Annual report pursuant to Section 13 and 15(d)

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

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CASH AND INVESTMENTS - Age of Gross Unrealized Losses and Fair Value by Investment Category (Detail)
$ in Millions
 12 Months Ended
Dec. 31, 2018
USD ($)
Gain (Loss) on Securities [Line Items]  
Less Than 12 Months Fair Value $ 177
Less Than 12 Months Unrealized Losses 0
12 Months or More Fair Value 233
12 Months or More Unrealized Losses 5
Total Fair Value 410
Total Unrealized Losses 5
U.S. government and agency debt securities  
Gain (Loss) on Securities [Line Items]  
Less Than 12 Months Fair Value 54
Less Than 12 Months Unrealized Losses 0
12 Months or More Fair Value 111
12 Months or More Unrealized Losses 2
Total Fair Value 165
Total Unrealized Losses 2
Mortgage and asset-backed debt securities  
Gain (Loss) on Securities [Line Items]  
Less Than 12 Months Fair Value 24
Less Than 12 Months Unrealized Losses 0
12 Months or More Fair Value 36
12 Months or More Unrealized Losses 1
Total Fair Value 60
Total Unrealized Losses 1
Corporate debt securities  
Gain (Loss) on Securities [Line Items]  
Less Than 12 Months Fair Value 99
Less Than 12 Months Unrealized Losses 0
12 Months or More Fair Value 81
12 Months or More Unrealized Losses 2
Total Fair Value 180
Total Unrealized Losses 2
Non-U.S. government debt securities  
Gain (Loss) on Securities [Line Items]  
Less Than 12 Months Fair Value 0
Less Than 12 Months Unrealized Losses 0
12 Months or More Fair Value 5
12 Months or More Unrealized Losses 0
Total Fair Value 5
Total Unrealized Losses $ 0