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Debt and Other Financing Arrangements - Schedule of Debt and Other Financing Arrangements (Detail) - USD ($)
$ in Thousands
Dec. 31, 2021
Dec. 31, 2020
May 31, 2020
Debt Instrument [Line Items]      
Finance lease obligations $ 179,053 $ 90,338  
Total long-term debt and finance lease obligations 5,779,278 5,493,573  
Less premium on debt exchange 174,891 180,045  
Less debt issuance costs 27,299 30,854 $ 8,400
Total amounts outstanding 5,577,088 5,282,674  
Less current maturities of long-term debt 601,000    
Less current portion of finance lease obligations 14,678 10,885  
Total long-term debt and finance lease obligations due after one year 4,961,410 5,271,789  
Notes, 4.125%, due 2022 [Member]      
Debt Instrument [Line Items]      
Debt instrument face amount 600,000 600,000  
Notes, 4.000%, due 2023 [Member]      
Debt Instrument [Line Items]      
Debt instrument face amount 500,000 500,000  
Notes, 2.000%, due 2025 [Member]      
Debt Instrument [Line Items]      
Debt instrument face amount 500,000 500,000  
Notes, 3.950%, due 2028 [Member]      
Debt Instrument [Line Items]      
Debt instrument face amount 500,000 500,000  
Notes, 2.700%, due 2030 [Member]      
Debt Instrument [Line Items]      
Debt instrument face amount 500,000 500,000  
Notes, 6.400%, due 2037 [Member]      
Debt Instrument [Line Items]      
Debt instrument face amount 543,331 543,331  
Notes, 5.200%, due 2043 [Member]      
Debt Instrument [Line Items]      
Debt instrument face amount 338,133 338,133  
Notes, 4.400%, due 2048 [Member]      
Debt Instrument [Line Items]      
Debt instrument face amount 329,219 329,219  
Notes, 2.979%, due 2055 [Member]      
Debt Instrument [Line Items]      
Debt instrument face amount 439,312 439,312  
Industrial Revenue Bonds [Member] | Due from 2022 to 2061 [Member]      
Debt Instrument [Line Items]      
Debt instrument face amount $ 1,350,230 $ 1,153,240