Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Jun. 30, 2015	Sep. 30, 2014
Current assets:
Allowances for returns and doubtful accounts	$ 911,727	$ 998,383
Stockholders' equity:
Common stock, par value	$ 0.01	$ 0.01
Common stock, shares authorized	600,000,000	600,000,000
Common stock, shares issued	274,673,530	271,126,753
Common stock, shares outstanding	216,517,538	221,908,650
Treasury stock, shares held	58,155,992	49,218,103