Long-Term Debt (Tables)

12 Months Ended

Dec. 31, 2023

Debt Disclosure [Abstract]

Long-Term Debt

December 31  (in millions)	2023			2022
0.650% Senior Notes, due 2023 (discharged)	$	—		$	699.1
4.250% Senior Notes, due 2024		399.6			398.9
7% Debentures, due 2025		124.8			124.7
3.450% Senior Notes, due 2027		298.7			298.3
3.500% Senior Notes, due 2027		492.2			491.5
2.500% Senior Notes, due 2030		471.5			470.5
2.400% Senior Notes, due 2031		889.4			888.6
6.25% Senior Notes, due 2037		228.4			228.4
4.250% Senior Notes, due 2047		590.4			590.2
3.200% Senior Notes, due 2051		850.2			849.8
Total debt		4,345.2			5,040.0
Less: current maturities		(399.6	)		(699.1	)
Long-term debt	$	3,945.6		$	4,340.9

Schedule of Principal Amount, Effective Interest Rate and Maturity Date for Corporation's Senior Notes

	Principal Amount (in millions)		Effective Interest Rate	Maturity Date
4.250% Senior Notes	$	400.0	4.40%	July 2, 2024
7% Debentures	$	125.0	7.05%	December 1, 2025
3.450% Senior Notes	$	300.0	3.55%	June 1, 2027
3.500% Senior Notes	$	494.6	3.61%	December 15, 2027
2.500% Senior Notes	$	478.0	2.71%	March 15, 2030
2.400% Senior Notes	$	895.9	2.48%	July 15, 2031
6.25% Senior Notes	$	230.0	6.32%	May 1, 2037
4.250% Senior Notes	$	597.9	4.32%	December 15, 2047
3.200% Senior Notes	$	865.9	3.29%	July 15, 2051

Schedule of Corporation's Long-Term Debt Maturities

The Company’s long-term debt maturities for each of the next five years and thereafter are as follows:

(in millions)
2024	$	399.6
2025		124.8
2026		—
2027		790.9
2028		—
Thereafter		3,029.9
Total	$	4,345.2