Equity Method Investments and Related Party Transactions (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Equity Method Investments Disclosure [Abstract]
Proceeds from Equity Method Investment, Dividends or Distributions	$ 451	$ 435	$ 381
Schedule of Equity Method Investments [Line Items]
Equity Method Investments	1,113us-gaap_EquityMethodInvestments	1,201us-gaap_EquityMethodInvestments
Equity Method Investment, Summarized Financial Information [Abstract]
Revenues and other income	1,349	1,444	1,330
Income from operations	826	849	755
Net income	728	727	635
Current assets	639	644
Noncurrent assets	1,461	1,590
Current liabilities	371	384
Noncurrent liabilities	39	33
Related Party Transactions [Abstract]
Revenue from Related Parties	56us-gaap_RevenueFromRelatedParties	55us-gaap_RevenueFromRelatedParties	58us-gaap_RevenueFromRelatedParties
Related Party Transaction, Purchases from Related Party	207	242	248
Accounts Receivable, Related Parties, Current	31	30
Accounts Payable, Related Parties, Current	11	20
EG Holdings [Member]
Schedule of Equity Method Investments [Line Items]
Equity Method Investment, Ownership Percentage	60.00%
Equity Method Investments	693	748
Alba Plant LLC [Member]
Schedule of Equity Method Investments [Line Items]
Equity Method Investment, Ownership Percentage	52.00%
Equity Method Investments	225	263
AMPCO [Member]
Schedule of Equity Method Investments [Line Items]
Equity Method Investment, Ownership Percentage	45.00%
Equity Method Investments	194	189
Other Equity Method Investees [Member]
Schedule of Equity Method Investments [Line Items]
Equity Method Investments	$ 1	$ 1

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Amount for accounts payable to related parties. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

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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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The amount of current assets reported by an equity method investment of the entity.

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The amount of income (loss) from continuing operations before extraordinary items reported by an equity method investment of the entity.

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The amount of net income (loss) reported by an equity method investment of the entity.

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