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