| Component: (Network and Table) | |
|---|---|
| Network | 004100 - Disclosure - Schedule ll (Details) (http://www.viacom.com/role/DisclosureScheduleLlDetails) |
| Table | Valuation And Qualifying Accounts Disclosure [Table] |
| Reporting Entity [Axis] | 0001339947 (http://www.sec.gov/CIK) |
| Valuation And Qualifying Accounts Disclosure [Line Items] | Period [Axis] | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
2012-10-01 - 2013-09-30 | 2011-10-01 - 2012-09-30 | 2010-10-01 - 2011-09-30 | ||||||||||
| Valuation Allowances And Reserves Type [Axis] | Valuation Allowances And Reserves Type [Axis] | Valuation Allowances And Reserves Type [Axis] | ||||||||||
| Allowance For Doubtful Accounts [Member] | Sales returns and allowances [Member] | Inventory obsolescence reserves [Member] | Deferred tax valuation [Member] | Allowance For Doubtful Accounts [Member] | Sales returns and allowances [Member] | Inventory obsolescence reserves [Member] | Deferred tax valuation [Member] | Allowance For Doubtful Accounts [Member] | Sales returns and allowances [Member] | Inventory obsolescence reserves [Member] | Deferred tax valuation [Member] | |
Beginning of period | 36,000,000 | 282,000,000 | 74,000,000 | 324,000,000 | 49,000,000 | 309,000,000 | 73,000,000 | 222,000,000 | 76,000,000 | 254,000,000 | 73,000,000 | 144,000,000 |
Additions - expense and other | 8,000,000 | 503,000,000 | 3,000,000 | 75,000,000 | 6,000,000 | 595,000,000 | 11,000,000 | 161,000,000 | 9,000,000 | 693,000,000 | 20,000,000 | 94,000,000 |
Deductions | (11,000,000) | (524,000,000) | (2,000,000) | (122,000,000) | (19,000,000) | (622,000,000) | (10,000,000) | (59,000,000) | (36,000,000) | (638,000,000) | (20,000,000) | (16,000,000) |
End of period | 33,000,000 | 261,000,000 | 75,000,000 | 277,000,000 | 36,000,000 | 282,000,000 | 74,000,000 | 324,000,000 | 49,000,000 | 309,000,000 | 73,000,000 | 222,000,000 |