CONSOLIDATED BALANCE SHEETS (USD $) In Millions, except Per Share data, unless otherwise specified	Mar. 31, 2012	Sep. 30, 2011
Assets Current Abstract
Cash and cash equivalents	$ 1,135	$ 1,021
Receivables, net	2,638	2,732
Inventory Net	841	828
Deferred Tax Assets, Net, Current	35	41
Prepaid and other assets	318	639
Total current assets	4,967	5,261
Property and equipment - net	1,048	1,057
Inventory Noncurrent	4,213	4,239
Goodwill	11,041	11,064
Deferred tax assets, net	12	0
Intangibles, net	356	392
Other assets	790	788
Total assets	22,427	22,801
Current liabilities [Abstract]:
Accounts payable	313	427
Accrued expenses	936	1,152
Participants' share and residuals	1,104	1,158
Program rights obligations	532	475
Deferred revenue	215	187
Current portion of debt	21	23
Other liabilities	1,042	520
Total current liabilities	4,163	3,942
Noncurrent portion of debt	7,757	7,342
Participants' share and residuals, noncurrent	489	487
Program rights obligations, noncurrent	691	771
Deferred tax liabilities, net	0	123
Other liabilities	1,384	1,351
Redeemable noncontrolling interest	151	152
Commitments and contingencies (Note 15)	0	0
Viacom Stockholders' equity
Common stock, value	1	1
Additional paid-in-capital	8,673	8,614
Treasury stock	(9,625)	(8,225)
Treasury stock held	238.1	207.2
Retained earnings	8,947	8,418
Accumulated other comprehensive income (loss)	(193)	(164)
Total Viacom stockholders' equity	7,803	8,644
Noncontrolling interests	(11)	(11)
Total equity	7,792	8,633
Total liabilities and equity	22,427	22,801
Common stock, Class A [Member]
Viacom Stockholders' equity
Common stock, par value	$ 0.001	$ 0.001
Common Stock Authorized	375.0	375.0
Common stock, outstanding	51.4	51.4
Common stock, Class B [Member]
Viacom Stockholders' equity
Common stock, par value	$ 0.001	$ 0.001
Common Stock Authorized	5,000.0	5,000.0
Common stock, outstanding	478.8	506.9
Common Stock/APIC
Viacom Stockholders' equity
Total equity	8,674	8,615
Treasury Stock
Viacom Stockholders' equity
Total equity	(9,625)	(8,225)
Retained Earnings
Viacom Stockholders' equity
Total equity	8,947	8,418
Accumulated Other Comprehensive Income (Loss)
Viacom Stockholders' equity
Total equity	(193)	(164)
Total Viacom Stockholders' Equity
Viacom Stockholders' equity
Total equity	7,803	8,644
Noncontrolling Interests
Viacom Stockholders' equity
Total equity	$ (11)	$ (11)