Long-Term Debt - Additional Information (Detail) - USD ($)			12 Months Ended
	Aug. 07, 2014	Jul. 31, 2014	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Aug. 01, 2014	Oct. 31, 2013	Jun. 30, 2008	Jun. 30, 2006
Debt Instrument [Line Items]
Reduction of long-term debt			$ 68,166,000	$ 879,129,000	$ 440,224,000
Costs related to extinguishment of debt			$ 0	$ 36,171,000	$ 0
Rate adjustment to weighted average federal funds rate for credit facility borrowings				0.50%
Rate adjustment to one month Eurodollar rate on credit facility borrowings				1.00%
Effective interest rate			2.40%	3.10%	3.60%
Long-term debt			$ 3,387,303,000	$ 3,210,215,000
Fair value of debt			3,500,000,000	3,300,000,000
Accounts Receivable Securitization Facility
Debt Instrument [Line Items]
Accounts receivable securitization program, additional capacity			$ 0
3.750% Senior Secured Notes due 2019
Debt Instrument [Line Items]
Senior notes, interest rate			3.75%
Unamortized discount			$ 155,000	198,000
4.750% Senior Secured Notes due 2022
Debt Instrument [Line Items]
Senior notes, interest rate			4.75%
Unamortized discount			$ 177,000	204,000
7.00% Senior Unsecured Notes
Debt Instrument [Line Items]
Reduction of long-term debt		$ 250,000,000		$ 250,000,000
Senior notes, interest rate		7.00%		7.00%
Debt instrument redemption, date			Jul. 31, 2014
Unsecured notes make-whole redemption price		104.56%
Write-off deferred charges, original issue discount and make-whole premiums paid		$ 11,000,000		$ 11,000,000
Unamortized discount				5,000,000
Write-off deferred charges				20,000,000
Senior notes, maturity date			Oct. 01, 2018
Accounts Receivable Securitization Program
Debt Instrument [Line Items]
Accounts receivable securitization program			$ 400,000,000
Senior Notes 7.125%
Debt Instrument [Line Items]
Senior notes, issued									$ 250,000,000
Senior notes, interest rate									7.125%
Senior notes, maturity date			Jun. 30, 2016
Senior notes, repayment terms			Interest on the 7.125% Notes is payable semiannually in arrears on June 30th and December 30th of each year.
Line of credit facility additional borrowing capacity								$ 150,000,000
Credit Agreement And Securitization
Debt Instrument [Line Items]
Average amounts outstanding under Credit Agreement, Prior Credit Agreement, demand notes and accounts receivable securitization programs			$ 2,100,000,000	$ 2,400,000,000	$ 2,900,000,000
Effective interest rate			1.70%	1.80%	2.20%
Maximum amounts outstanding at any month-end			$ 2,300,000,000	$ 2,700,000,000	$ 3,000,000,000
Amendment of Credit Facility
Debt Instrument [Line Items]
Line of credit facility, starting date	Aug. 07, 2014		Aug. 07, 2014
Line of credit facility, maturity month	2019-08		2019-08
Accounts receivable securitization program credit facility, borrowing capacity			$ 400,000,000			$ 360,000,000	$ 275,000,000
Amendment of Credit Facility | Accounts Receivable Securitization Facility
Debt Instrument [Line Items]
Line of credit facility, starting date			Aug. 01, 2014
Line of credit facility, extended maturity date			Dec. 21, 2018
Line of credit facility, starting Period			2015-12
Revolving Credit Facility
Debt Instrument [Line Items]
Line of credit facility, borrowing capacity	$ 800,000,000		$ 800,000,000
Line of credit facility amount outstanding			$ 300,000,000
Current applicable margins			1.50%
Line of credit facility, available borrowing capacity			$ 461,000,000
Letters of credit, outstanding			34,000,000
Revolving Credit Facility | Short Term on Demand Credit Facility
Debt Instrument [Line Items]
Line of credit facility amount outstanding			5,000,000
Revolving Credit Facility | Letter of Credit
Debt Instrument [Line Items]
Line of credit facility, borrowing capacity			$ 125,000,000
Revolving Credit Facility | ABR-based loans
Debt Instrument [Line Items]
Current applicable margins			0.50%
Revolving Credit Facility | Minimum | One Month Eurodollar Rate Plus Index Based Loans
Debt Instrument [Line Items]
Consolidated Leverage Ratio			0.50%
Revolving Credit Facility | Minimum | One Two Three Six Month Eurodollar Rate Plus Index Based Loans
Debt Instrument [Line Items]
Consolidated Leverage Ratio			1.50%
Revolving Credit Facility | Maximum | One Month Eurodollar Rate Plus Index Based Loans
Debt Instrument [Line Items]
Consolidated Leverage Ratio			1.25%
Revolving Credit Facility | Maximum | One Two Three Six Month Eurodollar Rate Plus Index Based Loans
Debt Instrument [Line Items]
Consolidated Leverage Ratio			2.25%
Term Loan A
Debt Instrument [Line Items]
Line of credit facility amount outstanding			$ 1,717,940,000	1,761,872,000
Unamortized discount			$ 1,593,000	2,035,000
Current applicable margins			1.50%
Term Loan A | ABR-based loans
Debt Instrument [Line Items]
Current applicable margins			0.50%
Term Loan A | Minimum | One Month Eurodollar Rate Plus Index Based Loans
Debt Instrument [Line Items]
Consolidated Leverage Ratio			0.50%
Term Loan A | Minimum | One Two Three Six Month Eurodollar Rate Plus Index Based Loans
Debt Instrument [Line Items]
Consolidated Leverage Ratio			1.50%
Term Loan A | Maximum | One Month Eurodollar Rate Plus Index Based Loans
Debt Instrument [Line Items]
Consolidated Leverage Ratio			1.25%
Term Loan A | Maximum | One Two Three Six Month Eurodollar Rate Plus Index Based Loans
Debt Instrument [Line Items]
Consolidated Leverage Ratio			2.25%
Term Loan A | Quarterly installment payments commence in the fourth quarter of 2014 through September, 2016
Debt Instrument [Line Items]
Scheduled principal payments made				11,000,000
Term Loan A | Quarterly installment payments after September, 2016
Debt Instrument [Line Items]
Scheduled principal payments made				$ 22,000,000
Term Loan A | Amendment of Credit Facility
Debt Instrument [Line Items]
Line of credit facility, borrowing capacity	1,775,000,000
Line of credit facility amount outstanding			$ 1,720,000,000
Term Loan B Facility
Debt Instrument [Line Items]
Reduction of long-term debt			$ 550,000,000
Line of credit facility, maturity year			2016
New Senior Secured Notes | 3.750% Senior Secured Notes due 2019
Debt Instrument [Line Items]
Senior notes, issued	$ 300,000,000
Senior notes, interest rate	3.75%
Senior notes, maturity date			Aug. 01, 2019
Senior notes, interest payment, commencement date			Feb. 01, 2015
New Senior Secured Notes | 4.750% Senior Secured Notes due 2022
Debt Instrument [Line Items]
Senior notes, issued	$ 300,000,000
Senior notes, interest rate	4.75%
Senior notes, maturity date			Aug. 01, 2022