Face (par) amount of debt instrument at time of issuance.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
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Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 55
-Paragraph 8
-URI http://asc.fasb.org/extlink&oid=114775985&loc=d3e28878-108400

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Period Type:	instant

- Definition

Contractual interest rate for funds borrowed, under the debt agreement.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.22(a)(1))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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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

Fair value amount of debt instrument that was repurchased.

+ References

No definition available.

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Balance Type:	debit
Period Type:	instant

- Definition

Face (par) amount of the original debt instrument that was repurchased.

+ References

No definition available.

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- Definition

The difference between the reacquisition price and the net carrying amount of the extinguished debt recognized currently as a component of income in the period of extinguishment, net of tax.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 50
-Section 40
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=117329964&loc=d3e12317-112629

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- Definition

Amount after unamortized (discount) premium and debt issuance costs of long-term debt classified as noncurrent and excluding amounts to be repaid within one year or the normal operating cycle, if longer. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
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-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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Debt - Additional Information (Detail) € in Millions, $ in Millions	3 Months Ended
	Jun. 30, 2019 USD ($)	Mar. 31, 2019 USD ($)	Jun. 30, 2019 EUR (€)	Sep. 30, 2018 USD ($)
Debt Instrument [Line Items]
Principal amount	$ 1,100
Carrying value	18,016			$ 18,894
Repurchase amount	1,169
Gain (loss) on extinguishment of debt	(57)
Long-term Debt
Debt Instrument [Line Items]
Carrying value	$ 1,112
Notes 0.174% due June 4, 2021 [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	0.174%		0.174%
Notes 0.174% due June 4, 2021 [Member] \| Euro Member Countries, Euro
Debt Instrument [Line Items]
Debt Instrument, Face Amount \| €			€ 600
Notes 0.174% due June 4, 2021 [Member] \| United States of America, Dollars
Debt Instrument [Line Items]
Debt Instrument, Face Amount	$ 672
Notes 0.632% due June 4, 2023
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	0.632%		0.632%
Notes 0.632% due June 4, 2023 \| Euro Member Countries, Euro
Debt Instrument [Line Items]
Debt Instrument, Face Amount \| €			€ 800
Notes 0.632% due June 4, 2023 \| United States of America, Dollars
Debt Instrument [Line Items]
Debt Instrument, Face Amount	$ 896
Notes 1.208% due June 4, 2026
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	1.208%		1.208%
Notes 1.208% due June 4, 2026 \| Euro Member Countries, Euro
Debt Instrument [Line Items]
Debt Instrument, Face Amount \| €			€ 600
Notes 1.208% due June 4, 2026 \| United States of America, Dollars
Debt Instrument [Line Items]
Debt Instrument, Face Amount	$ 672
Notes 0.368% due June 6, 2019
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	0.368%		0.368%
Notes 0.368% due June 6, 2019 \| Euro Member Countries, Euro
Debt Instrument [Line Items]
Principal amount \| €			€ 1,000
Notes 0.368% due June 6, 2019 \| United States of America, Dollars
Debt Instrument [Line Items]
Principal amount	$ 1,120
Senior Notes \| Floating Rate Notes Due December 29, 2020
Debt Instrument [Line Items]
Principal amount		$ 250
Carrying value		249
Repurchase amount		250
Gain (loss) on extinguishment of debt		$ (1)