Debt Instrument, Covenant, Debt To Capitalization Ratio Not To Exceed

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- Definition

Debt Instrument, Maximum Borrowing Capacity

+ References

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- Definition

Notes Issued, Term

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No definition available.

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Percentage of original payment amount if the notes are required to be repurchased.

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- Definition

Percentage points added to the reference rate to compute the variable rate on the debt instrument.

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No definition available.

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- Definition

Face (par) amount of debt instrument at time of issuance.

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- Definition

Effective interest rate for the funds borrowed under the debt agreement considering interest compounding and original issue discount or premium.

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- Definition

Contractual interest rate for funds borrowed, under the debt agreement.

+ References

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- Definition

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.

+ References

No definition available.

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- Definition

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

+ References

No definition available.

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- Definition

Period remaining on line of credit facility before it terminates, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

No definition available.

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- Definition

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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- Definition

Amount, excluding unamortized premium (discount) and debt issuance cost, of long-term debt. Excludes lease obligation.

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- Definition

The fair value of notes issued in noncash investing and financing activities.

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- Definition

Indebtedness divided by net capital.

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No definition available.

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Financing (Narrative) (Details) - USD ($)			1 Months Ended		12 Months Ended
Financing (Narrative) (Details) - USD ($)	Aug. 11, 2022	Jul. 28, 2021	Dec. 31, 2013	Nov. 30, 2006	Dec. 31, 2022	Dec. 31, 2021	Jul. 27, 2021	Feb. 05, 2018
Debt Instrument [Line Items]
Long-term debt					$ 543,700,000	$ 842,400,000
Total indebtedness to capitalization					0.395
Notes Payable to Banks
Debt Instrument [Line Items]
Debt instrument, term					364 days	364 days
Commercial paper
Debt Instrument [Line Items]
Debt instrument, term		397 days
Debt instrument, maximum borrowing capacity		$ 650,000,000					$ 550,000,000
Line of Credit \| Notes Payable to Banks
Debt Instrument [Line Items]
Debt instrument, term	364 days
Debt instrument, maximum borrowing capacity	$ 400,000,000
Line of Credit \| Minimum \| London Interbank Offered Rate (LIBOR) \| Notes Payable to Banks
Debt Instrument [Line Items]
Debt instrument, basis spread on variable rate	0.25%
Line of Credit \| Minimum \| Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate \| Notes Payable to Banks
Debt Instrument [Line Items]
Debt instrument, basis spread on variable rate	1.25%
Line of Credit \| Maximum \| London Interbank Offered Rate (LIBOR) \| Notes Payable to Banks
Debt Instrument [Line Items]
Debt instrument, basis spread on variable rate	0.50%
Line of Credit \| Maximum \| Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate \| Notes Payable to Banks
Debt Instrument [Line Items]
Debt instrument, basis spread on variable rate	1.50%
Line of Credit \| Standby Letters of Credit
Debt Instrument [Line Items]
Maximum borrowing capacity					$ 66,800,000	$ 49,500,000
Line of Credit \| Revolving Credit Facility
Debt Instrument [Line Items]
Maximum borrowing capacity		$ 650,000,000					$ 550,000,000
Line of credit facility, expiration period		5 years
Long-term debt					$ 0	$ 0
Line of Credit \| Revolving Credit Facility \| Minimum
Debt Instrument [Line Items]
Debt instrument, covenant, debt to capitalization ratio not to exceed		0.65
Line of Credit \| Revolving Credit Facility \| Minimum \| London Interbank Offered Rate (LIBOR)
Debt Instrument [Line Items]
Debt instrument, basis spread on variable rate		0.00%
Line of Credit \| Revolving Credit Facility \| Minimum \| Index Debt Rating
Debt Instrument [Line Items]
Debt instrument, basis spread on variable rate		0.805%
Line of Credit \| Revolving Credit Facility \| Maximum
Debt Instrument [Line Items]
Debt instrument, covenant, debt to capitalization ratio not to exceed		1.00
Line of Credit \| Revolving Credit Facility \| Maximum \| London Interbank Offered Rate (LIBOR)
Debt Instrument [Line Items]
Debt instrument, basis spread on variable rate		0.50%
Line of Credit \| Revolving Credit Facility \| Maximum \| Index Debt Rating
Debt Instrument [Line Items]
Debt instrument, basis spread on variable rate		1.50%
6.55% notes due November 2036
Debt Instrument [Line Items]
Percentage of notes issued repurchased				101.00%
Annualized interest rate including debt issuance cost amortization					6.67%
Debt Instrument, Interest Rate, Stated Percentage				6.55%	6.55%	6.55%
Long-term debt					$ 198,600,000	$ 198,500,000
Notes issued, term				30 years
Notes issued				$ 200,000,000
4.20% notes due March 2048
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage					4.20%	4.20%
Long-term debt					$ 346,500,000	$ 346,300,000
4.20% notes due March 2048 \| Senior Notes
Debt Instrument [Line Items]
Percentage of notes issued repurchased					101.00%
Annualized interest rate including debt issuance cost amortization					4.29%
Debt instrument, face amounts								$ 350,000,000
Debt Instrument, Interest Rate, Stated Percentage								4.20%
Letter of Credit Reimbursement Agreement \| Line of Credit \| Letter of Credit
Debt Instrument [Line Items]
Maximum borrowing capacity					$ 170,300,000	$ 162,700,000
4.45% notes due December 2023
Debt Instrument [Line Items]
Percentage of notes issued repurchased			101.00%
Annualized interest rate including debt issuance cost amortization					4.56%
Debt Instrument, Interest Rate, Stated Percentage			4.45%		4.45%	4.45%
Long-term debt					$ 0	$ 299,400,000
Notes issued, term			10 years
Notes issued			$ 300,000,000