Aggregate notional amount specified by the derivative(s). Expressed as an absolute value.

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Article 12

-Section 13

-Sentence Column B

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Amount before tax of unrealized gain (loss) in accumulated other comprehensive income (AOCI) on investments in debt and equity securities classified as available-for-sale.

+ References

No definition available.

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This item represents the gross profit realized on the sale of debt or equity securities categorized neither as held-to-maturity nor trading securities.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 320

-SubTopic 10

-Section 50

-Paragraph 9

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- Definition

Fair value portion of debt instrument payable, including, but not limited to, notes payable and loans payable.

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 825

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-Section 50

-Paragraph 10

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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No definition available.

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- Definition

Number of interest rate derivative instruments held by the entity at the reporting date.

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 815

-SubTopic 10

-Section 50

-Paragraph 1B

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The cash inflow associated with the sale of equity securities classified as available-for-sale securities.

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-Glossary Investing Activities

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Fair Value Measurements - Additional Information (Detail) ¥ in Billions	9 Months Ended
	Jun. 30, 2015 USD ($) Swap	Jun. 30, 2015 JPY (¥) Swap	Sep. 30, 2014 USD ($) Swap	Sep. 30, 2014 JPY (¥) Swap	Jun. 30, 2014 USD ($) Swap	Jun. 30, 2014 JPY (¥) Swap
Derivative [Line Items]
Number of Interest Rate Derivatives Held \| Swap	12	12	13	13	13	13
Fair value of long term debt	$ 6,500,000,000		$ 6,800,000,000		$ 7,000,000,000
Proceeds from Sale of Available-for-sale Securities, Equity	25,000,000
Available-for-sale Securities, Gross Realized Gains	8,000,000
Unrealized Gains
Derivative [Line Items]
Available-for-sale Securities, Accumulated Gross Unrealized Gain (Loss), before Tax	0		0		0
Unrealized Losses [Member]
Derivative [Line Items]
Available-for-sale Securities, Accumulated Gross Unrealized Gain (Loss), before Tax	$ 0		$ 0		$ 0
Cross-Currency Interest Rate Swaps
Derivative [Line Items]
Cross-currency interest rate swaps outstanding \| ¥		¥ 20		¥ 20		¥ 20
Number of Interest Rate Derivatives Held \| Swap	4	4	4	4	4	4