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Long-Term Debt (Narrative) (Details) | 1 Months Ended | 12 Months Ended |
--- | --- | --- | ---
Nov. 30, 2021 USD ($) | Dec. 31, 2023 USD ($) type_of_borrowing business_day lender | Dec. 31, 2022 USD ($)
Short-term Debt [Line Items] |  |  |
Total authorized program |  | $ 1,200,000,000 | $ 1,200,000,000
Number of lenders in syndicate | lender |  | 12 |
Number of types of borrowing that may be elected under the facility | type_of_borrowing |  | 5 |
Number of business days' notice to terminate facility | business_day |  | 3 |
Letter of Credit |  |  |
Short-term Debt [Line Items] |  |  |
Total authorized program |  | $ 125,000,000.0 |
Line of Credit |  |  |
Short-term Debt [Line Items] |  |  |
Excess of without planned expenditures |  | $ 750,000,000.0 |
Leverage ratio to EBITDA |  | 3.50 |
Secured debt limit, percentage of total consolidated assets |  | 15.00% |
Line of Credit | Debt Covenant 2 |  |  |
Short-term Debt [Line Items] |  |  |
Leverage ratio to EBITDA |  | 4.00 |
Term notes | Senior Notes, Due 2051 |  |  |
Short-term Debt [Line Items] |  |  |
Long-term debt | $ 500,000,000.0 |  |
Stated percentage (as a percent) | 3.50% |  |
Term notes | Senior Notes, Due 2022 |  |  |
Short-term Debt [Line Items] |  |  |
Stated percentage (as a percent) | 3.40% |  |
Repayments of debt | $ 300,000,000.0 |  |
Revolving credit facility |  |  |
Short-term Debt [Line Items] |  |  |
Total authorized program |  | $ 1,200,000,000 |
Credit facility outstanding |  | 0 | $ 0
Line of credit facility, current borrowing capacity |  | 331,900,000 |
Revolving credit facility | Line of Credit |  |  |
Short-term Debt [Line Items] |  |  |
Total authorized program |  | 1,200,000,000 |
Letter of Credit |  |  |
Short-term Debt [Line Items] |  |  |
Credit facility outstanding |  | $ 0 |

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- Definition The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(22)) -SubTopic 10 -Topic 210 -Publisher FASB -URI https://asc.fasb.org//1943274/2147480566/210-10-S99-1 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 944 -SubTopic 210 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(a)(16)(a)(2)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479440/944-210-S99-1 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 942 -SubTopic 210 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(16)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479853/942-210-S99-1 + Details
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