Quarterly report pursuant to Section 13 or 15(d)

CASH AND INVESTMENTS - Additional Information (Detail)

v3.21.2
CASH AND INVESTMENTS - Additional Information (Detail) - USD ($)
9 Months Ended
Sep. 30, 2021
Dec. 31, 2020
Sep. 30, 2020
Gain (Loss) on Securities [Line Items]      
Other than temporary impairment losses $ 0    
Investments and Restricted Cash 24,000,000 $ 25,000,000  
Transfer between level 1 and level 2 0   $ 0
cash held in escrow [Member]      
Gain (Loss) on Securities [Line Items]      
Restricted Cash and Cash Equivalents, Noncurrent 1,000,000 2,000,000  
Variable life insurance policy      
Gain (Loss) on Securities [Line Items]      
Investments and Restricted Cash $ 23,000,000 $ 23,000,000