Summary of Long-Term Debt (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Sep. 21, 2012	Dec. 31, 2011
Debt Instrument [Line Items]
Line of credit facility amount outstanding		$ 3,430,000
Accounts receivable securitization program	249,000
Long-term debt	3,730,020		3,653,907
Less-Amounts due within one year	(2,589)		(2,479)
Long-term debt, net	3,727,431		3,651,428
Notes Payable And Mortgages Payable
Debt Instrument [Line Items]
Notes payable and Mortgages payable (including obligations under capitalized leases of $8,267 in 2012 and 9,982 in 2011) and term loans with varying maturities through 2038; weighted average interest at 5.9% in 2012 and 6.1% in 2011 (see Note 7 regarding capitalized leases)	47,216		51,841
Revolving Credit And Demand Notes
Debt Instrument [Line Items]
Line of credit facility amount outstanding	163,500		249,600
Term Loan A
Debt Instrument [Line Items]
Line of credit facility amount outstanding	983,438	988,000	1,017,647
Less-Amounts due within one year	(72,000)
Term Loan B Facility
Debt Instrument [Line Items]
Line of credit facility amount outstanding	737,176	746,000	1,439,500
Term Loan- A2
Debt Instrument [Line Items]
Line of credit facility amount outstanding	894,375	900,000
Less-Amounts due within one year	(72,000)
Revenue Bonds
Debt Instrument [Line Items]
Revenue bonds, interest at floating rates of 0.2% at December 31, 2012 and 2011, with varying maturities through 2015	5,300		5,300
Accounts Receivable Securitization Program
Debt Instrument [Line Items]
Accounts receivable securitization program	249,000		240,000
7.125% Senior Secured Notes due 2016
Debt Instrument [Line Items]
Senior Notes	400,015		400,019
7.00% Senior Unsecured Notes due 2018
Debt Instrument [Line Items]
Senior Notes	$ 250,000		$ 250,000