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DEBT (Summary of Debt) (Details) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2014
Dec. 31, 2013
Short-term Debt [Abstract]    
Total short-term debt $ 0us-gaap_ShortTermBorrowings $ 0us-gaap_ShortTermBorrowings
Long Term Debt    
Long-term Debt, Total 2,005,584us-gaap_LongTermDebt 2,522,413us-gaap_LongTermDebt
Less current maturities 150,137us-gaap_LongTermDebtCurrent 170us-gaap_LongTermDebtCurrent
Total long-term debt 1,855,447us-gaap_LongTermDebtNoncurrent 2,522,243us-gaap_LongTermDebtNoncurrent
Estimated fair value of long-term debt 2,113,478us-gaap_DebtInstrumentFairValue 2,820,399us-gaap_DebtInstrumentFairValue
Line of Credit    
Short-term Debt [Abstract]    
Total short-term debt 0us-gaap_ShortTermBorrowings
/ us-gaap_ShortTermDebtTypeAxis
= us-gaap_LineOfCreditMember		 0us-gaap_ShortTermBorrowings
/ us-gaap_ShortTermDebtTypeAxis
= us-gaap_LineOfCreditMember
10.125% notes due 2015    
Long Term Debt    
Long-term Debt, Total 150,973us-gaap_LongTermDebt
/ us-gaap_LongtermDebtTypeAxis
= vmc_TenPointOneTwoFivePercentNotesDueTwentyFifteenMember		 [1] 151,897us-gaap_LongTermDebt
/ us-gaap_LongtermDebtTypeAxis
= vmc_TenPointOneTwoFivePercentNotesDueTwentyFifteenMember		 [1]
6.50% notes due 2016    
Long Term Debt    
Long-term Debt, Total 126,969us-gaap_LongTermDebt
/ us-gaap_LongtermDebtTypeAxis
= vmc_SixPointFiveZeroPercentNotesDueTwentySixteenMember		 [2] 511,627us-gaap_LongTermDebt
/ us-gaap_LongtermDebtTypeAxis
= vmc_SixPointFiveZeroPercentNotesDueTwentySixteenMember		 [2]
6.40% notes due 2017    
Long Term Debt    
Long-term Debt, Total 218,589us-gaap_LongTermDebt
/ us-gaap_LongtermDebtTypeAxis
= vmc_SixPointFourZeroPercentNotesDueTwentySeventeenMember		 [3] 349,907us-gaap_LongTermDebt
/ us-gaap_LongtermDebtTypeAxis
= vmc_SixPointFourZeroPercentNotesDueTwentySeventeenMember		 [3]
7.00% notes due 2018    
Long Term Debt    
Long-term Debt, Total 399,816us-gaap_LongTermDebt
/ us-gaap_LongtermDebtTypeAxis
= vmc_SevenPointZeroZeroPercentNotesDueTwentyEighteenMember		 [4] 399,772us-gaap_LongTermDebt
/ us-gaap_LongtermDebtTypeAxis
= vmc_SevenPointZeroZeroPercentNotesDueTwentyEighteenMember		 [4]
10.375% notes due 2018    
Long Term Debt    
Long-term Debt, Total 249,030us-gaap_LongTermDebt
/ us-gaap_LongtermDebtTypeAxis
= vmc_TenPointThreeSevenFivePercentNotesDueTwentyEighteenMember		 [5] 248,843us-gaap_LongTermDebt
/ us-gaap_LongtermDebtTypeAxis
= vmc_TenPointThreeSevenFivePercentNotesDueTwentyEighteenMember		 [5]
7.50% notes due 2021    
Long Term Debt    
Long-term Debt, Total 600,000us-gaap_LongTermDebt
/ us-gaap_LongtermDebtTypeAxis
= vmc_SevenPointFiveZeroPercentNotesDueTwentyTwentyOneMember		 [6] 600,000us-gaap_LongTermDebt
/ us-gaap_LongtermDebtTypeAxis
= vmc_SevenPointFiveZeroPercentNotesDueTwentyTwentyOneMember		 [6]
8.85% notes due 2021 [Member]    
Long Term Debt    
Long-term Debt, Total 6,000us-gaap_LongTermDebt
/ us-gaap_LongtermDebtTypeAxis
= vmc_EightPointEightFiveNotesDueTwentyTwentyOneMember		 [7] 6,000us-gaap_LongTermDebt
/ us-gaap_LongtermDebtTypeAxis
= vmc_EightPointEightFiveNotesDueTwentyTwentyOneMember		 [7]
Industrial revenue bonds    
Long Term Debt    
Long-term Debt, Total 14,000us-gaap_LongTermDebt
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_MunicipalBondsMember		 [8] 14,000us-gaap_LongTermDebt
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_MunicipalBondsMember		 [8]
7.15% notes due 2037    
Long Term Debt    
Long-term Debt, Total 239,570us-gaap_LongTermDebt
/ us-gaap_LongtermDebtTypeAxis
= vmc_SevenPointOneFivePercentNotesDueTwentyThirtySevenMember		 [9] 239,561us-gaap_LongTermDebt
/ us-gaap_LongtermDebtTypeAxis
= vmc_SevenPointOneFivePercentNotesDueTwentyThirtySevenMember		 [9]
Other Notes    
Long Term Debt    
Long-term Debt, Total $ 637us-gaap_LongTermDebt
/ us-gaap_LongtermDebtTypeAxis
= vmc_OtherNotesMember		 $ 806us-gaap_LongTermDebt
/ us-gaap_LongtermDebtTypeAxis
= vmc_OtherNotesMember
[1] Includes an increase for the unamortized portion of the deferred gain realized upon the August 2011 settlement of interest rate swaps, as follows: December 31, 2014 — $1,068 thousand and December 31, 2013 — $2,082 thousand. Additionally, includes decreases for unamortized discounts as follows: December 31, 2014 — $95 thousand and December 31, 2013 — $185 thousand. The effective interest rate for these notes is 9.58%.
[2] Includes an increase for the unamortized portion of the deferred gain realized upon the August 2011 settlement of interest rate swaps, as follows: December 31, 2014 — $1,968 thousand and December 31, 2013 — $11,627 thousand. The effective interest rate for these notes is 6.00%.
[3] Includes decreases for unamortized discounts, as follows: December 31, 2014 — $44 thousand and December 31, 2013 — $93 thousand. The effective interest rate for these notes is 7.39%.
[4] Includes decreases for unamortized discounts, as follows: December 31, 2014 — $184 thousand and December 31, 2013 — $228 thousand. The effective interest rate for these notes is 7.87%.
[5] Includes decreases for unamortized discounts, as follows: December 31, 2014 — $970 thousand and December 31, 2013 — $1,157 thousand. The effective interest rate for these notes is 10.625%.
[6] The effective interest rate for these notes is 7.75%.
[7] The effective interest rate for this note is 8.88%.
[8] This variable-rate tax-exempt bond is backed by a letter of credit.
[9] Includes decreases for unamortized discounts, as follows: December 31, 2014 — $618 thousand and December 31, 2013 — $627 thousand. The effective interest rate for these notes is 8.05%.