v2.4.0.8
Net Recognized Gains (Losses) on Investments (Detail) (USD $)
In Millions, unless otherwise specified
12 Months Ended
Jun. 30, 2014
Jun. 30, 2013
Jun. 30, 2012
Gains (Losses) on Investments [Line Items]      
Other-than-temporary impairments of investments $ (106) $ (208) $ (298)
Realized gains from sales of available-for-sale securities 776 489 1,418
Realized losses from sales of available-for-sale securities (233) (165) (556)
Total $ 437 $ 116 $ 564