Long-Term Debt (Tables)

6 Months Ended

Jun. 30, 2026

Debt Disclosure [Abstract]

Outstanding Long-Term Debt

Our outstanding long-term debt is shown below:


						June 30,						December 31,
(in millions)						2026						2025
Uncollateralized Senior Notes:
5.68% notes, due June 2026						$	—					$	2.9
6.39% notes, due December 2026						100.0						100.0
6.44% notes, due December 2027						100.0						100.0
6.43% notes, due May 2028						1.4						2.1
4.88% notes, due August 2028						60.0						60.0
3.73% notes, due December 2028						6.0						6.0
6.45% notes, due December 2028						100.0						100.0
3.88% notes, due May 2029						15.0						20.0
5.20% notes, due November 2029						100.0						100.0
5.02% notes, due September 2030						50.0						50.0
6.62% notes, due December 2030						100.0						100.0
5.16% notes, due August 2031						90.0						90.0
3.25% notes, due April 2032						42.0						45.5
6.71% notes, due December 2033						100.0						100.0
2.98% notes, due December 2034						63.0						63.0
3.00% notes, due July 2035						50.0						50.0
2.96% notes, due August 2035						40.0						40.0
2.49% notes, due January 2037						50.0						50.0
5.43% notes, due March 2038						80.0						80.0
3.48% notes, due May 2038						50.0						50.0
3.58% notes, due November 2038						50.0						50.0
6.73% notes, due December 2038						50.0						50.0
3.98% notes, due August 2039						100.0						100.0
2.95% notes, due March 2042						50.0						50.0
Equipment security note
2.46% note, due September 2031						5.3						5.8
Less: debt issuance costs						(3.1)						(3.6)
Total long-term debt						1,449.6						1,461.7
Less: current maturities						(131.7)						(134.6)
Total long-term debt, net of current maturities						$	1,317.9					$	1,327.1