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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-URI http://asc.fasb.org/extlink&oid=114775744&loc=d3e28551-108399

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
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-Topic 835
-SubTopic 30
-Section 55
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+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
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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Balance Type:	na
Period Type:	instant

- 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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Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Date when the debt instrument is scheduled to be fully repaid, in CCYY-MM-DD format.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.22(a)(2))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (bbb)(2)
-URI http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258

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Balance Type:	na
Period Type:	duration

- Definition

Amount of unused borrowing capacity under the long-term financing arrangement that is available to the entity as of the balance sheet date.

+ 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(b))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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Balance Type:	credit
Period Type:	instant

- Definition

Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

+ 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
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Balance Type:	credit
Period Type:	instant

- Definition

The cash inflow from additional borrowings, net of cash paid to third parties in connection with debt origination.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 14
-Subparagraph (b)
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Period Type:	duration

Debt Narrative (Details) - USD ($) $ in Millions	3 Months Ended
Debt Narrative (Details) - USD ($) $ in Millions	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019
Debt Instrument [Line Items]
Debt Instrument, Face Amount	$ 5,500	$ 3,500	$ 1,500
Proceeds from Debt, Net of Issuance Costs	5,442	3,454	1,451
Debt Instrument, Unused Borrowing Capacity, Amount	6,620
Two Point Eight Percent due on March 1, 2024 [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount			$ 400
Debt Instrument, Maturity Date			Mar. 01, 2024
Debt Instrument, Interest Rate, Stated Percentage			2.80%
Three Point Two Percent due on March 1, 2029 [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount		$ 600	$ 400
Debt Instrument, Maturity Date		Mar. 01, 2029	Mar. 01, 2029
Debt Instrument, Interest Rate, Stated Percentage		3.20%	3.20%
Three Point Six Percent Due May 1, 2034 [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount		$ 850
Debt Instrument, Maturity Date		May 01, 2034
Debt Instrument, Interest Rate, Stated Percentage		3.60%
Three Point Nine Percent Due May 1, 2049 [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount		$ 800
Debt Instrument, Maturity Date		May 01, 2049
Debt Instrument, Interest Rate, Stated Percentage		3.90%
Three Point Five Percent due on March 1, 2039 [Member] [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount			$ 400
Debt Instrument, Maturity Date			Mar. 01, 2039
Debt Instrument, Interest Rate, Stated Percentage			3.50%
Three Point Eight Two Five Percent due on March 1, 2059 [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount			$ 300
Debt Instrument, Maturity Date			Mar. 01, 2059
Debt Instrument, Interest Rate, Stated Percentage			3.825%
Two Point Seven Percent due on May 1, 2022 [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount		$ 600
Debt Instrument, Maturity Date		May 01, 2022
Debt Instrument, Interest Rate, Stated Percentage		2.70%
Three Point One Percent Due May 1, 2026 [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount		$ 650
Debt Instrument, Maturity Date		May 01, 2026
Debt Instrument, Interest Rate, Stated Percentage		3.10%
Two Point Three Percent due on August 1, 2021 [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount	$ 750
Debt Instrument, Maturity Date	Aug. 01, 2021
Debt Instrument, Interest Rate, Stated Percentage	2.30%
Two Point Seven Percent due on February 1, 2027 [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount	$ 1,000
Debt Instrument, Maturity Date	Feb. 01, 2027
Debt Instrument, Interest Rate, Stated Percentage	2.70%
Two Point Ninety-Five Percent due on February 1, 2030 [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount	$ 750
Debt Instrument, Maturity Date	Feb. 01, 2030
Debt Instrument, Interest Rate, Stated Percentage	2.95%
Three Point Two Five Percent due on February 1, 2035 [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount	$ 750
Debt Instrument, Maturity Date	Feb. 01, 2035
Debt Instrument, Interest Rate, Stated Percentage	3.25%
Three Point Seven Five Percent due on February 1, 2050 [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount	$ 1,250
Debt Instrument, Maturity Date	Feb. 01, 2050
Debt Instrument, Interest Rate, Stated Percentage	3.75%
Three Point Nine Five Percent due on August 1, 2059 [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount	$ 1,000
Debt Instrument, Maturity Date	Aug. 01, 2059
Debt Instrument, Interest Rate, Stated Percentage	3.95%
Short Term Credit Facility [Member] \| Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity		$ 1,500