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Share-Based Compensation (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2012	Dec. 31, 2011
Share-Based Compensation
Allocated Share-based Compensation Expense	$ 75	$ 88	$ 154	$ 168
Stock Options [Member]
Share-Based Compensation
Allocated Share-based Compensation Expense	62	76	116	138
Other Share-based Awards [Member]
Share-Based Compensation
Allocated Share-based Compensation Expense	$ 13	$ 12	$ 38	$ 30

Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees.

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