CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY AND COMPREHENSIVE INCOME (UNAUDITED) (USD $) In Millions	Total USD ($)	Common Stock Outstanding	Common Stock/APIC USD ($)	Treasury Stock USD ($)	Retained Earnings USD ($)	Accumulated Other Comprehensive Income (Loss) USD ($)	Total Viacom Stockholders' Equity USD ($)	Noncontrolling Interests USD ($)
Equity, at beginning of period at Sep. 30, 2009	$ 8,044		$ 8,257	$ (5,725)	$ 5,408	$ 89	$ 8,029	$ 15
Shares issued, at beginning of period at Sep. 30, 2009		607.4
Adoption of accounting for consolidation of variable interest entities as of January 1, 2010	(40)				(28)		(28)	(12)
Net earnings	1,334				1,359		1,359	(25)
Translation adjustments	(132)					(129)	(129)	(3)
Defined benefit pension plans	(61)					(61)	(61)
Other	(2)				(1)	(1)	(2)
Comprehensive income	1,139						1,167	(28)
Noncontrolling interests	1		(4)		4		0	1
Dividends declared	(92)				(92)		(92)
Equity based compensation and other, value	63		63				63
Equity-based compensation and other, shares		1.0
Equity, at end of period at Jun. 30, 2010	9,115		8,316	(5,725)	6,650	(102)	9,139	(24)
Shares issued, at end of period at Jun. 30, 2010		608.4
Equity, at beginning of period at Mar. 31, 2010	8,850		8,306	(5,725)	6,323	(28)	8,876	(26)
Shares issued, at beginning of period at Mar. 31, 2010		607.7
Net earnings	426				420		420	6
Translation adjustments	(71)					(70)	(70)	(1)
Other	(5)				(1)	(4)	(5)
Comprehensive income	350						345	5
Noncontrolling interests	(3)						0	(3)
Dividends declared	(92)				(92)		(92)
Equity based compensation and other, value	10		10				10	0
Equity-based compensation and other, shares		0.7
Equity, at end of period at Jun. 30, 2010	9,115		8,316	(5,725)	6,650	(102)	9,139	(24)
Shares issued, at end of period at Jun. 30, 2010		608.4
Equity, at beginning of period at Sep. 30, 2010	9,259		8,347	(5,725)	6,775	(114)	9,283	(24)
Shares issued, at beginning of period at Sep. 30, 2010		608.5
Net earnings	1,590				1,560		1,560	30
Translation adjustments	96					93	93
Defined benefit pension plans	5					5	5
Other	(13)					(13)	(13)
Comprehensive income	1,678						1,645	33
Noncontrolling interests	(39)				(21)		(21)	(18)
Dividends declared	(329)				(329)		(329)
Purchase of treasury stock, value	(1,600)			(1,600)			(1,600)
Purchase of treasury stock, shares		(36.0)
Exercise of stock options and share issuances,value	117		117				117
Exercise of stock options and share issuances,shares		4.2
Equity based compensation and other, value	68		68				68
Equity, at end of period at Jun. 30, 2011	9,154		8,532	(7,325)	7,985	(29)	9,163	(9)
Shares issued, at end of period at Jun. 30, 2011		576.7
Equity, at beginning of period at Mar. 31, 2011	9,333		8,435	(6,625)	7,579	(36)	9,353	(20)
Shares issued, at beginning of period at Mar. 31, 2011		588.1
Net earnings	589				574		574	15
Translation adjustments	13					12	12	1
Defined benefit pension plans	2					2	2	0
Other	(7)					(7)	(7)	0
Comprehensive income	597						581	16
Noncontrolling interests	(26)				(21)		(21)	(5)
Dividends declared	(147)				(147)		(147)	0
Purchase of treasury stock, value	(700)			(700)			(700)
Purchase of treasury stock, shares		(14.2)
Exercise of stock options and share issuances,value	83		83				83
Exercise of stock options and share issuances,shares		2.8
Equity based compensation and other, value	14		14				14
Equity, at end of period at Jun. 30, 2011	$ 9,154		$ 8,532	$ (7,325)	$ 7,985	$ (29)	$ 9,163	$ (9)
Shares issued, at end of period at Jun. 30, 2011		576.7