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v3.23.1

Short-Term and Long-Term Debt (Narrative) (Details) $ in Millions | 12 Months Ended
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Dec. 31, 2022 USD ($)
Debt Instrument [Line Items] |
Non-operating indebtedness of subsidiaries to total capitalization, maximum | 7.50%
Five-year revolving credit facility [Member] |
Debt Instrument [Line Items] |
Maximum Issuance Of Line of Credit | $ 2,500
Minimum consolidated net worth | $ 10,000
Percentage of aggregate net proceeds of equity issuances | 50.00%
Debt to capital ratio (low end of range) | 0.35%
Debt to capital ratio (high end of range) | 1.00%
Delaware Trust Facility [Member] |
Debt Instrument [Line Items] |
Facility agreement term | 10 years
Pre-capitalized securities, sold by trust | $ 500
Facility fee rate | 1.691%
Stockholders' equity threshold triggering required facility exercise | $ 2,750
Potential Issuance In Exchange For US Treasury Securities [Member] | Senior Notes 2.330%, Due 2030 [Member] |
Debt Instrument [Line Items] |
Interest rate | 2.33%
Potential Issuance In Exchange For US Treasury Securities [Member] | Delaware Trust Facility [Member] | Senior Notes 2.330%, Due 2030 [Member] |
Debt Instrument [Line Items] |
Principal balance | $ 500
Interest rate | 2.33%

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