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

No definition available.

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- Definition

Debt Instrument, Maximum Borrowing Capacity

+ References

No definition available.

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- Definition

Notes Issued, Term

+ References

No definition available.

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- Definition

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, after unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

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- Definition

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

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- Definition

The cash inflow from a borrowing having initial term of repayment within one year or the normal operating cycle, if longer.

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- Definition

Indebtedness divided by net capital.

+ References

No definition available.

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- Definition

Reflects the total carrying amount as of the balance sheet date of debt having initial terms less than one year or the normal operating cycle, if longer.

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Financing (Narrative) (Details)			1 Months Ended				12 Months Ended
Financing (Narrative) (Details)	Jul. 28, 2021 USD ($)	Apr. 16, 2020 USD ($)	Jan. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)	Dec. 31, 2013 USD ($)	Nov. 30, 2006 USD ($)	Dec. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)	Jul. 27, 2021 USD ($)	Apr. 16, 2020 EUR (€)	Feb. 05, 2018 USD ($)	Dec. 31, 2014
Debt Instrument [Line Items]
Short-term borrowings							$ 0	$ 375,700,000
Long-term debt							$ 842,400,000	842,900,000
Total indebtedness to capitalization							0.315
Commercial paper
Debt Instrument [Line Items]
Debt instrument, maximum borrowing capacity	$ 650,000,000								$ 550,000,000
Debt instrument, term	397 days
Short-term borrowings							$ 0	$ 27,200,000
Proceeds from short-term debt			$ 100,000,000	$ 150,000,000
Notes Payable to Banks
Debt Instrument [Line Items]
Debt instrument, term		364 days					364 days	364 days
Line of Credit \| Standby Letters of Credit
Debt Instrument [Line Items]
Maximum borrowing capacity							$ 49,500,000	$ 57,900,000
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]
Notes issued, term						30 years
Notes issued						$ 200,000,000
Debt Instrument, Interest Rate, Stated Percentage						6.55%	6.55%	6.55%
Percentage of notes issued repurchased						101.00%
Annualized interest rate including debt issuance cost amortization							6.67%
Long-term debt							$ 198,500,000	$ 198,400,000
4.20% notes due March 2048
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage							4.20%	4.20%
Long-term debt							$ 346,300,000	$ 346,200,000
4.20% notes due March 2048 \| Senior Notes
Debt Instrument [Line Items]
Debt instrument, face amounts											$ 350,000,000
Debt Instrument, Interest Rate, Stated Percentage											4.20%
Percentage of notes issued repurchased							101.00%
Annualized interest rate including debt issuance cost amortization							4.29%
Letter of Credit Reimbursement Agreement \| Line of Credit \| Letter of Credit
Debt Instrument [Line Items]
Maximum borrowing capacity							$ 162,700,000	183,400,000
364-Day Credit Agreement \| Line of Credit
Debt Instrument [Line Items]
Short-term borrowings							$ 0	$ 348,500,000
Debt instrument, face amounts		$ 300,000,000								€ 40,000,000
4.45% notes due December 2023
Debt Instrument [Line Items]
Notes issued, term					10 years
Notes issued					$ 300,000,000
Debt Instrument, Interest Rate, Stated Percentage							4.45%	4.45%				4.45%
Percentage of notes issued repurchased					101.00%
Annualized interest rate including debt issuance cost amortization							4.56%
Long-term debt							$ 299,400,000	$ 299,100,000