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Schedule I - Condensed Financial Information of Parent (Guarantees and Letters of Credit) (Details) $ in Millions | 12 Months Ended
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Dec. 31, 2022 USD ($) agreement
Condensed Financial Statements, Captions [Line Items] |
Obligations number of agreements | agreement | 140
Guarantor Obligations, Maximum Exposure, Undiscounted | $ 2,693
Guarantees [Member] | Parent Company |
Condensed Financial Statements, Captions [Line Items] |
Obligations number of agreements | agreement | 81
Guarantor Obligations, Maximum Exposure, Undiscounted | $ 2,400
Standby Letters of Credit [Member] | Minimum |
Condensed Financial Statements, Captions [Line Items] |
Line of Credit Facility, Unused Capacity, Commitment Fee Percentage | 1.00%
Standby Letters of Credit [Member] | Maximum |
Condensed Financial Statements, Captions [Line Items] |
Line of Credit Facility, Unused Capacity, Commitment Fee Percentage | 3.00%
Guarantee Obligations [Member] |
Condensed Financial Statements, Captions [Line Items] |
Obligations number of agreements | agreement | 81
Guarantor Obligations, Maximum Exposure, Undiscounted | $ 2,406
Guarantee Obligations [Member] | Minimum |
Condensed Financial Statements, Captions [Line Items] |
Loss Contingency, Estimate of Possible Loss | 1
Guarantee Obligations [Member] | Maximum |
Condensed Financial Statements, Captions [Line Items] |
Loss Contingency, Estimate of Possible Loss | $ 400
Unsecured Debt [Member] | Financial Standby Letter of Credit [Member] |
Condensed Financial Statements, Captions [Line Items] |
Obligations number of agreements | agreement | 39
Guarantor Obligations, Maximum Exposure, Undiscounted | $ 128
Unsecured Debt [Member] | Financial Standby Letter of Credit [Member] | Minimum |
Condensed Financial Statements, Captions [Line Items] |
Loss Contingency, Estimate of Possible Loss | 1
Unsecured Debt [Member] | Financial Standby Letter of Credit [Member] | Maximum |
Condensed Financial Statements, Captions [Line Items] |
Loss Contingency, Estimate of Possible Loss | $ 36
Secured Debt [Member] | Standby Letters of Credit [Member] |
Condensed Financial Statements, Captions [Line Items] |
Obligations number of agreements | agreement | 2
Guarantor Obligations, Maximum Exposure, Undiscounted | $ 123
Secured Debt [Member] | Financial Standby Letter of Credit [Member] |
Condensed Financial Statements, Captions [Line Items] |
Obligations number of agreements | agreement | 16
Guarantor Obligations, Maximum Exposure, Undiscounted | $ 34
Secured Debt [Member] | Financial Standby Letter of Credit [Member] | Minimum |
Condensed Financial Statements, Captions [Line Items] |
Loss Contingency, Estimate of Possible Loss | 1
Secured Debt [Member] | Financial Standby Letter of Credit [Member] | Maximum |
Condensed Financial Statements, Captions [Line Items] |
Loss Contingency, Estimate of Possible Loss | $ 15

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- References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 235 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 3 -Subparagraph (SX 210.12-04(a)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480678/235-10-S99-3 Reference 2: http://www.xbrl.org/2003/role/recommendedDisclosureRef -Topic 810 -SubTopic 10 -Name Accounting Standards Codification -Section 45 -Paragraph 11 -Publisher FASB -URI https://asc.fasb.org//1943274/2147481231/810-10-45-11 + Details
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