Borrowings and Lines of Credit - Narrative (Details) - USD ($)	3 Months Ended
Mar. 31, 2025	Dec. 31, 2024
Line of Credit Facility [Line Items]
Debt instrument, carrying amount	$ 8,412,000,000	$ 8,322,000,000
Unamortized debt issuance cost	$ 42,000,000	$ 45,000,000
Long term debt, average remaining maturity	6 years 2 months 12 days
Unsubordinated Commercial Paper \| Unsecured Notes
Line of Credit Facility [Line Items]
Debt instrument, carrying amount	$ 0
Debt instrument, face amount	1,500,000,000
Five Year Revolving Credit Facility, Amended \| Unsecured Notes
Line of Credit Facility [Line Items]
Debt instrument, carrying amount	0
Line of credit facility, maximum borrowing capacity	$ 1,500,000,000
Debt instrument, term	5 years

Long-term Debt, Average Remaining Maturity

No definition available.

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- Definition

Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt.

+ References

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+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Face (par) amount of debt instrument at time of issuance.

+ References

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+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Period of time between issuance and maturity of debt instrument, in PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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+ Details

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Data Type:	xbrli:stringItemType
Balance Type:	na
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- Definition

Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

+ References

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+ Details

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Balance Type:	credit
Period Type:	instant

- Definition

The remaining balance of debt issuance expenses that were capitalized and are being amortized against income over the lives of the respective bond issues. This does not include the amounts capitalized as part of the cost of the utility plant or asset.

+ References

No definition available.

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Details

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Namespace Prefix:
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Balance Type:
Period Type:

- Details

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Period Type:

- Details

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