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Debt (Tables)
 3 Months Ended
Mar. 31, 2022
Debt Disclosure [Abstract]  
Long-term debt outstanding Long-term debt outstanding was as follows:
 
Weighted
Average
Interest
Rate at
March 31, 2022
March 31, 2022March 31, 2021December 31, 2021
 (In thousands)
Senior Notes due on dates ranging from October 22, 2022 to September 15, 2061
4.28 %$2,275,000 $1,950,000 $2,125,000 
Commercial paper supported by revolving credit agreements.90 %348,500 218,900 450,300 
Credit agreements due on June 7, 20243.25 %85,800 43,350 127,500 
Medium-Term Notes due on dates ranging from September 15, 2027 to March 16, 2029
7.32 %35,000 35,000 35,000 
Term Loan Agreement due on September 3, 20322.00 %7,700 8,400 7,700 
Other notes due on dates ranging from January 1, 2024 to January 1, 2061
.95 %2,445 3,282 2,564 
Less unamortized debt issuance costs6,605 5,655 6,090 
Less discount77 3 74 
Total long-term debt2,747,763 2,253,274 2,741,900 
Less current maturities147,953 1,552 148,053 
Net long-term debt$2,599,810 $2,251,722 $2,593,847 
Schedule of debt maturities Long-term debt maturities, which excludes unamortized debt issuance costs and discount, at March 31, 2022, were as follows:
Remainder of
2022
2023202420252026Thereafter
(In thousands)
Long-term debt maturities$147,953 $77,925 $495,104 $177,802 $140,802 $1,714,859