FAIR VALUE MEASUREMENTS (Fair Value of Assets and Liabilities Measured at Fair Value on a Recurring Basis) (Details) (USD $) In Millions	Jun. 30, 2011		Mar. 31, 2011
Accrued And Other Current Liabilities And Other Liabilities [Member] | Fair Value Balance [Member] | Contingent Consideration [Member]
Contingent consideration	$ 53	[1]	$ 51	[1]
Accrued And Other Current Liabilities And Other Liabilities [Member] | Significant Unobservable Inputs (Level 3) [Member] | Contingent Consideration [Member]
Contingent consideration	53	[1]	51	[1]
Cash Equivalents [Member] | Fair Value Balance [Member] | Money Market Funds [Member]
Assets at fair value	392		774
Cash Equivalents [Member] | Quoted Prices In Active Markets For Identical Financial Instruments (Level 1) [Member] | Money Market Funds [Member]
Assets at fair value	392		774
Marketable Equity Securities [Member] | Fair Value Balance [Member] | Marketable Equity Securities [Member]
Assets at fair value	172		161
Marketable Equity Securities [Member] | Quoted Prices In Active Markets For Identical Financial Instruments (Level 1) [Member] | Marketable Equity Securities [Member]
Assets at fair value	172		161
Short-term Investments And Cash Equivalents [Member] | Fair Value Balance [Member] | U.S. Agency Securities [Member]
Assets at fair value	126
Short-term Investments And Cash Equivalents [Member] | Fair Value Balance [Member] | U.S. Treasury Securities [Member]
Assets at fair value	125		129
Short-term Investments And Cash Equivalents [Member] | Fair Value Balance [Member] | Commercial Paper [Member]
Assets at fair value	32		31
Short-term Investments And Cash Equivalents [Member] | Significant Other Observable Inputs (Level 2) [Member] | U.S. Agency Securities [Member]
Assets at fair value	126
Short-term Investments And Cash Equivalents [Member] | Significant Other Observable Inputs (Level 2) [Member] | Commercial Paper [Member]
Assets at fair value	32		31
Short-term Investments And Cash Equivalents [Member] | Quoted Prices In Active Markets For Identical Financial Instruments (Level 1) [Member] | U.S. Treasury Securities [Member]
Assets at fair value	125		129
Short-term Investments [Member] | Fair Value Balance [Member] | Corporate Bonds [Member]
Assets at fair value	242		253
Short-term Investments [Member] | Fair Value Balance [Member] | U.S. Agency Securities [Member]
Assets at fair value			102
Short-term Investments [Member] | Significant Other Observable Inputs (Level 2) [Member] | Corporate Bonds [Member]
Assets at fair value	242		253
Short-term Investments [Member] | Significant Other Observable Inputs (Level 2) [Member] | U.S. Agency Securities [Member]
Assets at fair value			102
Other Assets [Member] | Fair Value Balance [Member] | Deferred Compensation Plan Assets [Member]
Assets at fair value	12	[2]	12	[2]
Other Assets [Member] | Quoted Prices In Active Markets For Identical Financial Instruments (Level 1) [Member] | Deferred Compensation Plan Assets [Member]
Assets at fair value	12	[2]	12	[2]
Other Current Assets [Member] | Fair Value Balance [Member]
Assets at fair value	1
Other Current Assets [Member] | Significant Other Observable Inputs (Level 2) [Member]
Assets at fair value	1
Fair Value Balance [Member]
Total assets at fair value	1,102		1,462
Total liability at fair value	53		51
Significant Other Observable Inputs (Level 2) [Member]
Total assets at fair value	401		386
Quoted Prices In Active Markets For Identical Financial Instruments (Level 1) [Member]
Total assets at fair value	701		1,076
Significant Unobservable Inputs (Level 3) [Member]
Total liability at fair value	$ 53		$ 51

[1] The contingent consideration represents the estimated fair value of the additional variable cash consideration payable in connection with our acquisitions of Playfish Limited ("Playfish") and Chillingo Limited ("Chillingo") that is contingent upon the achievement of certain performance milestones. We estimated the fair value using expected future cash flows over the period in which the obligations are expected to be settled, and applied a discount rate that appropriately captures a market participant's view of the risk associated with the obligations.

[2] The deferred compensation plan assets consist of various mutual funds.