CONSOLIDATED STATEMENTS OF EARNINGS (unaudited) - USD ($) shares in Millions, $ in Millions	3 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Income Statement [Abstract]
Revenues	$ 3,154	$ 3,344
Expenses:
Operating	1,593	1,623
Selling, general and administrative	667	731
Depreciation and amortization	55	55
Total expenses	2,315	2,409
Operating income	839	935
Interest expense, net	(155)	(160)
Equity in net earnings of investee companies	31	33
Other items, net	2	(18)
Earnings before provision for income taxes	717	790
Provision for income taxes	(256)	(277)
Net earnings (Viacom and noncontrolling interests)	461	513
Net earnings attributable to noncontrolling interests	(12)	(13)
Net earnings attributable to Viacom	$ 449	$ 500
Earnings Per Share [Abstract]
Basic earnings per share attributable to Viacom	$ 1.13	$ 1.22
Diluted earnings per share attributable to Viacom	$ 1.13	$ 1.20
Weighted average number of common shares outstanding:
Basic (shares)	396.6	410.6
Diluted (shares)	398.4	416.1
Dividends declared per share of Class A and Class B common stock	$ 0.4	$ 0.33