CONSOLIDATED STATEMENTS OF CHANGES IN EQUITY (USD $) In Millions, unless otherwise specified		Total USD ($)		Class A common stock	Class B common stock	Class C common stock	Additional Paid-in Capital USD ($)	Accumulated Income USD ($)	Accumulated Other Comprehensive Income USD ($)
Beginning Balance at Sep. 30, 2013		$ 26,870					$ 18,875	$ 7,974	$ 21
Beginning Balance (in shares) at Sep. 30, 2013				508	245	27
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income		1,407	[1],[2]					1,407
Other comprehensive income, net of tax		22							22
Comprehensive income		1,429
Issuance of restricted stock awards (in shares)	[3]			0
Conversion of class C common stock upon sale into public market (in shares)				(1)		(1)
Share-based compensation		45					45
Excess tax benefit for share-based compensation		54					54
Cash proceeds from exercise of stock options (in shares)				1
Cash proceeds from exercise of stock options		38					38
Restricted stock instruments settled in cash for taxes shares (in shares)	[4]			0
Restricted stock and performance shares settled in cash for taxes(2)	[4]	(77)					(77)
Cash dividends declared and paid, at a quarterly amount of $0.40 per as-converted share (Note 7)		(254)						(254)
Repurchase of class A common stock (Note 7) (in shares)		(5)	[5]	(5)
Repurchase of class A common stock (Note 7)		(1,091)					(233)	(858)
Ending Balance at Dec. 31, 2013		$ 27,014					$ 18,702	$ 8,269	$ 43
Ending Balance (in shares) at Dec. 31, 2013				505	245	26

[1] Net income is allocated based on proportional ownership on an as-converted basis. The weighted-average number of shares of as-converted class B common stock used in the income allocation was 103 million for the three months ended December 31, 2013 and December 31, 2012.

[2] Figures in the table may not recalculate exactly due to rounding. Earnings per share is calculated based on whole numbers, not the rounded numbers presented.

[3] Increase in class A common stock is less than 1 million shares.

[4] Decrease in class A common stock is less than 1 million shares.

[5] All shares repurchased in the open market have been retired and constitute authorized but unissued shares.