v2.4.0.8

Investments - Narrative (Details) (USD $) In Millions, unless otherwise specified	6 Months Ended				6 Months Ended			6 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014 FTS International, Inc. [Member]	Dec. 31, 2013 FTS International, Inc. [Member]	Jun. 30, 2014 Sundrop Fuels Inc [Member]	Dec. 31, 2013 Sundrop Fuels Inc [Member]	Jul. 20, 2011 Sundrop Fuels Inc [Member]	Jun. 30, 2014 Chaparral Energy, Inc. [Member]	Dec. 31, 2013 Chaparral Energy, Inc. [Member]	Jun. 30, 2013 Clean Energy Fuels Corp [Member]	Jun. 30, 2014 Other Investments [Member]	Jun. 30, 2013 Other Investments [Member]
Schedule of Equity Method Investments [Line Items]
Equity Investment Adjustments			$ 27		$ 7
Equity method accretion adjustments			8		67
Excess carrying value of investment over underlying equity in net assets			46
Equity Method Investment, Difference Between Carrying Amount and Underlying Equity Attributable to Goodwill			14
Interest Costs Capitalized					5
Equity Method Investments			119	138	133	135	155	0	143
Equity Method Investment, Ownership Percentage			30.00%	30.00%	56.00%	56.00%		0.00%	20.00%
Proceeds from sales of investments	239	102						209			30	6
Gain on Sale of Investments								73				5
Loss on Sale of Investments											6
Cost Method Investments										100
Proceeds from Cost Method Investment										85
Other Commitment										50
Other than Temporary Impairment Losses, Investments										$ 15

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Equity Method Investment Adjustments

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Equity Method Investment, Difference Between Carrying Amount and Underlying Equity Attributable to Goodwill

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Proceeds from Cost Method Investment

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The sum of the periodic adjustments of the differences between securities' face values and purchase prices that are charged against earnings. This is called accretion if the security was purchased at a discount and amortization if it was purchased at premium. As a noncash item, this element is an adjustment to net income when calculating cash provided by or used in operations using the indirect method.

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Amount, after adjustment, of cost-method investment. Adjustments include, but are not limited to, dividends received in excess of earnings after date of investment that are considered a return of investment and other than temporary impairments.

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Difference between amount at which an investment accounted for under the equity method of accounting is carried (reported) on the balance sheet and amount of underlying equity in net assets the reporting Entity has in the investee.

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The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting.

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This item represents the carrying amount on the entity's balance sheet of its investment in common stock of an equity method investee. This is not an indicator of the fair value of the investment, rather it is the initial cost adjusted for the entity's share of earnings and losses of the investee, adjusted for any distributions (dividends) and other than temporary impairment (OTTI) losses recognized.

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The difference between the carrying value and the sale price of an investment. A gain would be recognized when the sale price of the investment is greater than the carrying value of the investment. This element refers to the Gain included in earnings and not to the cash proceeds of the sale.

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The amount by which the fair value of an investment is less than the amortized cost basis or carrying amount of that investment at the balance sheet date and the decline in fair value is deemed to be other than temporary, before considering whether or not such amount is recognized in earnings or other comprehensive income.

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Amount of interest capitalized during the period.

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-Glossary Allowance for Funds Used during Construction

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The difference between the carrying value and the sale price of an investment. A loss would be recognized when the sale price of the investment is less than the carrying value of the investment. This element refers to the Loss included in earnings and not to the cash proceeds of the sale.

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Minimum amount of other commitment not otherwise specified in the taxonomy. Excludes commitments explicitly modeled in the taxonomy, including but not limited to, long-term and short-term purchase commitments, recorded and unrecorded purchase obligations, supply commitments, registration payment arrangements, leases, debt, product warranties, guarantees, environmental remediation obligations, and pensions.

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The cash inflow associated with the sale of equity method investments, which are investments in joint ventures and entities in which the entity has an equity ownership interest normally of 20 to 50 percent and exercises significant influence.

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