulated amortization	(561)	(529)
Net carrying amount	543	575
Identifiable intangible assets approximate weighted average remaining life in years	10
Commodities-related intangibles [Member]
Identifiable Intangible Assets
Gross carrying amount	633	667
Accumulated amortization	(100)	(52)
Net carrying amount	533	615
Identifiable intangible assets approximate weighted average remaining life in years	20
Broadcast royalties [Member]
Identifiable Intangible Assets
Gross carrying amount	560	560
Accumulated amortization	(92)	(61)
Net carrying amount	468	499
Identifiable intangible assets approximate weighted average remaining life in years	8
Insurance-related intangibles [Member]
Identifiable Intangible Assets
Gross carrying amount	292	292
Accumulated amortization	(146)	(146)
Net carrying amount	146	146
Identifiable intangible assets approximate weighted average remaining life in years	7
Other [Member]
Identifiable Intangible Assets
Gross carrying amount	941	953
Accumulated amortization	(767)	(761)
Net carrying amount	$ 174	$ 192
Identifiable intangible assets approximate weighted average remaining life in years	13

The accumulated amount of amortization of a major finite-lived intangible asset class. A major class is composed of intangible assets that can be grouped together because they are similar, either by their nature or by their use in the operations of a company.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 142
-Paragraph 45
-Subparagraph a(1)

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- Definition

Sum of the gross carrying amounts before accumulated amortization as of the balance sheet date of all intangible assets having statutory or estimated useful lives. The aggregate gross carrying amount (including any previously recognized impairment charges) of a major finite-lived intangible asset class. A major class is composed of intangible assets that can be grouped together because they are similar, either by their nature or by their use in the operations of a company.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 142
-Paragraph 45
-Subparagraph a(1)

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- Definition

The aggregate sum of gross carrying value of a major finite-lived intangible asset class, less accumulated amortization and any impairment charges. A major class is composed of intangible assets that can be grouped together because they are similar, either by their nature or by their use in the operations of a company.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 142
-Paragraph 45
-Subparagraph a(1)

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- Definition

The calculated weighted-average useful life of all finite-lived intangible assets.

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- Details

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