XML 79 R72.htm IDEA: XBRL DOCUMENT v2.4.1.9
Incentive Plans (Narrative) (Details) (USD $)
12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Aug. 30, 2013
Feb. 28, 2013
Dec. 31, 2011
Compensation Related Costs Share Based Payments Disclosure [Line Items]            
Unvested share-based compensation arrangements, compensation costs to be expensed $ 46,024,000us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized          
Unvested share-based compensation arrangements, number of years compensation costs to be expensed 2 years          
Proceeds from exercise of stock options and employee stock purchase plans 210,000us-gaap_ProceedsFromStockOptionsExercised 3,409,000us-gaap_ProceedsFromStockOptionsExercised 12,324,000us-gaap_ProceedsFromStockOptionsExercised      
Income tax benefits realized for the tax deductions from option exercises 5,364,000us-gaap_DeferredTaxExpenseFromStockOptionsExercised 7,435,000us-gaap_DeferredTaxExpenseFromStockOptionsExercised 5,920,000us-gaap_DeferredTaxExpenseFromStockOptionsExercised      
Granted restricted stock, vesting scheme Under the 2012 Long-Term Plan and the 2007 Long-Term Plan, one-half of each grant is generally exercisable after two years and the remainder after three years.          
Total intrinsic value of options exercised 12,003,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue 25,284,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue 17,197,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue      
Reduction in stock option exercise price         $ 2.50mur_ReductionInPerShareExercisePrice  
Income statement effect of reduced exercise price   6,454,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardPlanModificationIncrementalCompensationCost        
Percentage increase in number of outstanding stock options       10.70%mur_ShareBasedCompensationArrangementByShareBasedPaymentAwardPercentageIncreaseInOutstandingShares    
Percentage decrease in exercise price of stock options       10.70%mur_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisablePercentage    
Percentage increase in number of outstanding stock units       10.70%mur_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsPercentageIncreaseInOutstandingShares    
Performance units outstanding 5,602,250us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber          
Incentive compensation plan expense 38,000,000mur_IncentiveCompensationPlanExpense 53,250,000mur_IncentiveCompensationPlanExpense 32,417,000mur_IncentiveCompensationPlanExpense      
Maximum [Member]            
Compensation Related Costs Share Based Payments Disclosure [Line Items]            
Option granted to date, term of years 7 years          
2012 Long-Term Plan [Member]            
Compensation Related Costs Share Based Payments Disclosure [Line Items]            
Long term plan expiration year 2022          
Maximum number of shares available for issuance 8,700,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized
/ us-gaap_PlanNameAxis
= mur_LongTermIncentivePlanTwentyTwelveMember
         
Maximum number of shares available for issuance, annual rate 1.00%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardPercentageOfOutstandingStockMaximum
/ us-gaap_PlanNameAxis
= mur_LongTermIncentivePlanTwentyTwelveMember
         
Number of shares remained available   5,481,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant
/ us-gaap_PlanNameAxis
= mur_LongTermIncentivePlanTwentyTwelveMember
       
2012 Long-Term Plan and the 2007 Long-Term Plan [Member]            
Compensation Related Costs Share Based Payments Disclosure [Line Items]            
Option granted to date, term of years 7 years          
Stock Options [Member]            
Compensation Related Costs Share Based Payments Disclosure [Line Items]            
Proceeds from exercise of stock options and employee stock purchase plans   2,395,000us-gaap_ProceedsFromStockOptionsExercised
/ us-gaap_AwardTypeAxis
= us-gaap_StockOptionMember
10,375,000us-gaap_ProceedsFromStockOptionsExercised
/ us-gaap_AwardTypeAxis
= us-gaap_StockOptionMember
     
