INVESTMENTS AND RESTRICTED CASH - Additional Information (Detail) - USD ($) $ in Millions |
3 Months Ended | 12 Months Ended | |
|---|---|---|---|
Mar. 31, 2016 |
Mar. 31, 2015 |
Dec. 31, 2015 |
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| Gain (Loss) on Investments [Line Items] | |||
| Trading Securities, Change in Unrealized Holding Gain (Loss) | $ (156) | $ 1 | |
| Trading Securities | 1,391 | $ 1,429 | |
| Restricted Cash and Investments, Noncurrent | $ 484 | $ 473 | |
| Fair Value Inputs, Discount Rate | 7.77% | 8.22% | |
| cash held in escrow [Member] | |||
| Gain (Loss) on Investments [Line Items] | |||
| Restricted Cash and Cash Equivalents, Noncurrent | $ 23 | $ 12 | |
| Self-insurance requirements [Member] | |||
| Gain (Loss) on Investments [Line Items] | |||
| Restricted Cash and Investments, Noncurrent | 442 | 442 | |
| Variable life insurance policy | |||
| Gain (Loss) on Investments [Line Items] | |||
| Restricted Cash and Investments, Noncurrent | $ 19 | $ 19 | |
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- Definition Interest rate used to find the present value of an amount to be paid or received in the future as an input to measure fair value. For example, but not limited to, weighted average cost of capital (WACC), cost of capital, cost of equity and cost of debt. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Cash and equivalents whose use in whole or in part is restricted for the long-term, generally by contractual agreements or regulatory requirements. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition The noncurrent cash, cash equivalents and investments that is restricted as to withdrawal or usage. Restrictions may include legally restricted deposits held as compensating balances against borrowing arrangements, contracts entered into with others, or entity statements of intention with regard to particular deposits classified as long-term; that is not expected to be released from such existing restrictions within one year of the balance sheet date or operating cycle, whichever is longer. Excludes compensating balance arrangements that are not agreements which legally restrict the use of cash amounts shown on the balance sheet. Includes noncurrent cash equivalents and investments that are similarly restricted as to withdrawal, usage or disposal. No definition available.
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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. No definition available.
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- Definition Amount of investments in debt and equity securities and other forms of securities that provide ownership interests classified as trading. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Amount of unrealized holding gain (loss) recognized in the income statement for investments in debt and equity securities and other forms of securities that provide ownership interests classified as trading. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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