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

No definition available.

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Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

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

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 835

-SubTopic 30

-Section 45

-Paragraph 2

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-Topic 835

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-Section 55

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-URI http://asc.fasb.org/extlink&oid=34725769&loc=d3e28878-108400

+ 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://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 22

-Article 5

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

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-Topic 210

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-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.22(a)(1))

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+ Details

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- Details

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

- Definition

Amount of the required periodic payments applied to principal.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.22)

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-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 22

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+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Fair value amount of debt instrument that was repurchased.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Difference between the fair value of payments made and the carrying amount of debt which is extinguished prior to maturity.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 28

-Subparagraph (b)

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-Name Accounting Standards Codification

-Topic 470

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-Topic 470

-SubTopic 50

-Section 40

-Paragraph 4

-URI http://asc.fasb.org/extlink&oid=6850294&loc=d3e12355-112629

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

The fee, expressed as a percentage of the line of credit facility, for the line of credit facility regardless of whether the facility has been used.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- 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://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.19(b),22(b))

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-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 19, 22

-Article 5

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount of borrowing capacity currently available under the credit facility (current borrowing capacity less the amount of borrowings outstanding).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

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-Subparagraph (SX 210.5-02.19(b),22(b))

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-Number 210

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-Paragraph 19, 22

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Balance Type:	credit
Period Type:	instant

- Definition

The cash outflow during the period from the repayment of aggregate short-term and long-term debt. Excludes payment of capital lease obligations.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

The year the debt instrument is scheduled to be fully repaid.

+ References

No definition available.

+ Details

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Namespace Prefix:	vmc_
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Balance Type:	na
Period Type:	duration

- Definition

A maximum ratio of debt to EBITDA.

+ References

No definition available.

+ Details

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Namespace Prefix:	vmc_
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Balance Type:	na
Period Type:	duration

- Definition

A minimum ratio of EBITDA to net cash interest expense.

+ References

No definition available.

+ Details

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Data Type:	xbrli:pureItemType
Balance Type:	na
Period Type:	duration

- Definition

Other benefit related to debt purchase.

+ References

No definition available.

+ Details

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Namespace Prefix:	vmc_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Premium on redemption of debt.

+ References

No definition available.

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Transaction Cost Related To Termination Of Debt

+ References

No definition available.

+ Details

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Namespace Prefix:	vmc_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
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- Details

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- Details

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DEBT (Narrative) (Details) (USD $)	1 Months Ended	12 Months Ended			1 Months Ended	3 Months Ended	1 Months Ended
DEBT (Narrative) (Details) (USD $)	Mar. 31, 2014	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Jan. 31, 2013	Mar. 31, 2014	Jun. 30, 2013	Dec. 31, 2011
Debt Instrument [Line Items]
Debt instrument face amount								$ 500,000,000us-gaap_DebtInstrumentFaceAmount
Debt purchased, amount	506,366,000us-gaap_DebtInstrumentRepurchaseAmount					506,366,000us-gaap_DebtInstrumentRepurchaseAmount
Interest rate								6.50%
Amount of bank credit facility		500,000,000		500,000,000
Borrowing capacity		446,450,000
Applicable margin for LIBOR based borrowing		1.50%
Total consideration paid for debt	579,659,000us-gaap_RepaymentsOfDebt	672,829,000us-gaap_RepaymentsOfDebt	306,602,000us-gaap_RepaymentsOfDebt	134,780,000us-gaap_RepaymentsOfDebt
Premium paid for purchase of debt	71,829,000vmc_PremiumOnRedemptionOfDebt					71,829,000vmc_PremiumOnRedemptionOfDebt
Transaction cost related to termination of debt	1,464,000
Other benefit related to debt purchase	344,000vmc_OtherBenefitRelatedToDebtPurchase
Cost of debt purchase	72,949,000	72,949,000	0	0
Debt to EBITDA ratio		3.5vmc_DebtToEbitdaRatio
EBITDA to net cash interest expense ratio		3.0vmc_EbitdaToNetCashInterestExpense
Standby Letters of Credit [Member]
Debt Instrument [Line Items]
Applicable margin for LIBOR based borrowing		0.175%
Minimum \| Standby Letters of Credit [Member]
Debt Instrument [Line Items]
Commitment fee		0.25%
Maximum \| Standby Letters of Credit [Member]
Debt Instrument [Line Items]
Commitment fee		0.40%
Medium-term Notes
Debt Instrument [Line Items]
Required periodic principal payment					10,000,000
Interest rate					8.70%
6.50% notes due 2016
Debt Instrument [Line Items]
Debt purchased, amount	374,999,000					374,999,000
Maturity year		2016	2016			2016
Interest rate	6.50%	6.50%	6.50%			6.50%
7.50% notes due 2021
Debt Instrument [Line Items]
Maturity year		2021	2021
Interest rate		7.50%	7.50%
6.30% notes due 2013
Debt Instrument [Line Items]
Required periodic principal payment							140,444,000
Interest rate							6.30%
10.125% notes due 2015
Debt Instrument [Line Items]
Maturity year		2015	2015
Interest rate		10.125%	10.125%
10.375% notes due 2018
Debt Instrument [Line Items]
Maturity year		2018	2018
Interest rate		10.375%	10.375%
7.00% notes due 2018
Debt Instrument [Line Items]
Maturity year		2018	2018
Interest rate		7.00%	7.00%
6.40% notes due 2017
Debt Instrument [Line Items]
Debt purchased, amount	$ 131,367,000					$ 131,367,000
Maturity year		2017	2017			2017
Interest rate	6.40%	6.40%	6.40%			6.40%
7.15% notes due 2037
Debt Instrument [Line Items]
Maturity year		2037	2037
Interest rate		7.15%	7.15%
Line of Credit \| Minimum
Debt Instrument [Line Items]
Applicable margin for LIBOR based borrowing		1.50%
Line of Credit \| Maximum
Debt Instrument [Line Items]
Applicable margin for LIBOR based borrowing		2.25%