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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- Definition

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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- Definition

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

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 10
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=49121117&loc=d3e13433-108611

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 12
-URI http://asc.fasb.org/extlink&oid=49121117&loc=d3e13476-108611

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- Definition

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.

+ References

No definition available.

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- Definition

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

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 1B
-URI http://asc.fasb.org/extlink&oid=56946850&loc=SL5580258-113959

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 1A
-Subparagraph (d)
-URI http://asc.fasb.org/extlink&oid=56946850&loc=SL5579245-113959

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Fair Value Measurements - Additional Information (Detail) ¥ in Billions	Jun. 30, 2016 USD ($) Swap	Jun. 30, 2016 JPY (¥) Swap	Sep. 30, 2015 USD ($) Swap	Sep. 30, 2015 JPY (¥) Swap	Jun. 30, 2015 USD ($) Swap	Jun. 30, 2015 JPY (¥) Swap
Derivative [Line Items]
Number of Interest Rate Derivatives Held \| Swap	8	8	12	12	12	12
Fair value of long term debt	$ 6,200,000,000		$ 6,700,000,000		$ 6,500,000,000
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]
Notional amount \| ¥		¥ 5		¥ 20		¥ 20
Number of Interest Rate Derivatives Held \| Swap	1	1	4	4	4	4
Foreign Currency Denominated Debt [Member]
Derivative [Line Items]
Notional amount \| ¥		¥ 37		¥ 0		¥ 0