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) (USD $)
In Millions, unless otherwise specified
 12 Months Ended
Dec. 31, 2013
Gain (Loss) on Investments [Line Items]  
Less Than 12 Months Fair Value $ 280
Less Than 12 Months Unrealized Losses 4
12 Months or More Fair Value 4
12 Months or More Unrealized Losses 0
Total Fair Value 284
Total Unrealized Losses 4
U.S. government and agency debt securities
  
Gain (Loss) on Investments [Line Items]  
Less Than 12 Months Fair Value 183
Less Than 12 Months Unrealized Losses 1
12 Months or More Fair Value 0
12 Months or More Unrealized Losses 0
Total Fair Value 183
Total Unrealized Losses 1
Mortgage and asset-backed debt securities
  
Gain (Loss) on Investments [Line Items]  
Less Than 12 Months Fair Value 50
Less Than 12 Months Unrealized Losses 2
12 Months or More Fair Value 4
12 Months or More Unrealized Losses 0
Total Fair Value 54
Total Unrealized Losses 2
Corporate debt securities
  
Gain (Loss) on Investments [Line Items]  
Less Than 12 Months Fair Value 47
Less Than 12 Months Unrealized Losses 1
12 Months or More Fair Value 0
12 Months or More Unrealized Losses 0
Total Fair Value 47
Total Unrealized Losses 1
U.S. state and local municipal debt securities
  
Gain (Loss) on Investments [Line Items]  
Less Than 12 Months Fair Value 0
Less Than 12 Months Unrealized Losses 0
12 Months or More Fair Value 0
12 Months or More Unrealized Losses 0
Total Fair Value 0
Total Unrealized Losses 0
Other debt securities
  
Gain (Loss) on Investments [Line Items]  
Less Than 12 Months Fair Value 0
Less Than 12 Months Unrealized Losses 0
12 Months or More Fair Value 0
12 Months or More Unrealized Losses 0
Total Fair Value 0
Total Unrealized Losses $ 0