Financial Instruments (Details 3) - USD ($) $ in Millions	3 Months Ended
Mar. 31, 2016	Dec. 31, 2015
Financial Instruments:
Fair value of derivative instruments under collateralized arrangements in a liability position	$ 166	$ 28
Collateral posted on derivative instruments	0	0
Fair Values of Derivative Instruments
Fair value of total derivative instruments, Assets	1,129	994
Fair value of total derivative liabilities and debt	$ 9,794	8,131
Maximum spread on credit default swap agreements before full collateralization is required	2.50%
Liabilities included in master netting arrangements	$ 270	139
Obligation to return cash collateral	131	90
Net exposure related to derivative assets recorded in the Statement of Financial Position	657	726
Net exposure related to derivative liabilities recorded in the Statement of Financial Position	191	47
Cash collateral rehypothecated	0	0
U.S. Treasury securities
Fair Values of Derivative Instruments
Non-cash collateral received	71	40
Designated as hedging instruments
Fair Values of Derivative Instruments
Fair value of total derivative instruments, Assets	960	858
Fair value of total derivative instruments, Liabilities	374	92
Derivative instruments not designated as hedging instruments
Fair Values of Derivative Instruments
Fair value of total derivative instruments, Assets	170	136
Fair value of total derivative instruments, Liabilities	87	94
Other receivables
Fair Values of Derivative Instruments
Cash collateral issued, derivatives	0	0
Accounts payable
Fair Values of Derivative Instruments
Obligation to return cash collateral	131	90
Prepaid expenses and other current assets \| Foreign exchange contracts \| Designated as hedging instruments
Fair Values of Derivative Instruments
Fair value of total derivative instruments, Assets	37	197
Prepaid expenses and other current assets \| Foreign exchange contracts \| Derivative instruments not designated as hedging instruments
Fair Values of Derivative Instruments
Fair value of total derivative instruments, Assets	81	90
Prepaid expenses and other current assets \| Equity contracts \| Derivative instruments not designated as hedging instruments
Fair Values of Derivative Instruments
Fair value of total derivative instruments, Assets	48	6
Investments and sundry assets \| Interest rate contracts \| Designated as hedging instruments
Fair Values of Derivative Instruments
Fair value of total derivative instruments, Assets	876	656
Investments and sundry assets \| Foreign exchange contracts \| Designated as hedging instruments
Fair Values of Derivative Instruments
Fair value of total derivative instruments, Assets	47	5
Investments and sundry assets \| Foreign exchange contracts \| Derivative instruments not designated as hedging instruments
Fair Values of Derivative Instruments
Fair value of total derivative instruments, Assets	41	40
Other accrued expenses and liabilities \| Foreign exchange contracts \| Designated as hedging instruments
Fair Values of Derivative Instruments
Fair value of total derivative instruments, Liabilities	363	70
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	79	75
Other accrued expenses and liabilities \| Equity contracts \| Derivative instruments not designated as hedging instruments
Fair Values of Derivative Instruments
Fair value of total derivative instruments, Liabilities	1	19
Other liabilities \| Interest rate contracts \| Designated as hedging instruments
Fair Values of Derivative Instruments
Fair value of total derivative instruments, Liabilities		3
Other liabilities \| Foreign exchange contracts \| Designated as hedging instruments
Fair Values of Derivative Instruments
Fair value of total derivative instruments, Liabilities	11	19
Other liabilities \| Foreign exchange contracts \| Derivative instruments not designated as hedging instruments
Fair Values of Derivative Instruments
Fair value of total derivative instruments, Liabilities	7
Long term debt \| Designated as hedging instruments \| Net investment hedge
Fair Values of Derivative Instruments
Debt designated as hedging instrument	8,947	$ 7,945
Short term debt \| Designated as hedging instruments \| Net investment hedge
Fair Values of Derivative Instruments
Debt designated as hedging instrument	$ 386

This item represents the amount of cash collateral rehypothecated as of the balance sheet date.

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The credit default swap spread which, if exceeded, would trigger contingent features of these agreements.

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The aggregate fair value of assets that are already posted, at the end of the reporting period, as collateral for derivative instruments with credit-risk-related contingent features.

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Fair value portion of debt instrument payable, including, but not limited to, notes payable and loans payable.

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Fair value, before effects of master netting arrangements, of a financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes assets not subject to a master netting arrangement and elected not to be offset.

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Fair value, after the effects of master netting arrangements, of a financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes assets not subject to a master netting arrangement and not elected to be offset.

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Amount of obligation to return cash collateral under master netting arrangements that have not been offset against derivative assets.

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Amount of obligation to return securities collateral under master netting arrangements that have not been offset against derivative assets.

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Amount of right to receive cash collateral under master netting arrangements that have not been offset against derivative liabilities.

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Fair value, before effects of master netting arrangements, of a financial liability or contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes liabilities not subject to a master netting arrangement and elected not to be offset.

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Fair value of financial liability or contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset, elected not to be offset, deducted from derivative liabilities.

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The aggregate fair value amounts of derivative instruments that contain credit-risk-related contingent features that are in a net liability position at the end of the reporting period. For nonderivative instruments that are designated and qualify as hedging instruments, the fair value amounts are the carrying value of the nonderivative hedging instrument, including the adjustment for the foreign currency transaction gain (loss) on that instrument.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Fair value of financial obligations, including, but not limited to, debt instruments, derivative liabilities, federal funds purchased and sold under agreements to repurchase, securities loaned or sold under agreements to repurchase, financial instruments sold not yet purchased, guarantees, line of credit, loans and notes payable, servicing liability, and trading liabilities.

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