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Derivative Financial Instruments and Hedging Activities Derivative Financial Instruments and Hedging Activities (Schedule of Fair Value Hedging Basis Adjustments) (Details) - Designated as Hedging Instrument [Member] - USD ($) $ in Millions | Mar. 31, 2023 | Dec. 31, 2022
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Debt Available-for-Sale Securities [Member] |  |
Derivative Instruments and Hedging Activities Disclosures [Line Items] |  |
Hedged Asset, Fair Value Hedge | $ 24 | $ 23
Hedged Asset, Fair Value Hedge, Cumulative Increase (Decrease) | 0 | 0
Long-term Debt [Member] |  |
Derivative Instruments and Hedging Activities Disclosures [Line Items] |  |
Hedged Liability, Fair Value Hedge | (1,263) | (1,239)
Hedged Liability, Fair Value Hedge, Cumulative Increase (Decrease) | $ 135 | $ 158

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- Definition Amount of asset hedged in fair value hedging relationship. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4EE -Subparagraph (a) -URI https://asc.fasb.org/extlink&oid=125515794&loc=SL109999712-113959 + Details
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