Financing Receivables: (Details 4) (USD $) In Millions, unless otherwise specified	3 Months Ended
Mar. 31, 2013	Mar. 31, 2012	Dec. 31, 2012
Impaired client loan receivables
Recorded Investment	$ 155		$ 160
Related Allowance	142		143
Average Recorded Investment	158	162
Interest Income Recognized	0	0
Interest Income Recognized on Cash Basis	0	0
Major Markets
Impaired client loan receivables
Recorded Investment	70		88
Related Allowance	64		77
Average Recorded Investment	79	98
Interest Income Recognized	0	0
Interest Income Recognized on Cash Basis	0	0
Growth Markets
Impaired client loan receivables
Recorded Investment	86		72
Related Allowance	78		65
Average Recorded Investment	79	64
Interest Income Recognized	0	0
Interest Income Recognized on Cash Basis	$ 0	$ 0

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Average amount of investment of impaired financing receivables with related allowance for credit losses and without a related allowance for credit losses.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 310

-SubTopic 10

-Section 50

-Paragraph 15

-Subparagraph (c)(1)

-URI http://asc.fasb.org/extlink&oid=7512638&loc=d3e5212-111524

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 310

-SubTopic 10

-Section 50

-Paragraph 17

-URI http://asc.fasb.org/extlink&oid=7512638&loc=d3e5258-111524

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- Definition

Amount of interest income recognized that the financing receivables (with related allowance for credit losses and without a related allowance for credit losses) were impaired.

+ References

+ Details

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- Definition

Amount of interest income recognized on a cash-basis method of accounting that the financing receivables (with related allowance for credit losses and without a related allowance for credit losses) were impaired.

+ References

+ Details

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- Definition

Amount of investment of impaired financing receivables with related allowance for credit losses and without a related allowance for credit losses.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 310

-SubTopic 10

-Section 50

-Paragraph 14A

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=7512638&loc=SL6953550-111524

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- Definition

Amount of allowance for credit losses related to recorded investment.

+ References

+ Details

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