Restructuring and Programming Charges Table (Details) - USD ($) $ in Millions		3 Months Ended		6 Months Ended
		Mar. 31, 2017	Mar. 31, 2016	Mar. 31, 2017	Mar. 31, 2016
Restructuring Cost and Reserve [Line Items]
Restructuring Charges		$ 174		$ 216
Programming inventory restructure		106		106
Restructuring and programming charges		280	$ 0	322	$ 0
Severance [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Charges	[1]	156		198
Asset Impairment [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Charges		18		18
Allocated Share-Based Compensation Expense [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Charges		13		20
Media Networks
Restructuring Cost and Reserve [Line Items]
Restructuring Charges		115		148
Programming inventory restructure		106		106
Restructuring and programming charges		221		254
Media Networks | Severance [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Charges		97		130
Media Networks | Asset Impairment [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Charges		18		18
Filmed Entertainment
Restructuring Cost and Reserve [Line Items]
Restructuring Charges		47		48
Programming inventory restructure		0		0
Restructuring and programming charges		47		48
Filmed Entertainment | Severance [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Charges		47		48
Filmed Entertainment | Asset Impairment [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Charges		0		0
Corporate
Restructuring Cost and Reserve [Line Items]
Restructuring Charges		12		20
Programming inventory restructure		0		0
Restructuring and programming charges		12		20
Corporate | Severance [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Charges		12		20
Corporate | Asset Impairment [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Charges		$ 0		$ 0

[1] Includes equity-based compensation expense of $13 million in the quarter and $20 million in the six months ended March 31, 2017.