Annual report pursuant to Section 13 and 15(d)

CASH AND INVESTMENTS - Additional Information (Detail)

v2.4.0.6
CASH AND INVESTMENTS - Additional Information (Detail) (USD $)
In Millions, unless otherwise specified
 12 Months Ended 3 Months Ended
Dec. 31, 2011
Dec. 31, 2010
Dec. 31, 2009
Jun. 30, 2010
Asset-backed Securities
Jun. 30, 2009
Collateralized Securities
Dec. 31, 2011
Self-insurance requirements
Dec. 31, 2010
Self-insurance requirements
Dec. 31, 2011
Variable life insurance policy
Gain (Loss) on Investments [Line Items]                
Perpetual preferred securities and an auction rate security cost         $ 42      
Auction rate securities at carrying value       128        
Gross realized gains on sales of marketable securities 49 24 16          
Perpetual preferred securities and an auction rate security fair value         25      
Auction rate securities fair value       107        
Gross realized losses on sales of marketable securities 20 18 12          
Impairment charge 0 21 17 21 17      
Non-Current Investments and Restricted Cash $ 303 $ 458       $ 286 $ 286 $ 17