DEBT - Additional Information (Detail)	6 Months Ended
	Jun. 30, 2015 USD ($)	Jul. 22, 2015 USD ($)	Jul. 08, 2015 USD ($)	Dec. 31, 2014 USD ($)
Debt Disclosure [Line Items]
Minimum net worth requirement	$ 2,140,323,000
Revolving facility and other short-term borrowings	596,740,000			$ 164,741,000
Senior notes	800,000,000			800,000,000
Series A Senior Notes [Member]
Debt Disclosure [Line Items]
Senior notes	$ 150,000,000
Semi annually fixed rate payable	4.15%
Month and year senior note matures	2017-12
Series B Senior Notes [Member]
Debt Disclosure [Line Items]
Senior notes	$ 225,000,000
Semi annually fixed rate payable	4.57%
Month and year senior note matures	2019-12
Series C Senior Notes [Member]
Debt Disclosure [Line Items]
Senior notes	$ 275,000,000
Semi annually fixed rate payable	5.15%
Month and year senior note matures	2022-12
Series D Senior Notes [Member]
Debt Disclosure [Line Items]
Senior notes	$ 150,000,000
Semi annually fixed rate payable	5.30%
Month and year senior note matures	2024-12
Uncommitted Credit Facility [Member]
Debt Disclosure [Line Items]
Line of credit facility, borrowing and financial letter of credit sublimit	$ 440,000,000
Revolving facility and other short-term borrowings	237,740,000
Amount outstanding under credit facility	1,207,918,000
Available borrowing capacity under credit facility	2,130,250,000
Remaining borrowing capacity under credit facility	$ 201,554,000
Weighted average interest rate	1.20%
Credit facility total capacity	$ 3,575,908,000
Line of credit facility, current borrowing capacity net of letters of credit	439,294,000
Reduction of borrowing capacity amount due to letters of credit utilization	$ 706,000
Secured Debt [Member]
Debt Disclosure [Line Items]
Debt Instrument, term	6 years
Unsecured term loan	$ 48,081,000
Future annual maturities for the remainder of 2015	3,023,000
Future annual maturities for 2016	6,196,000
Future annual maturities for 2017	6,401,000
Future annual maturities for 2018	6,613,000
Future annual maturities for 2019	6,832,000
Future annual maturities for 2020	$ 13,116,000
Semi annually fixed rate payable	3.26%
Other long-term debt	$ 42,181,000			45,155,000
Unsecured Revolving Credit Facility [Member] | Revolving Credit Facility One [Member]
Debt Disclosure [Line Items]
Debt Instrument, term	5 years
Line of credit facility, maximum borrowing capacity	$ 1,350,000,000
Line of credit facility, expiration dates	2018-10
Line of credit facility, borrowing and financial letter of credit sublimit	$ 675,000,000
Financial letters line of credit capacity	270,000,000
Maximum amount available for dividends and stock repurchase	250,000,000
Revolving facility and other short-term borrowings	300,000,000
Amount outstanding under credit facility	201,101,000
Available borrowing capacity under credit facility	848,899,000
Remaining borrowing capacity under credit facility	$ 375,000,000
Weighted average interest rate	1.80%
Unsecured Revolving Credit Facility [Member] | Revolving Credit Facility Two [Member]
Debt Disclosure [Line Items]
Debt Instrument, term	5 years
Line of credit facility, maximum borrowing capacity	$ 650,000,000
Line of credit facility, expiration dates	2018-02
Line of credit facility, borrowing and financial letter of credit sublimit	$ 487,500,000
Revolving facility and other short-term borrowings	59,000,000
Amount outstanding under credit facility	19,529,000
Available borrowing capacity under credit facility	571,471,000
Remaining borrowing capacity under credit facility	$ 424,509,000
Weighted average interest rate	3.80%
Financial letters of credit, outstanding amount	$ 3,991,000
Unsecured Revolving Credit Facility [Member] | Total Revolving Credit Facilities [Member]
Debt Disclosure [Line Items]
Maximum outstanding borrowings	1,144,240,000
Surety Bond [Member]
Debt Disclosure [Line Items]
Outstanding surety bonds	$ 689,226,000
Prime Rate [Member] | Unsecured Revolving Credit Facility [Member] | Revolving Credit Facility One [Member]
Debt Disclosure [Line Items]
Debt instrument, basis for variable rate	3.25%
Debt instrument, basis spread on variable rate	0.50%
Prime Rate [Member] | Unsecured Revolving Credit Facility [Member] | Revolving Credit Facility Two [Member]
Debt Disclosure [Line Items]
Debt instrument, basis for variable rate	3.25%
Debt instrument, basis spread on variable rate	0.50%
London Interbank Offered Rate (LIBOR) [Member] | Term Loan [Member]
Debt Disclosure [Line Items]
Debt instrument, basis for variable rate	0.19%
Debt instrument, basis spread on variable rate	1.50%
London Interbank Offered Rate (LIBOR) [Member] | Unsecured Revolving Credit Facility [Member] | Revolving Credit Facility One [Member]
Debt Disclosure [Line Items]
Debt instrument, basis for variable rate	0.19%
Debt instrument, basis spread on variable rate	1.50%
London Interbank Offered Rate (LIBOR) [Member] | Unsecured Revolving Credit Facility [Member] | Revolving Credit Facility Two [Member]
Debt Disclosure [Line Items]
Debt instrument, basis for variable rate	0.19%
Debt instrument, basis spread on variable rate	1.50%
Maximum [Member] | Unsecured Revolving Credit Facility [Member] | Revolving Credit Facility One [Member]
Debt Disclosure [Line Items]
Debt instrument, covenant leverage ratio	3.0
Debt instrument covenant leverage ratio for dividend payments and share repurchases	1.5
Minimum [Member] | Unsecured Revolving Credit Facility [Member] | Revolving Credit Facility One [Member]
Debt Disclosure [Line Items]
Debt instrument, covenant fixed charge coverage ratio	1.75
Subsequent Event [Member] | New Senior Notes [Member]
Debt Disclosure [Line Items]
Senior notes		$ 200,000,000
Semi annually fixed rate payable		4.53%
Subsequent Event [Member] | Term Loan [Member]
Debt Disclosure [Line Items]
Unsecured term loan			$ 500,000,000
Future annual maturities for 2016			56,250,000
Future annual maturities for 2017			75,000,000
Future annual maturities for 2018			75,000,000
Future annual maturities for 2019			293,750,000
Subsequent Event [Member] | Unsecured Revolving Credit Facility [Member] | Revolving Credit Facility Two [Member]
Debt Disclosure [Line Items]
Line of credit facility, maximum borrowing capacity			800,000,000
Financial letters line of credit capacity			50,000,000
Term Loan One [Member] | Term Loan [Member]
Debt Disclosure [Line Items]
Debt Instrument, term	4 years
Weighted average interest rate	2.00%
Unsecured term loan remaining	$ 775,000,000			825,000,000
Unsecured term loan	1,000,000,000			$ 1,000,000,000
Future annual maturities for the remainder of 2015	50,000,000
Long-term Debt, Maturities, Repayments of Principal in Next Twelve Months	150,000,000
Future annual maturities for 2016	575,000,000
Term Loan One [Member] | Term Loan [Member] | Interest Rate Swap [Member]
Debt Disclosure [Line Items]
Hedge against interest rate variability	$ 391,375,000
Term Loan One [Member] | Subsequent Event [Member]
Debt Disclosure [Line Items]
Prepayment of Principal for Long-term Debt Maturities in Year Two			$ 275,000,000