Quarterly report pursuant to Section 13 or 15(d)

CASH AND INVESTMENTS - Additional Information (Detail)

v2.4.0.6
CASH AND INVESTMENTS - Additional Information (Detail) (USD $)
In Millions, unless otherwise specified
Mar. 31, 2012
Dec. 31, 2011
Gain (Loss) on Investments [Line Items]    
Restricted Cash and Investments, Noncurrent $ 304 $ 303
Self-insurance requirements
   
Gain (Loss) on Investments [Line Items]    
Restricted Cash and Investments, Noncurrent 286 286
Variable life insurance policy
   
Gain (Loss) on Investments [Line Items]    
Restricted Cash and Investments, Noncurrent $ 18 $ 17