Stock-based compensation, fair value assumption model Black-Scholes option pricing model          
Performance units outstanding 5,602,250us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber
/ us-gaap_AwardTypeAxis
= us-gaap_StockOptionMember
6,006,585us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber
/ us-gaap_AwardTypeAxis
= us-gaap_StockOptionMember
5,907,359us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber
/ us-gaap_AwardTypeAxis
= us-gaap_StockOptionMember
    5,434,228us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber
/ us-gaap_AwardTypeAxis
= us-gaap_StockOptionMember
Stock Options [Member] | Maximum [Member]            
Compensation Related Costs Share Based Payments Disclosure [Line Items]            
Stock-based compensation, vesting period 3 years          
Stock Options [Member] | Minimum [Member]            
Compensation Related Costs Share Based Payments Disclosure [Line Items]            
Stock-based compensation, vesting period 2 years          
Time-Lapse Restricted Stock and Restricted Stock Units [Member]            
Compensation Related Costs Share Based Payments Disclosure [Line Items]            
Granted restricted stock, valuation     $ 59.33us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue
/ us-gaap_AwardTypeAxis
= mur_TimeLapseRestrictedStockMember
     
Time-Lapse Restricted Stock and Restricted Stock Units [Member] | Maximum [Member]            
Compensation Related Costs Share Based Payments Disclosure [Line Items]            
Granted restricted stock, valuation $ 60.85us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue
/ us-gaap_AwardTypeAxis
= mur_TimeLapseRestrictedStockMember
/ us-gaap_RangeAxis
= us-gaap_MaximumMember
$ 69.67us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue
/ us-gaap_AwardTypeAxis
= mur_TimeLapseRestrictedStockMember
/ us-gaap_RangeAxis
= us-gaap_MaximumMember
       
Time-Lapse Restricted Stock and Restricted Stock Units [Member] | Minimum [Member]            
Compensation Related Costs Share Based Payments Disclosure [Line Items]            
Granted restricted stock, valuation $ 55.20us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue
/ us-gaap_AwardTypeAxis
= mur_TimeLapseRestrictedStockMember
/ us-gaap_RangeAxis
= us-gaap_MinimumMember
$ 60.30us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue
/ us-gaap_AwardTypeAxis
= mur_TimeLapseRestrictedStockMember
/ us-gaap_RangeAxis
= us-gaap_MinimumMember
       
Performance Based Restricted Stock [Member]            
Compensation Related Costs Share Based Payments Disclosure [Line Items]            
Stock-based compensation, vesting period 3 years          
Stock-based compensation, fair value assumption model Monte Carlo valuation model          
Performance Based Restricted Stock [Member] | Maximum [Member]            
Compensation Related Costs Share Based Payments Disclosure [Line Items]            
Granted restricted stock, valuation $ 51.30us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue
/ us-gaap_AwardTypeAxis
= mur_PerformanceBasedRestrictedStockMember
/ us-gaap_RangeAxis
= us-gaap_MaximumMember
$ 68.01us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue
/ us-gaap_AwardTypeAxis
= mur_PerformanceBasedRestrictedStockMember
/ us-gaap_RangeAxis
= us-gaap_MaximumMember
$ 63.64us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue
/ us-gaap_AwardTypeAxis
= mur_PerformanceBasedRestrictedStockMember
/ us-gaap_RangeAxis
= us-gaap_MaximumMember
     
Performance Based Restricted Stock [Member] | Minimum [Member]            
Compensation Related Costs Share Based Payments Disclosure [Line Items]            
Granted restricted stock, valuation $ 33.90us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue
/ us-gaap_AwardTypeAxis
= mur_PerformanceBasedRestrictedStockMember
/ us-gaap_RangeAxis
= us-gaap_MinimumMember
$ 39.50us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue
/ us-gaap_AwardTypeAxis
= mur_PerformanceBasedRestrictedStockMember
/ us-gaap_RangeAxis
= us-gaap_MinimumMember
$ 54.90us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue
/ us-gaap_AwardTypeAxis
= mur_PerformanceBasedRestrictedStockMember
/ us-gaap_RangeAxis
= us-gaap_MinimumMember
     
Employee Stock Purchase Plan [Member]            
Compensation Related Costs Share Based Payments Disclosure [Line Items]            
Number of shares remained available   280,202us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant
/ us-gaap_AwardTypeAxis
= mur_EmployeeStockPurchasePlanMember
       
