Debt Narrative (Details) - USD ($) $ in Millions	3 Months Ended
Jun. 30, 2020	Mar. 31, 2020
Debt Instrument [Line Items]
Debt Instrument, Face Amount	$ 25,000
Proceeds from Debt, Net of Issuance Costs	$ 24,802
Line of Credit Facility, Maximum Borrowing Capacity		$ 13,825
Four Point Five Zero Eight Percent due May 1, 2023 [Member]
Debt Instrument [Line Items]
Debt Instrument, Maturity Date	May 01, 2023
Debt Instrument, Interest Rate, Stated Percentage	4.508%
Debt Instrument, Face Amount	$ 3,000
Four Point Eight Seven Five Percent due May 1, 2025 [Member]
Debt Instrument [Line Items]
Debt Instrument, Maturity Date	May 01, 2025
Debt Instrument, Interest Rate, Stated Percentage	4.875%
Debt Instrument, Face Amount	$ 3,500
Five Point Zero Four Percent due May 1, 2027 [Member]
Debt Instrument [Line Items]
Debt Instrument, Maturity Date	May 01, 2027
Debt Instrument, Interest Rate, Stated Percentage	5.04%
Debt Instrument, Face Amount	$ 2,000
Five Point One Five Percent due May 1, 2030 [Member]
Debt Instrument [Line Items]
Debt Instrument, Maturity Date	May 01, 2030
Debt Instrument, Interest Rate, Stated Percentage	5.15%
Debt Instrument, Face Amount	$ 4,500
Five Point Seven Zero Five Percent due May 1, 2040 [Member]
Debt Instrument [Line Items]
Debt Instrument, Maturity Date	May 01, 2040
Debt Instrument, Interest Rate, Stated Percentage	5.705%
Debt Instrument, Face Amount	$ 3,000
Five Point Eight Zero Five Percent due May 1, 2050 [Member]
Debt Instrument [Line Items]
Debt Instrument, Maturity Date	May 01, 2050
Debt Instrument, Interest Rate, Stated Percentage	5.805%
Debt Instrument, Face Amount	$ 5,500
Five Point Nine Three Percent due May 1, 2060 [Member]
Debt Instrument [Line Items]
Debt Instrument, Maturity Date	May 01, 2060
Debt Instrument, Interest Rate, Stated Percentage	5.93%
Debt Instrument, Face Amount	$ 3,500
Delayed Draw Term Loan Facility
Debt Instrument [Line Items]
Debt Instrument, Maturity Date		Feb. 06, 2022
Proceeds from Long-term Lines of Credit		$ 13,825
Minimum \| Delayed Draw Term Loan Facility
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate		0.75%
Maximum \| Delayed Draw Term Loan Facility
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate		1.25%

Percentage points added to the reference rate to compute the variable rate on the debt instrument.

No definition available.

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- Definition

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

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=119993939&loc=d3e28551-108399

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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- 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=120391452&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

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=120391452&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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- 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
-Subparagraph (SX 210.5-02.19(b),22(b))
-URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

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- 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)
-URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3255-108585

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- Definition

The cash inflow from a contractual arrangement with the lender, including letter of credit, standby letter of credit and revolving credit arrangements, under which borrowings can be made up to a specific amount at any point in time with maturities due beyond one year or the operating cycle, if longer.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 14
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3255-108585

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