Long-Term Debt (Interest Rates And Due Dates) (Details) - USD ($)	12 Months Ended
Dec. 31, 2022	Dec. 31, 2021
Debt Instrument [Line Items]
Finance leases	$ 4,200,000	$ 3,700,000
Unamortized discounts and deferred loan costs	(15,600,000)	(17,700,000)
Total debt	2,083,600,000	2,090,300,000
Less: current maturities	9,400,000	300,600,000
Total long-term debt	$ 2,074,200,000	1,789,700,000
Long-term debt, term	180 days
Maximum borrowing capacity	$ 1,200,000,000	1,200,000,000
Revolving credit facility
Debt Instrument [Line Items]
Maximum borrowing capacity		$ 1,200,000,000
Senior Notes
Debt Instrument [Line Items]
Redemption price, percent	100.00%
Long-term debt, term	90 days
Redemption price, if change of control repurchase event occurs, percent	101.00%
Limitation on secured debt, percent	15.00%
Industrial development bonds, principally variable interest rates
Debt Instrument [Line Items]
Year-end Interest Rate	3.90%	0.30%
Short term and long term debt	$ 3,800,000	$ 3,800,000
Commercial paper
Debt Instrument [Line Items]
Year-end Interest Rate	4.80%	0.00%
Short term and long term debt	$ 282,500,000	$ 0
Other, partially secured
Debt Instrument [Line Items]
Short term and long term debt	$ 8,700,000	$ 500,000
Net commercial paper
Debt Instrument [Line Items]
Weighted average interest rate	3.20%	0.20%
Line of Credit \| Revolving credit facility
Debt Instrument [Line Items]
Maximum borrowing capacity	$ 1,200,000,000
Senior Notes, Due 2022 \| Senior Notes
Debt Instrument [Line Items]
Year-end Interest Rate		3.40%
Short term and long term debt	$ 0	$ 300,000,000.0
Senior Notes, Due 2024 \| Senior Notes
Debt Instrument [Line Items]
Year-end Interest Rate	3.80%	3.80%
Short term and long term debt	$ 300,000,000.0	$ 300,000,000.0
Senior Notes, Due 2027 \| Senior Notes
Debt Instrument [Line Items]
Year-end Interest Rate	3.50%	3.50%
Short term and long term debt	$ 500,000,000.0	$ 500,000,000.0
Senior Notes, Due 2029 \| Senior Notes
Debt Instrument [Line Items]
Year-end Interest Rate	4.40%	4.40%
Short term and long term debt	$ 500,000,000.0	$ 500,000,000.0
Senior Notes, Due 2051 \| Senior Notes
Debt Instrument [Line Items]
Year-end Interest Rate	3.50%	3.50%
Short term and long term debt	$ 500,000,000.0	$ 500,000,000.0

Debt Instrument, Redemption Price, if Change of Control Repurchase Event Occurs, Percentage

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Limitation on Secured Debt, Percent of Consolidated Assets

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Amount of short-term and long-term debt and lease obligation.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Percentage price of original principal amount of debt at which debt can be redeemed by the issuer.

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Amount of unamortized debt discount (premium) and debt issuance costs.

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Represents the aggregate of total long-term debt, including current maturities and short-term debt.

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Weighted average interest rate of debt outstanding.

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Present value of lessee's discounted obligation for lease payments from finance lease.

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Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

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Amount of long-term debt and lease obligation, classified as noncurrent.

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Amount of long-term debt and lease obligation, classified as current.

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Period between issuance and maturity of long-term debt, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

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Weighted average interest rate of long-term debt outstanding calculated at point in time.

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