Debt - Debt Issuances (Details)	3 Months Ended
Mar. 31, 2020 USD ($)
Debt Instrument [Line Items]
Principal Amount Issued	$ 5,885,000,000
Proceeds from long-term borrowings	5,846,000,000
Verizon 3.600% notes due 2060
Debt Instrument [Line Items]
Principal Amount Issued	2,385,000,000
Proceeds from long-term borrowings	$ 2,369,000,000
Stated interest rate on debt instrument	3.60%
Verizon 3.000% notes due 2027
Debt Instrument [Line Items]
Principal Amount Issued	$ 750,000,000
Proceeds from long-term borrowings	$ 747,000,000
Stated interest rate on debt instrument	3.00%
Verizon 3.150% notes due 2030
Debt Instrument [Line Items]
Principal Amount Issued	$ 1,500,000,000
Proceeds from long-term borrowings	$ 1,489,000,000
Stated interest rate on debt instrument	3.15%
Verizon 4.000% notes due 2050
Debt Instrument [Line Items]
Principal Amount Issued	$ 1,250,000,000
Proceeds from long-term borrowings	$ 1,241,000,000
Stated interest rate on debt instrument	4.00%

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
-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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- Definition

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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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