CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (USD $) In Millions, except Share data, unless otherwise specified	3 Months Ended
Mar. 31, 2015	Mar. 31, 2014
Income Statement [Abstract]
REVENUES	$ 2,362us-gaap_Revenues	$ 2,202us-gaap_Revenues
COSTS AND EXPENSES:
Operating costs and expenses (exclusive of items shown separately below)	1,581us-gaap_OperatingExpenses	1,447us-gaap_OperatingExpenses
Depreciation and amortization	514	505
Other operating expenses, net	18us-gaap_OtherOperatingIncomeExpenseNet	10us-gaap_OtherOperatingIncomeExpenseNet
Total costs and expenses	2,113us-gaap_CostsAndExpenses	1,962us-gaap_CostsAndExpenses
Income from operations	249us-gaap_OperatingIncomeLoss	240us-gaap_OperatingIncomeLoss
OTHER EXPENSES:
Interest expense, net	(289)us-gaap_InterestExpense	(211)us-gaap_InterestExpense
Loss on derivative instruments, net	(6)	(2)
Total other expenses	(295)us-gaap_NonoperatingIncomeExpense	(213)us-gaap_NonoperatingIncomeExpense
Income (loss) before income taxes	(46)	27
Income tax expense	(35)us-gaap_IncomeTaxExpenseBenefit	(64)us-gaap_IncomeTaxExpenseBenefit
Net loss	$ (81)us-gaap_ProfitLoss	$ (37)us-gaap_ProfitLoss
LOSS PER COMMON SHARE, BASIC AND DILUTED
LOSS PER COMMON SHARE, BASIC AND DILUTED (in dollars per share)	$ (0.73)us-gaap_EarningsPerShareBasicAndDiluted	$ (0.35)us-gaap_EarningsPerShareBasicAndDiluted
Weighted average common shares outstanding, basic and diluted (in shares)	111,655,617	106,439,198

Total costs of sales and operating expenses for the period.

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The aggregate net amount of depreciation, amortization, and accretion recognized during an accounting period. As a noncash item, the net amount is added back to net income when calculating cash provided by or used in operations using the indirect method.

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Amount of realized and unrealized gain (loss) of derivative instruments not designated or qualifying as hedging instruments.

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The amount of net income or loss for the period per each share in instances when basic and diluted earnings per share are the same amount and reported as a single line item on the face of the financial statements. Basic earnings per share is the amount of net income or loss for the period per each share of common stock or unit outstanding during the reporting period. Diluted earnings per share includes the amount of net income or loss for the period available to each share of common stock or common unit outstanding during the reporting period and to each share or unit that would have been outstanding assuming the issuance of common shares or units for all dilutive potential common shares or units outstanding during the reporting period.

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This element represents the income or loss from continuing operations attributable to the economic entity which may also be defined as revenue less expenses from ongoing operations, after income or loss from equity method investments, but before income taxes, extraordinary items, and noncontrolling interest.

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Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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Amount of the cost of borrowed funds accounted for as interest expense.

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The aggregate amount of income or expense from ancillary business-related activities (that is to say, excluding major activities considered part of the normal operations of the business).

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Generally recurring costs associated with normal operations except for the portion of these expenses which can be clearly related to production and included in cost of sales or services. Includes selling, general and administrative expense.

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The net result for the period of deducting operating expenses from operating revenues.

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The net amount of other operating income and expenses, the components of which are not separately disclosed on the income statement, from items that are associated with the entity's normal revenue producing operations.

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The consolidated profit or loss for the period, net of income taxes, including the portion attributable to the noncontrolling interest.

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Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss).

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Average number of shares or units issued and outstanding that are used in calculating basic and diluted earnings per share (EPS).

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