Contingencies and Commitments (Details) $ in Millions	Jun. 30, 2026 USD ($) agreement
Schedule Of Contingent Contractual Obligations [Line Items]
Guarantor Obligations, Maximum Exposure, Undiscounted	$ 4,710
Number of Agreements \| agreement	56
Obligations Number Of Agreements \| agreement	56
Accrual for Environmental Loss Contingencies	$ 1
Obligations Number of Agreements, Subsidiaries \| agreement	527
Subsidiary Guarantee, Maximum Undiscounted Exposure	$ 5,398
Guarantee Obligations [Member]
Schedule Of Contingent Contractual Obligations [Line Items]
Guarantor Obligations, Maximum Exposure, Undiscounted	$ 4,368
Number of Agreements \| agreement	24
Obligations Number Of Agreements \| agreement	24
Obligations Number of Agreements, Subsidiaries \| agreement	43
Subsidiary Guarantee, Maximum Undiscounted Exposure	$ 3,265
Financial Standby Letter of Credit [Member] \| Unsecured Debt [Member]
Schedule Of Contingent Contractual Obligations [Line Items]
Guarantor Obligations, Maximum Exposure, Undiscounted	$ 174
Number of Agreements \| agreement	9
Obligations Number Of Agreements \| agreement	9
Financial Standby Letter of Credit [Member] \| Secured Debt [Member]
Schedule Of Contingent Contractual Obligations [Line Items]
Guarantor Obligations, Maximum Exposure, Undiscounted	$ 9
Number of Agreements \| agreement	15
Obligations Number Of Agreements \| agreement	15
Obligations Number of Agreements, Subsidiaries \| agreement	383
Surety Bond \| Secured Debt [Member]
Schedule Of Contingent Contractual Obligations [Line Items]
Obligations Number of Agreements, Subsidiaries \| agreement	101
Subsidiary Guarantee, Maximum Undiscounted Exposure	$ 73
Standby Letters of Credit [Member] \| Secured Debt [Member]
Schedule Of Contingent Contractual Obligations [Line Items]
Guarantor Obligations, Maximum Exposure, Undiscounted	$ 159
Number of Agreements \| agreement	8
Obligations Number Of Agreements \| agreement	8
Subsidiary Guarantee, Maximum Undiscounted Exposure	$ 2,060
Minimum [Member] \| Guarantee Obligations [Member]
Schedule Of Contingent Contractual Obligations [Line Items]
Loss Contingency, Estimate of Possible Loss	1
Subsidiary Guarantee, Maximum Undiscounted Exposure	1
Minimum [Member] \| Financial Standby Letter of Credit [Member] \| Unsecured Debt [Member]
Schedule Of Contingent Contractual Obligations [Line Items]
Loss Contingency, Estimate of Possible Loss	1
Minimum [Member] \| Financial Standby Letter of Credit [Member] \| Secured Debt [Member]
Schedule Of Contingent Contractual Obligations [Line Items]
Loss Contingency, Estimate of Possible Loss	1
Subsidiary Guarantee, Maximum Undiscounted Exposure	1
Minimum [Member] \| Surety Bond \| Secured Debt [Member]
Schedule Of Contingent Contractual Obligations [Line Items]
Subsidiary Guarantee, Maximum Undiscounted Exposure	1
Maximum [Member] \| Guarantee Obligations [Member]
Schedule Of Contingent Contractual Obligations [Line Items]
Loss Contingency, Estimate of Possible Loss	894
Subsidiary Guarantee, Maximum Undiscounted Exposure	512
Maximum [Member] \| Financial Standby Letter of Credit [Member] \| Unsecured Debt [Member]
Schedule Of Contingent Contractual Obligations [Line Items]
Loss Contingency, Estimate of Possible Loss	60
Maximum [Member] \| Financial Standby Letter of Credit [Member] \| Secured Debt [Member]
Schedule Of Contingent Contractual Obligations [Line Items]
Loss Contingency, Estimate of Possible Loss	4
Subsidiary Guarantee, Maximum Undiscounted Exposure	85
Maximum [Member] \| Surety Bond \| Secured Debt [Member]
Schedule Of Contingent Contractual Obligations [Line Items]
Subsidiary Guarantee, Maximum Undiscounted Exposure	$ 10

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Total costs accrued as of the balance sheet date for environmental loss contingencies.

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Maximum potential amount of future payments (undiscounted) the guarantor could be required to make under the guarantee or each group of similar guarantees before reduction for potential recoveries under recourse or collateralization provisions.

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Reflects the estimated amount of loss from the specified contingency as of the balance sheet date.

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