Long-Term Debt - Long-Term Debt (Detail) - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021
Debt Instrument [Line Items]
Total debt	$ 5,040.0	$ 5,100.9
Less: current maturities	(699.1)	(0.1)
Long-term debt	4,340.9	5,100.8
0.650% Senior Notes, Due 2023
Debt Instrument [Line Items]
Total debt	699.1	697.4
4.250% Senior Notes, Due 2024
Debt Instrument [Line Items]
Total debt	398.9	398.3
7% Debentures, Due 2025
Debt Instrument [Line Items]
Total debt	124.7	124.6
3.450% Senior Notes, Due 2027
Debt Instrument [Line Items]
Total debt	298.3	297.9
3.500% Senior Notes, Due 2027
Debt Instrument [Line Items]
Total debt	491.5	496.4
2.500% Senior Notes, Due 2030
Debt Instrument [Line Items]
Total debt	470.5	491.1
2.400% Senior Notes, Due 2031
Debt Instrument [Line Items]
Total debt	888.6	891.8
6.25% Senior Notes, Due 2037
Debt Instrument [Line Items]
Total debt	228.4	228.3
4.250% Senior Notes, Due 2047
Debt Instrument [Line Items]
Total debt	590.2	592.1
3.200% Senior Notes, Due 2051
Debt Instrument [Line Items]
Total debt	849.8	882.9
Other Notes
Debt Instrument [Line Items]
Total debt	$ 0.0	$ 0.1