Annual report pursuant to Section 13 and 15(d)

CASH AND INVESTMENTS - Additional Information (Detail)

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CASH AND INVESTMENTS - Additional Information (Detail) (USD $)
12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Gain (Loss) on Investments [Line Items]      
Gross realized gains on sales of marketable securities $ 11,000,000 $ 15,000,000 $ 49,000,000
Document Fiscal Year Focus 2013    
Gross realized losses on sales of marketable securities 6,000,000 6,000,000 20,000,000
Impairment charge 0 0 0
Investments and Restricted Cash 444,000,000 307,000,000  
Weighted average discount rate 8.65% 7.75%  
Self-insurance requirements
     
Gain (Loss) on Investments [Line Items]      
Investments and Restricted Cash 425,000,000 288,000,000  
Variable life insurance policy
     
Gain (Loss) on Investments [Line Items]      
Investments and Restricted Cash $ 19,000,000