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Financial Instruments Derivatives Not Designated as Hedging, Fair Value Table (Details) - USD ($)
$ in Millions

Dec. 31, 2017

Dec. 31, 2016

Derivatives Not Designated as Hedging Instruments, Fair Value [Line Items]

Derivative contracts, at fair value (Note 6)

$ 1,275

$ 1,139

Not designated as hedging instrument | Other assets

Derivatives Not Designated as Hedging Instruments, Fair Value [Line Items]

Asset derivatives, Gross

^[1]

7

34

Derivative, Fair Value, Amount Offset Against Collateral, Net

^[1],[2]

(7)

(15)

Derivative contracts, at fair value(1)

^[1]

0

19

Not designated as hedging instrument | Accrued expenses and other liabilities

Derivatives Not Designated as Hedging Instruments, Fair Value [Line Items]

Liability derivatives, Gross

1,282

1,154

Derivative, Fair Value, Amount Offset Against Collateral, Net

^[2]

(7)

(15)

Derivative contracts, at fair value (Note 6)

1,275

1,139

Not designated as hedging instrument | Equity contracts | Other assets

Derivatives Not Designated as Hedging Instruments, Fair Value [Line Items]

Asset derivatives, Gross

^[1]

0

15

Not designated as hedging instrument | Equity contracts | Accrued expenses and other liabilities

Derivatives Not Designated as Hedging Instruments, Fair Value [Line Items]

Liability derivatives, Gross

1,159

1,104

Not designated as hedging instrument | Credit contracts | Other assets

Derivatives Not Designated as Hedging Instruments, Fair Value [Line Items]

Asset derivatives, Gross

^[1]

0

17

Not designated as hedging instrument | Credit contracts | Accrued expenses and other liabilities

Derivatives Not Designated as Hedging Instruments, Fair Value [Line Items]

Liability derivatives, Gross

17

39

Not designated as hedging instrument | Commodity contracts | Other assets

Derivatives Not Designated as Hedging Instruments, Fair Value [Line Items]

Asset derivatives, Gross

^[1]

7

2

Not designated as hedging instrument | Commodity contracts | Accrued expenses and other liabilities

Derivatives Not Designated as Hedging Instruments, Fair Value [Line Items]

Liability derivatives, Gross

106

11

Investment Segment

Derivatives Not Designated as Hedging Instruments, Fair Value [Line Items]

Collateral posted on certain derivative positions

$ 542

$ 634

[1]	Net asset derivatives are located within other assets in our consolidated balance sheets.
[2]	Excludes netting of cash collateral received and posted. The total collateral posted at December 31, 2017 and 2016 was $542 million and $634 million, respectively, across all counterparties.

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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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