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Fair Value Measurements and Investments (Tables)

6 Months Ended

Mar. 31, 2014

Fair Value Disclosures [Abstract]

Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis

Assets and Liabilities Measured at Fair Value on a Recurring Basis

	Fair Value Measurements Using Inputs Considered as
	Level 1								Level 2								Level 3
	March 31, 2014				September 30, 2013				March 31, 2014				September 30, 2013				March 31, 2014				September 30, 2013
	(in millions)
Assets
Cash equivalents and restricted cash:
Money market funds	$	1,763			$	1,071
Commercial paper									$	43			$	51
Investment securities, trading:
Equity securities	82				75
Investment securities, available-for-sale:
U.S. government-sponsored debt securities									2,480				2,704
U.S. Treasury securities	1,552				1,673
Equity securities	131				101
Corporate debt securities									488				269
Auction rate securities																	$	7			$	7
Prepaid and other current assets:
Foreign exchange derivative instruments									16				23
Total	$	3,528			$	2,920			$	3,027			$	3,047			$	7			$	7
Liabilities
Accrued liabilities:
Visa Europe put option																	$	145			$	145
Foreign exchange derivative instruments									$	20			$	15
Total	$	—			$	—			$	20			$	15			$	145			$	145

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- Definition

Tabular disclosure of assets and liabilities, including [financial] instruments measured at fair value that are classified in stockholders' equity, if any, that are measured at fair value on a recurring basis. The disclosures contemplated herein include the fair value measurements at the reporting date by the level within the fair value hierarchy in which the fair value measurements in their entirety fall, segregating fair value measurements using quoted prices in active markets for identical assets (Level 1), significant other observable inputs (Level 2), and significant unobservable inputs (Level 3).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 820

-SubTopic 10

-Section 50

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=25499696&loc=d3e19190-110258

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