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Loans Payable, Long-Term Debt and Leases - Debt Narrative (Details)	1 Months Ended
	Mar. 31, 2019 USD ($)
Debt Instrument [Line Items]
Face amount of debt	$ 5,000,000,000.0
Net proceeds from offering	5,000,000,000.0
2.90% Notes Due 2024
Debt Instrument [Line Items]
Face amount of debt	$ 750,000,000
Stated interest rate (as percent)	2.90%
3.40% Notes Due 2029
Debt Instrument [Line Items]
Face amount of debt	$ 1,750,000,000
Stated interest rate (as percent)	3.40%
3.90% Notes Due 2039
Debt Instrument [Line Items]
Face amount of debt	$ 1,000,000,000.0
Stated interest rate (as percent)	3.90%
4.00% Notes Due 2049
Debt Instrument [Line Items]
Face amount of debt	$ 1,500,000,000
Stated interest rate (as percent)	4.00%

X

- 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=114775744&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=6877327&loc=d3e13212-122682

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+ References

No definition available.

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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=118932676&loc=d3e3255-108585

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