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CASH AND INVESTMENTS - Additional Information (Detail) (USD $)
In Millions, unless otherwise specified |
12 Months Ended | 3 Months Ended | ||||||
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Dec. 31, 2012
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Dec. 31, 2011
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Dec. 31, 2010
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Jun. 30, 2011
Mortgage and asset-backed debt securities
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Dec. 31, 2012
Self-insurance requirements
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Dec. 31, 2011
Self-insurance requirements
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Dec. 31, 2012
Variable life insurance policy
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Dec. 31, 2011
Variable life insurance policy
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| Gain (Loss) on Investments [Line Items] | ||||||||
| Gross realized gains on sales of marketable securities | $ 15 | $ 49 | $ 24 | |||||
| Gross realized losses on sales of marketable securities | 6 | 20 | 18 | |||||
| Impairment charge | 0 | 0 | 21 | 21 | ||||
| Auction rate securities at carrying value | 128 | |||||||
| Auction rate securities fair value | 107 | |||||||
| Investments and Restricted Cash | $ 307 | $ 303 | $ 288 | $ 286 | $ 19 | $ 17 | ||
| Weighted average discount rate | 7.75% | 7.91% | ||||||
| X | ||||||||||
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- Definition
Auction rate securities, at Cost No definition available.
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| X | ||||||||||
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- Definition
Auction rate securities, at Fair Value No definition available.
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| X | ||||||||||
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- Definition
This item represents the gross profit realized on the sale of debt or equity securities categorized neither as held-to-maturity nor trading securities. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
This item represents the gross loss realized on the sale of debt or equity securities categorized neither as held-to-maturity nor trading securities. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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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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| X | ||||||||||
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- Definition
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. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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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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| X | ||||||||||
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- Details
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