Long-term Debt (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021	Dec. 31, 2021
Debt Instrument [Line Items]
Long-term Debt, Gross	$ 2,903.1		$ 2,903.1		$ 2,909.3
Long-term Debt, Fair Value	2,485.7		2,485.7		3,337.4
Long-term Debt, Current Maturities	0.6		0.6		0.7
Long-term Debt, Excluding Current Maturities	2,902.5		2,902.5		2,908.6
Loss on Extinguishment of Debt	0.0	$ 0.0	0.0	$ (74.0)
4.000% Notes Due 2022
Debt Instrument [Line Items]
Par Value	$ 250.0		$ 250.0
Interest Rate Stated Percentage	4.00%		4.00%
3.750% Notes Due 2023
Debt Instrument [Line Items]
Par Value	$ 500.0		$ 500.0
Interest Rate Stated Percentage	3.75%		3.75%
4.200% Notes Due 2024 (less unamortized discount and issuance costs of $0.1 and $0.4, respectively)
Debt Instrument [Line Items]
Par Value	$ 500.0		$ 500.0
Effective Interest Rate	4.24%		4.24%
Long-term Debt, Gross					249.4
4.650% Notes Due 2028 (less unamortized discount and issuance costs of $1.2 and $2.9, respectively)
Debt Instrument [Line Items]
Par Value	$ 500.0		$ 500.0
Maturity Date			Oct. 01, 2028
Interest Rate Stated Percentage	4.65%		4.65%
Effective Interest Rate	4.78%		4.78%
Unamortized Discount	$ 1.1		$ 1.1
Issuance Cost	2.7		2.7
Long-term Debt, Gross	496.2		496.2		495.8
4.750% Notes Due 2030 (less unamortized discount and issuance costs of $3.2 and $4.9, respectively)
Debt Instrument [Line Items]
Par Value	$ 650.0		$ 650.0
Maturity Date			Mar. 30, 2030
Interest Rate Stated Percentage	4.75%		4.75%
Effective Interest Rate	4.92%		4.92%
Unamortized Discount	$ 3.0		$ 3.0
Issuance Cost	4.6		4.6
Long-term Debt, Gross	642.4		642.4		641.7
2.400% Notes Due 2031 (less unamortized discount and issuance costs of $0.7 and $4.2, respectively)
Debt Instrument [Line Items]
Par Value	$ 500.0		$ 500.0
Maturity Date			Mar. 01, 2031
Effective Interest Rate	2.512%		2.512%
Unamortized Discount	$ 0.7		$ 0.7
Issuance Cost	3.9		3.9
Long-term Debt, Gross	$ 495.4		$ 495.4		495.0
3.375% Notes Due 2041 (less unamortized discount and issuance costs of $1.0 and $5.5, respectively)
Debt Instrument [Line Items]
Maturity Date			Mar. 01, 2041
Effective Interest Rate	3.448%		3.448%
Unamortized Discount	$ 1.0		$ 1.0
Issuance Cost	5.3		5.3
Long-term Debt, Gross	493.7		493.7		493.4
5.400% Notes Due 2048 (less unamortized discount and issuance costs of $2.7 and $4.9, respectively)
Debt Instrument [Line Items]
Par Value	$ 500.0		$ 500.0
Maturity Date			Oct. 01, 2048
Interest Rate Stated Percentage	5.40%		5.40%
Effective Interest Rate	5.48%		5.48%
Unamortized Discount	$ 2.6		$ 2.6
Issuance Cost	4.9		4.9
Long-term Debt, Gross	492.5		492.5		492.3
Other notes payable and capitalized leases
Debt Instrument [Line Items]
Long-term Debt, Gross	$ 33.3		$ 33.3		$ 41.7
Unsecured Debt 2.400% Note [Member]
Debt Instrument [Line Items]
Interest Rate Stated Percentage	2.40%		2.40%
Unsecured Debt 3.375% Note
Debt Instrument [Line Items]
Par Value	$ 500.0		$ 500.0
Interest Rate Stated Percentage	3.375%		3.375%
Unsecured Debt 4.200% Notes Remaining Principal
Debt Instrument [Line Items]
Par Value	$ 250.0		$ 250.0
Maturity Date			Apr. 15, 2024
Interest Rate Stated Percentage	4.20%		4.20%
Unamortized Discount	$ 0.1		$ 0.1
Issuance Cost	0.3		0.3
Long-term Debt, Gross	$ 249.6		$ 249.6