Fair Value Inputs Average Correlation

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- Definition

Fair Value Inputs Average Credit Spreads

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- Definition

Fair Value Inputs Average Recovery Rate

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- Definition

Fair Value Inputs Average Spread

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- Definition

Fair Value Inputs Average Upfront Credit Points

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- Definition

Fair Value Inputs Average Volatility Rate

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No definition available.

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- Definition

Fair Value Inputs Median Correlation

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No definition available.

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- Definition

Fair Value Inputs Median Credit Spreads

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- Definition

Fair Value Inputs Median Recovery Rate

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No definition available.

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- Definition

Fair Value Inputs Median Spread

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Fair Value Inputs Median Upfront Credit Points

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- Definition

Fair Value Inputs Median Volatility Rate

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- Definition

Fair value unobservable inputs, spread per unit of natural gas and oil.

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- Definition

Fair Value Inputs, Upfront Credit Points.

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- Definition

Fair value measurement inputs disclosure.

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- Definition

Measure of dispersion, in percentage terms (for instance, the standard deviation or variance), for a given stock price.

+ References

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- Definition

Percentage of adjustment to the observed price for a similar asset or liability when an identical transaction does not exist, used as an input to measure fair value.

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- Definition

Risk associated with risk of default, credit spread risk and downgrade risk, expressed as a percentage, used as an input to measure fair value.

+ References

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- Definition

Rate at which loans or a loan portfolio are expected to prepay principal balances, used as an input to measure fair value.

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- Definition

Fair value of financial instrument classified as derivative asset (liability) after deduction of derivative liability (asset), measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=66048111&loc=d3e19207-110258

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 3
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=66048111&loc=d3e19279-110258

