Annual report pursuant to Section 13 and 15(d)

INVESTMENTS AND RESTRICTED CASH - Age of Gross Unrealized Losses and Fair Value by Investment Category (Detail)

v3.22.0.1
INVESTMENTS AND RESTRICTED CASH - Age of Gross Unrealized Losses and Fair Value by Investment Category (Detail)
$ in Millions
 12 Months Ended
Dec. 31, 2021
USD ($)
Gain (Loss) on Securities [Line Items]  
Less Than 12 Months Fair Value $ 200
Less Than 12 Months Unrealized Losses 1
12 Months or More Fair Value 75
12 Months or More Unrealized Losses 0
Total Fair Value 275
Total Unrealized Losses 1
U.S. government and agency debt securities  
Gain (Loss) on Securities [Line Items]  
Less Than 12 Months Fair Value 145
Less Than 12 Months Unrealized Losses 1
12 Months or More Fair Value 55
12 Months or More Unrealized Losses 0
Total Fair Value 200
Total Unrealized Losses 1
Mortgage and asset-backed debt securities  
Gain (Loss) on Securities [Line Items]  
Less Than 12 Months Fair Value 6
Less Than 12 Months Unrealized Losses 0
12 Months or More Fair Value 0
12 Months or More Unrealized Losses 0
Total Fair Value 6
Total Unrealized Losses 0
Corporate debt securities  
Gain (Loss) on Securities [Line Items]  
Less Than 12 Months Fair Value 44
Less Than 12 Months Unrealized Losses 0
12 Months or More Fair Value 20
12 Months or More Unrealized Losses 0
Total Fair Value 64
Total Unrealized Losses 0
U.S. state and local municipal debt securities  
Gain (Loss) on Securities [Line Items]  
Less Than 12 Months Fair Value 5
Less Than 12 Months Unrealized Losses 0
12 Months or More Fair Value 0
12 Months or More Unrealized Losses 0
Total Fair Value 5
Total Unrealized Losses $ 0