Stock Based Compensation (Details) (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended
	Sep. 30, 2011 Year HardDrive
Stock Option Activity
Options outstanding, Beginning Balance, Numbers of Shares	10.2
Options outstanding, Beginning Balance, Weighted Average Exercise Price	$ 22.49
Granted, Number of Shares	2.5
Granted, Weighted Average Exercise Price Per Share	$ 29.64
Exercised, Number Of Shares	(0.2)
Exercised, Weighted Average Exercise Price Per Share	$ 7.99
Canceled or expired, Number of Shares	0
Canceled or expired, Weighted Average Exercise Price Per Share	$ 0.00
Options outstanding, Ending Balance, Numbers of Shares	12.5
Options outstanding, Ending Balance, Weighted Average Exercise Price	$ 24.20
Options Outstanding, Ending Balance, Weighted Average Remaining Contractual Life (in years)	4.9
Options Outstanding, Ending Balance, Aggregate Intrinsic Value	$ 46
Exercisable at September 30, 2011, Number of Shares	6.2
Exercisable at September 30, 2011, Weighted Average Exercise Price Per Share	$ 20.75
Exercisable at September 30, 2011, Weighted Average Remaining Contractual Life	3.9
Exercisable at September 30, 2011, Aggregate Intrinsic Value	38
Vested and Expected to Vest after September 30, 2011	12.3
Vested and expected to vest after September 30, 2011, Weighted Average Exercise Price Per Share	$ 24.13
Vested and expected to vest after September 30, 2011, Weighted Average Remaining Contractual Life (in years)	4.9
Vested and expected to vest after September 30, 2011, Aggregate Intrinsic Value	$ 46