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Derivatives and Hedging Activities - Fair Value, Derivatives, Measurement Inputs, Disclosure (Detail) $ in Millions	3 Months Ended	12 Months Ended
	Mar. 31, 2017 USD ($) $ / Bbls $ / MMBTU	Dec. 31, 2016 USD ($) $ / Bbls $ / MMBTU	Mar. 31, 2016 USD ($)	Jan. 01, 2016 USD ($)
Fair Value Measurement Inputs Disclosure [Line Items]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Derivative Contracts Net Value, Ending Balance	$ 97	$ (1,217)	$ 55	$ 495
Interest Rate Contract [Member]
Fair Value Measurement Inputs Disclosure [Line Items]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Derivative Contracts Net Value, Ending Balance	$ (282)	$ (381)	(383)	(398)
Fair Value Unobservable Inputs, Average Correlation	56.00%	56.00%
Fair Value Unobservable Inputs, Median Correlation	60.00%	60.00%
Fair Value Unobservable Input, Average Volatility	0.84%	0.84%
Fair Value Unobservable Input, Median Volatility	0.57%	0.57%
Credit Risk Contract [Member]
Fair Value Measurement Inputs Disclosure [Line Items]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Derivative Contracts Net Value, Ending Balance	$ 2,239	$ 2,504	2,821	2,793
Fair Value Unobservable Inputs, Average Correlation	67.00%	65.00%
Fair Value Unobservable Inputs, Median Correlation	70.00%	68.00%
Fair Value Unobservable Inputs, Average Credit spreads	0.88%	1.22%
Fair Value Unobservable Inputs, Median Credit spreads	0.49%	0.73%
Fair Value Unobservable Inputs, Average Upfront Credit Points	0.41%	0.43%
Fair Value Unobservable Inputs, Median Upfront Credit Points	0.35%	0.35%
Fair Value Unobservable Inputs, Average Recovery rates	59.00%	58.00%
Fair Value Unobservable Inputs, Median Recovery rates	65.00%	70.00%
Foreign Exchange Contract [Member]
Fair Value Measurement Inputs Disclosure [Line Items]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Derivative Contracts Net Value, Ending Balance	$ 24	$ 3	9	(34)
Fair Value Unobservable Inputs, Average Correlation	50.00%	50.00%
Fair Value Unobservable Inputs, Median Correlation	55.00%	55.00%
Commodity Contract [Member]
Fair Value Measurement Inputs Disclosure [Line Items]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Derivative Contracts Net Value, Ending Balance	$ 78	$ 73	(291)	(262)
Fair Value Unobservable Input, Average Volatility	29.00%	33.00%
Fair Value Unobservable Input, Median Volatility	28.00%	33.00%
Commodity Contract [Member] \| Natural Gas [Member]
Fair Value Measurement Inputs Disclosure [Line Items]
Fair Value Unobservable Inputs, Average Spread \| $ / MMBTU	(0.22)	(0.14)
Fair Value Unobservable Inputs, Median Spread \| $ / MMBTU	(0.13)	(0.05)
Commodity Contract [Member] \| Oil [Member]
Fair Value Measurement Inputs Disclosure [Line Items]
Fair Value Unobservable Inputs, Average Spread \| $ / Bbls	7.62	25.30
Fair Value Unobservable Inputs, Median Spread \| $ / Bbls	(0.41)	16.43
Equity Contract [Member]
Fair Value Measurement Inputs Disclosure [Line Items]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Derivative Contracts Net Value, Ending Balance	$ (1,962)	$ (3,416)	$ (2,101)	$ (1,604)
Fair Value Unobservable Inputs, Average Correlation	42.00%	41.00%
Fair Value Unobservable Inputs, Median Correlation	41.00%	41.00%
Fair Value Unobservable Input, Average Volatility	23.00%	24.00%
Fair Value Unobservable Input, Median Volatility	22.00%	23.00%
Minimum [Member] \| Interest Rate Contract [Member]
Fair Value Measurement Inputs Disclosure [Line Items]
Fair Value Unobservable Inputs, Correlation	(10.00%)	(10.00%)
Fair Value Unobservable Input, Volatility	0.31%	0.31%
Minimum [Member] \| Credit Risk Contract [Member]
Fair Value Measurement Inputs Disclosure [Line Items]
Fair Value Unobservable Inputs, Correlation	36.00%	35.00%
Fair Value Unobservable Inputs, Credit spreads	0.01%	0.01%
Fair Value Unobservable Inputs, Upfront Credit Points	0.00%	0.00%
Fair Value Unobservable Inputs, Recovery rates	20.00%	1.00%
Minimum [Member] \| Foreign Exchange Contract [Member]
Fair Value Measurement Inputs Disclosure [Line Items]
Fair Value Unobservable Inputs, Correlation	25.00%	25.00%
Minimum [Member] \| Commodity Contract [Member]
Fair Value Measurement Inputs Disclosure [Line Items]
Fair Value Unobservable Input, Volatility	10.00%	13.00%
Minimum [Member] \| Commodity Contract [Member] \| Natural Gas [Member]
Fair Value Measurement Inputs Disclosure [Line Items]
Fair Value Unobservable Inputs, Spread \| $ / MMBTU	(1.68)	(1.81)
Minimum [Member] \| Commodity Contract [Member] \| Oil [Member]
Fair Value Measurement Inputs Disclosure [Line Items]
Fair Value Unobservable Inputs, Spread \| $ / Bbls	(9.31)	(19.72)
Minimum [Member] \| Equity Contract [Member]
Fair Value Measurement Inputs Disclosure [Line Items]
Fair Value Unobservable Inputs, Correlation	(30.00%)	(39.00%)
Fair Value Unobservable Input, Volatility	5.00%	5.00%
Maximum [Member] \| Interest Rate Contract [Member]
Fair Value Measurement Inputs Disclosure [Line Items]
Fair Value Unobservable Inputs, Correlation	86.00%	86.00%
Fair Value Unobservable Input, Volatility	1.51%	1.51%
Maximum [Member] \| Credit Risk Contract [Member]
Fair Value Measurement Inputs Disclosure [Line Items]
Fair Value Unobservable Inputs, Correlation	90.00%	91.00%
Fair Value Unobservable Inputs, Credit spreads	9.62%	9.93%
Fair Value Unobservable Inputs, Upfront Credit Points	0.99%	1.00%
Fair Value Unobservable Inputs, Recovery rates	97.00%	97.00%
Maximum [Member] \| Foreign Exchange Contract [Member]
Fair Value Measurement Inputs Disclosure [Line Items]
Fair Value Unobservable Inputs, Correlation	70.00%	70.00%
Maximum [Member] \| Commodity Contract [Member]
Fair Value Measurement Inputs Disclosure [Line Items]
Fair Value Unobservable Input, Volatility	59.00%	68.00%
Maximum [Member] \| Commodity Contract [Member] \| Natural Gas [Member]
Fair Value Measurement Inputs Disclosure [Line Items]
Fair Value Unobservable Inputs, Spread \| $ / MMBTU	3.47	4.33
Maximum [Member] \| Commodity Contract [Member] \| Oil [Member]
Fair Value Measurement Inputs Disclosure [Line Items]
Fair Value Unobservable Inputs, Spread \| $ / Bbls	63.63	64.92
Maximum [Member] \| Equity Contract [Member]
Fair Value Measurement Inputs Disclosure [Line Items]
Fair Value Unobservable Inputs, Correlation	89.00%	88.00%
Fair Value Unobservable Input, Volatility	80.00%	72.00%