Fair value of RSUs and PSUs granted.

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Performance share unit payout based upon certain performance metrics.

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Sum of the carrying values as of the balance sheet date of obligations incurred through that date and due within one year (or the operating cycle, if longer), including liabilities incurred (and for which invoices have typically been received) and payable to vendors for goods and services received, taxes, interest, rent and utilities, accrued salaries and bonuses, payroll taxes and fringe benefits.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
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-Name Accounting Standards Codification
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Amount of liabilities classified as other.

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-Name Accounting Standards Codification
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- Definition

Period which an employee's right to exercise an award is no longer contingent on satisfaction of either a service condition, market condition or a performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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-Name Accounting Standards Codification
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- Definition

The number of equity-based payment instruments, excluding stock (or unit) options, that were forfeited during the reporting period.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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- Definition

Weighted average fair value as of the grant date of equity-based award plans other than stock (unit) option plans that were not exercised or put into effect as a result of the occurrence of a terminating event.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
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-Name Accounting Standards Codification
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- Definition

The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
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The weighted average fair value at grant date for nonvested equity-based awards issued during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition

The number of non-vested equity-based payment instruments, excluding stock (or unit) options, that validly exist and are outstanding as of the balance sheet date.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
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The weighted average fair value of nonvested awards on equity-based plans excluding option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, revenue or profit achievement stock award plan) for which the employer is contingently obligated to issue equity instruments or transfer assets to an employee who has not yet satisfied service or performance criteria necessary to gain title to proceeds from the sale of the award or underlying shares or units.

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- Definition

The number of equity-based payment instruments, excluding stock (or unit) options, that vested during the reporting period.

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-Name Accounting Standards Codification
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The weighted average fair value as of grant date pertaining to an equity-based award plan other than a stock (or unit) option plan for which the grantee gained the right during the reporting period, by satisfying service and performance requirements, to receive or retain shares or units, other instruments, or cash in accordance with the terms of the arrangement.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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No definition available.

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A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

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No definition available.

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Intrinsic value of equity-based compensation awards outstanding. Excludes stock and unit options.

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No definition available.

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Intrinsic value of equity-based compensation awards vested. Excludes stock and unit options.

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No definition available.

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STOCKHOLDERS' EQUITY AND STOCK-BASED COMPENSATION STOCKHOLDERS' EQUITY AND STOCK-BASED COMPENSATION (Cash-settled RSUs and PSUs) (Details) - USD ($) $ / shares in Units, $ in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Outstanding [Roll Forward]
Accounts Payable and Accrued Liabilities, Current	$ 2,393	$ 3,232
Cash settled Restricted Stock Units (RSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period	3 years
Cash Settled Performance Stock Units (PSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Outstanding [Roll Forward]
Granted in period (number of RSUs and PSUs)		582,000
Cash Settled Performance Stock Units (PSUs) [Member] \| Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Performance Share Unit Payout		50.00%
Cash Settled Performance Stock Units (PSUs) [Member] \| Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Performance Share Unit Payout		200.00%
Cash Settled Restricted Stock Units (RSUs) and Performance Share Units (PSU's) [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Outstanding [Roll Forward]
Balance at beginning of period (in number of RSUs and PSUs)	4,612,536
Granted in period (number of RSUs and PSUs)	676,000
Vested in Period (number of RSUs and PSUs)	(2,148,558)
Forfeited in Period (number of RSUs and PSUs)	(608,234)
Balance at end of period (in number of RSUs and PSUs)	2,531,744	4,612,536
Beginning Balance - weighted average grant date fair value	$ 24.89
Granted - Weighted average grant date fair value	6.05
Vested - weighted average grant date fair value	25.83
Forfeited - weighted average grant date fair value	23.92
Ending balance - weighted average grant date fair value	$ 19.30	$ 24.89
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Aggregate Intrinsic Value, Outstanding	$ 33
Fair value of RSUs and PSUs granted	4	$ 44	$ 68
Intrinsic value of RSUs and PSUs vested	15	24
Other Liabilities	4	8
Accounts Payable and Accrued Liabilities, Current	$ 23	$ 10
Cash Settled Restricted Stock Units (RSUs) and Performance Share Units (PSU's) [Member] \| Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period	3 years
Cash Settled Restricted Stock Units (RSUs) and Performance Share Units (PSU's) [Member] \| Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period	5 years