Goodwill and Other Intangible Assets (Gross Carrying Value, Accumulated Amortization and Net Carrying Value of Other Intangible Assets) (Details) (USD $) In Millions	Dec. 31, 2010	Dec. 31, 2009
Gross Carrying Value	$ 4,260	$ 3,419
Accumulated Amortization	(1,350)	(1,038)
Net Carrying Value	2,910	2,381
Customer Contracts and Membership Lists [Member]
Gross Carrying Value	3,623	2,864
Accumulated Amortization	(1,038)	(796)
Net Carrying Value	2,585	2,068
Patents, Trademarks and Technology [Member]
Gross Carrying Value	505	437
Accumulated Amortization	(246)	(187)
Net Carrying Value	259	250
Other [Member]
Gross Carrying Value	132	118
Accumulated Amortization	(66)	(55)
Net Carrying Value	$ 66	$ 63

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)

+ Details

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Period Type:	instant

- 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)

+ Details

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Data Type:	xbrli:monetaryItemType
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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)

+ Details

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Data Type:	xbrli:monetaryItemType
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Period Type:	instant