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Long-Term Debt And Commercial Paper (Narrative) (Details) - USD ($) | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2023 | Dec. 31, 2022
Debt Instrument [Line Items] |  |
Letters of credit, amount outstanding | $ 700,000 |
Commercial paper, maximum aggregate amount outstanding permitted | 1,000,000,000 |
Commercial paper, amount outstanding | $ 285,000,000 | $ 50,000,000
Commercial Paper |  |
Debt Instrument [Line Items] |  |
Weighted-average annual interest rate | 5.55% | 4.30%
Maximum | Commercial Paper |  |
Debt Instrument [Line Items] |  |
Maturity period of debt | 397 days |
Weighted Average | Commercial Paper |  |
Debt Instrument [Line Items] |  |
Maturity period of debt | 3 days | 1 day
Revolving credit facility |  |
Debt Instrument [Line Items] |  |
Maximum borrowing capacity under revolving credit facility | $ 1,800,000,000 |
Additional borrowing capacity under accordion feature of revolving credit facility | 500,000,000 |
Revolving credit facilities letter of credit sublimit | 200,000,000 |
Additional borrowing capacity under the revolving credit facility | $ 1,800,000,000 |
Revolving credit facility | Minimum |  |
Debt Instrument [Line Items] |  |
Commitment fee on undrawn amounts (percent) | 0.125% |
Revolving credit facility | Maximum |  |
Debt Instrument [Line Items] |  |
Commitment fee on undrawn amounts (percent) | 0.20% |
Line of Credit | Revolving credit facility | Secured Overnight Financing Rate (SOFR) |  |
Debt Instrument [Line Items] |  |
Credit spread adjustment on SOFR borrowings under our revolving credit facility | 0.10% |
Line of Credit | Revolving credit facility | Minimum | Secured Overnight Financing Rate (SOFR) |  |
Debt Instrument [Line Items] |  |
Basis spread on variable interest rates (percent) | 1.125% |
Line of Credit | Revolving credit facility | Minimum | Base Rate |  |
Debt Instrument [Line Items] |  |
Basis spread on variable interest rates (percent) | 0.125% |
Line of Credit | Revolving credit facility | Maximum | Secured Overnight Financing Rate (SOFR) |  |
Debt Instrument [Line Items] |  |
Basis spread on variable interest rates (percent) | 1.50% |
Line of Credit | Revolving credit facility | Maximum | Base Rate |  |
Debt Instrument [Line Items] |  |
Basis spread on variable interest rates (percent) | 0.50% |

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- Definition Maximum amount of increase in the revolving credit facility allowed under the accordion feature of the credit agreement, subject to credit availability and certain other conditions. + References No definition available. + Details
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- Definition The maximum amount of letters of credit that can be issued under the terms of the revolving credit facilities. + References No definition available. + Details
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- Definition Carrying value as of the balance sheet date of short-term borrowings using unsecured obligations issued by banks, corporations and other borrowers to investors. The maturities of these money market securities generally do not exceed 270 days. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(13)(2)) -URI https://asc.fasb.org/extlink&oid=126897435&loc=d3e534808-122878 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(a)(16)) -URI https://asc.fasb.org/extlink&oid=126734703&loc=d3e572229-122910 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(19)(a)(3)) -URI https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
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