Income Taxes - Balance Sheet Impact on Refund and Interest from Foreign Tax Authority (Detail) (USD $) In Millions, unless otherwise specified	6 Months Ended			3 Months Ended	6 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Jun. 30, 2013	Dec. 31, 2013 Foreign Tax Authority [Member]	Dec. 31, 2013 Foreign Tax Authority [Member]
Components Of Income Tax Expense Benefit [Line Items]
Gross tax refund and interest receivable				$ 239	$ 794
Amount received from foreign tax authority as of December 31, 2013	682	5			654
Receivable recorded within Income taxes receivable as of December 31, 2013	$ 147		$ 29	$ 140	$ 140