Long-Term Debt (Tables)

3 Months Ended

Mar. 31, 2023

Debt Disclosure [Abstract]

Long-Term Debt

	March 31,			December 31,
	2023			2022
	(Dollars in Millions)
0.650% Senior Notes, due 2023 (discharged)	$	699.6		$	699.1
4.250% Senior Notes, due 2024		399.1			398.9
7% Debentures, due 2025		124.7			124.7
3.450% Senior Notes, due 2027		298.4			298.3
3.500% Senior Notes, due 2027		491.7			491.5
2.500% Senior Notes, due 2030		470.8			470.5
2.400% Senior Notes, due 2031		888.8			888.6
6.25% Senior Notes, due 2037		228.4			228.4
4.250% Senior Notes, due 2047		590.2			590.2
3.200% Senior Notes, due 2051		849.9			849.8
Total debt		5,041.6			5,040.0
Less: current maturities		(699.6	)		(699.1	)
Long-term debt	$	4,342.0		$	4,340.9