Long-Term Debt (Tables)

12 Months Ended

Dec. 31, 2021

Debt Disclosure [Abstract]

Long-Term Debt

December 31 (in millions)	2021			2020
0.650% Senior Notes, due 2023	$	697.4		$	—
4.25% Senior Notes, due 2024		398.3			397.6
7% Debentures, due 2025		124.6			124.5
3.450% Senior Notes, due 2027		297.9			297.6
3.500% Senior Notes, due 2027		496.4			495.8
2.500% Senior Notes, due 2030		491.1			490.1
2.400% Senior Notes, due 2031		891.8			—
6.25% Senior Notes, due 2037		228.3			228.2
4.250% Senior Notes, due 2047		592.1			591.9
3.200% Senior Notes, due 2051		882.9			—
Other notes		0.1			0.1
Total debt		5,100.9			2,625.8
Less: current maturities		(0.1	)		—
Long-term debt	$	5,100.8		$	2,625.8

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

	Principal Amount (in millions)		Effective Interest Rate	Maturity Date
0.650% Senior Notes	$	700.0	0.78%	July 15, 2023
4.25% 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	$	500.0	3.60%	December 15, 2027
2.500% Senior Notes	$	500.0	2.71%	March 15, 2030
2.400% Senior Notes	$	900.0	2.48%	July 15, 2031
6.25% Senior Notes	$	230.0	6.32%	May 1, 2037
4.250% Senior Notes	$	600.0	4.32%	December 15, 2047
3.200% Senior Notes	$	900.0	3.29%	July 15, 2051

Schedule of Corporation's Long-Term Debt Maturities

The Company’s long-term debt maturities for the five years following December 31, 2021, and thereafter are:  

(in millions)
2022	$	0.1
2023		697.4
2024		398.2
2025		124.6
2026		—
Thereafter		3,880.6
Total	$	5,100.9