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Financial Instruments: (Details 3) (USD $) In Millions, unless otherwise specified
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9 Months Ended |
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Sep. 30, 2012
item
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Dec. 31, 2011
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| Financial Instruments: |
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| Derivative instruments with credit-risk related contingent features |
$ 109 |
$ 131 |
| Fair Values of Derivative Instruments |
|
|
| Fair value of total derivative instruments, Assets |
1,228 |
1,300 |
| Fair value of total derivative instruments, Liabilities |
2,771 |
2,415 |
| Maximum spread on credit default swap agreements before full overnight collateralization is required (in basis points) |
250 |
|
| Liabilities included in master netting arrangements |
245 |
324 |
| Total collateral received, derivatives |
376 |
466 |
| Non-cash collateral received and not recorded on the Statement of Financial Position |
28 |
|
| Amount recognized in accounts payable for the obligation to return cash collateral |
376 |
466 |
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Derivative instruments designated as hedging instruments
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|
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| Fair Values of Derivative Instruments |
|
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| Fair value of total derivative instruments, Assets |
1,027 |
1,190 |
| Fair value of total derivative instruments, Liabilities |
340 |
428 |
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Derivative instruments not designated as hedging instruments
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|
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| Fair Values of Derivative Instruments |
|
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| Fair value of total derivative instruments, Assets |
201 |
110 |
| Fair value of total derivative instruments, Liabilities |
59 |
103 |
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Prepaid expenses and other current assets | Interest rate contracts | Derivative instruments designated as hedging instruments
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|
|
| Fair Values of Derivative Instruments |
|
|
| Fair value of total derivative instruments, Assets |
51 |
50 |
|
Prepaid expenses and other current assets | Foreign exchange contracts | Derivative instruments designated as hedging instruments
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|
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| Fair Values of Derivative Instruments |
|
|
| Fair value of total derivative instruments, Assets |
184 |
407 |
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Prepaid expenses and other current assets | Foreign exchange contracts | Derivative instruments not designated as hedging instruments
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|
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| Fair Values of Derivative Instruments |
|
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| Fair value of total derivative instruments, Assets |
172 |
82 |
|
Prepaid expenses and other current assets | Equity contracts | Derivative instruments not designated as hedging instruments
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|
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| Fair Values of Derivative Instruments |
|
|
| Fair value of total derivative instruments, Assets |
11 |
7 |
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Investments and sundry assets | Interest rate contracts | Derivative instruments designated as hedging instruments
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|
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| Fair Values of Derivative Instruments |
|
|
| Fair value of total derivative instruments, Assets |
775 |
733 |
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Investments and sundry assets | Foreign exchange contracts | Derivative instruments designated as hedging instruments
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|
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| Fair Values of Derivative Instruments |
|
|
| Fair value of total derivative instruments, Assets |
17 |
|
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Investments and sundry assets | Foreign exchange contracts | Derivative instruments not designated as hedging instruments
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|
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| Fair Values of Derivative Instruments |
|
|
| Fair value of total derivative instruments, Assets |
18 |
21 |
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Other accrued expenses and liabilities | Foreign exchange contracts | Derivative instruments designated as hedging instruments
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|
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| Fair Values of Derivative Instruments |
|
|
| Fair value of total derivative instruments, Liabilities |
275 |
273 |
|
Other accrued expenses and liabilities | Foreign exchange contracts | Derivative instruments not designated as hedging instruments
|
|
|
| Fair Values of Derivative Instruments |
|
|
| Fair value of total derivative instruments, Liabilities |
38 |
84 |
|
Other accrued expenses and liabilities | Equity contracts | Derivative instruments not designated as hedging instruments
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|
|
| Fair Values of Derivative Instruments |
|
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| Fair value of total derivative instruments, Liabilities |
11 |
8 |
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Other liabilities. | Foreign exchange contracts | Derivative instruments designated as hedging instruments
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| Fair Values of Derivative Instruments |
|
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| Fair value of total derivative instruments, Liabilities |
65 |
155 |
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Other liabilities. | Foreign exchange contracts | Derivative instruments not designated as hedging instruments
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|
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| Fair Values of Derivative Instruments |
|
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| Fair value of total derivative instruments, Liabilities |
10 |
11 |
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Long term debt. | Derivative instruments designated as hedging instruments
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|
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| Fair Values of Derivative Instruments |
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| Fair value of total derivative instruments, Liabilities |
1,729 |
1,884 |
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Short term debt | Derivative instruments designated as hedging instruments
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| Fair Values of Derivative Instruments |
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| Fair value of total derivative instruments, Liabilities |
$ 643 |
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