Compensation expenses 55,000us-gaap_ShareBasedCompensation
/ us-gaap_AwardTypeAxis
= mur_EmployeeStockPurchasePlanMember
143,000us-gaap_ShareBasedCompensation
/ us-gaap_AwardTypeAxis
= mur_EmployeeStockPurchasePlanMember
272,000us-gaap_ShareBasedCompensation
/ us-gaap_AwardTypeAxis
= mur_EmployeeStockPurchasePlanMember
     
Salary that can be withheld by eligible employee for stock purchase 10.00%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardMaximumEmployeeSubscriptionRate
/ us-gaap_AwardTypeAxis
= mur_EmployeeStockPurchasePlanMember
         
Stock purchase price, percentage of the fair value of the stock 90.00%us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardPurchasePriceOfCommonStockPercent
/ us-gaap_AwardTypeAxis
= mur_EmployeeStockPurchasePlanMember
         
Employee Stock purchase plan, termination date The ESPP will terminate on the earlier of the date that employees have purchased all 980,000 authorized shares or June 30, 2017.          
Employee stock purchases, shares 6,739us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardSharesPurchasedForAward
/ us-gaap_AwardTypeAxis
= mur_EmployeeStockPurchasePlanMember
16,020us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardSharesPurchasedForAward
/ us-gaap_AwardTypeAxis
= mur_EmployeeStockPurchasePlanMember
24,418us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardSharesPurchasedForAward
/ us-gaap_AwardTypeAxis
= mur_EmployeeStockPurchasePlanMember
     
Employee stock purchases, per share $ 56.22mur_PurchaseOfStockAveragePricePerShare
/ us-gaap_AwardTypeAxis
= mur_EmployeeStockPurchasePlanMember
$ 54.14mur_PurchaseOfStockAveragePricePerShare
/ us-gaap_AwardTypeAxis
= mur_EmployeeStockPurchasePlanMember
$ 48.54mur_PurchaseOfStockAveragePricePerShare
/ us-gaap_AwardTypeAxis
= mur_EmployeeStockPurchasePlanMember
     
Compensation costs estimation Compensation costs related to the ESPP are estimated based on the value of the 10% discount and the fair value of the option that provides for the refund of participant withholdings          
Fair value per share issued under ESPP $ 6.49mur_ShareBasedCompensationArrangementByShareBasedPaymentAwardStockPurchaseRightsGrantsInPeriodWeightedAverageGrantDateFairValue
/ us-gaap_AwardTypeAxis
= mur_EmployeeStockPurchasePlanMember
$ 6.72mur_ShareBasedCompensationArrangementByShareBasedPaymentAwardStockPurchaseRightsGrantsInPeriodWeightedAverageGrantDateFairValue
/ us-gaap_AwardTypeAxis
= mur_EmployeeStockPurchasePlanMember
$ 7.30mur_ShareBasedCompensationArrangementByShareBasedPaymentAwardStockPurchaseRightsGrantsInPeriodWeightedAverageGrantDateFairValue
/ us-gaap_AwardTypeAxis
= mur_EmployeeStockPurchasePlanMember
     
Employee Stock Purchase Plan [Member] | Maximum [Member]            
Compensation Related Costs Share Based Payments Disclosure [Line Items]            
Maximum number of shares available for issuance 980,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized
/ us-gaap_AwardTypeAxis
= mur_EmployeeStockPurchasePlanMember
/ us-gaap_RangeAxis
= us-gaap_MaximumMember
         
Performance Units [Member]            
Compensation Related Costs Share Based Payments Disclosure [Line Items]            
Share based compensation settled in cash $ 9,667,000mur_ShareBasedCompensatioSettledInCash
/ us-gaap_AwardTypeAxis
= mur_PerformanceBasedUnitsMember
$ 9,436,000mur_ShareBasedCompensatioSettledInCash
/ us-gaap_AwardTypeAxis
= mur_PerformanceBasedUnitsMember
$ 552,000mur_ShareBasedCompensatioSettledInCash
/ us-gaap_AwardTypeAxis
= mur_PerformanceBasedUnitsMember