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Derivative Financial Instruments and Hedging Activities (Schedule of Fair Value Hedging Basis Adjustments) (Details) - USD ($) $ in Millions | Jun. 30, 2022 | Dec. 31, 2021
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Derivative Instruments and Hedging Activities Disclosures [Line Items] |  |
Hedged Asset, Fair Value, Portfolio Layer, Amount | $ 5,800 | $ 5,800
Closed Portfolio and Beneficial Interest, Portfolio Layer, Amortized Cost | 8,300 | 9,100
Designated as Hedging Item [Member] | Debt Available-for-sale Securities [Member] |  |
Derivative Instruments and Hedging Activities Disclosures [Line Items] |  |
Hedged Asset, Fair Value Hedge | 9,076 | 9,901
Hedged Asset, Fair Value Hedge, Cumulative Increase (Decrease) | (36) | 0
Designated as Hedging Item [Member] | Long-term Debt [Member] |  |
Derivative Instruments and Hedging Activities Disclosures [Line Items] |  |
Hedged Liability, Fair Value Hedge | (1,275) | (1,363)
Hedged Liability, Fair Value Hedge, Cumulative Increase (Decrease) | $ 122 | $ 34

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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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- Definition Amount of cumulative increase (decrease) in fair value of hedged asset in fair value hedge, attributable to hedged risk. + 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 (b) -URI https://asc.fasb.org/extlink&oid=125515794&loc=SL109999712-113959 + Details
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