Commitments And Contingencies (Minimum Contractual Obligations) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Dec. 31, 2011		Dec. 31, 2011		Jul. 20, 2011
Unrecorded Unconditional Purchase Obligation [Line Items]
2012 (remaining three months)	$ 88		$ 88
2013	315		315
2014	232		232
2015	192		192
2016	150		150
Thereafter	467		467
Total	1,444		1,444
Amount that would reduce lease commitments due to minimum sub-lease rentals for unutilized office space resulting from reorganization activities due in the future under non-cancelable sub-leases	7		7
Principal amount	633.0		633.0
Contractual interest rate of 0.75% Convertible Senior Notes due 2016	0.75%		0.75%
Leases [Member]
Unrecorded Unconditional Purchase Obligation [Line Items]
2012 (remaining three months)	13	[1]	13	[1]
2013	52	[1]	52	[1]
2014	48	[1]	48	[1]
2015	39	[1]	39	[1]
2016	28	[1]	28	[1]
Thereafter	36	[1]	36	[1]
Total	216	[1]	216	[1]
Developer/Licensor Commitments [Member]
Unrecorded Unconditional Purchase Obligation [Line Items]
2012 (remaining three months)	50		50
2013	191		191
2014	121		121
2015	116		116
2016	84		84
Thereafter	334		334
Total	896		896
Marketing [Member]
Unrecorded Unconditional Purchase Obligation [Line Items]
2012 (remaining three months)	18		18
2013	58		58
2014	51		51
2015	32		32
2016	33		33
Thereafter	95		95
Total	287		287
Other Purchase Obligations [Member]
Unrecorded Unconditional Purchase Obligation [Line Items]
2012 (remaining three months)	5		5
2013	9		9
2014	7		7
Total	21		21
Convertible Notes Interest [Member]
Unrecorded Unconditional Purchase Obligation [Line Items]
2012 (remaining three months)	2	[2]	2	[2]
2013	5	[2]	5	[2]
2014	5	[2]	5	[2]
2015	5	[2]	5	[2]
2016	5	[2]	5	[2]
Thereafter	2	[2]	2	[2]
Total	24	[2]	24	[2]
0.75% Convertible Senior Notes [Member]
Unrecorded Unconditional Purchase Obligation [Line Items]
Principal amount	$ 632.5		$ 632.5		$ 632.5
Contractual interest rate of 0.75% Convertible Senior Notes due 2016	0.75%		0.75%
Convertible Senior Notes due			2016
0.75% Convertible Senior Notes due 2016 maturity date	Jul. 15, 2016		Jul. 15, 2016

[1] Lease commitments have not been reduced by minimum sub-lease rentals for unutilized office space resulting from our reorganization activities of approximately $7 million due in the future under non-cancelable sub-leases.

[2] In addition to the interest payments reflected in the table above, we will be obligated to pay the $632.5 million principal amount of the 0.75% Convertible Senior Notes due 2016 and any excess conversion value in shares of our common stock upon redemption after the maturity of the Notes on July 15, 2016 or earlier. See Note 12 for additional information related to our 0.75% Convertible Senior Notes due 2016.