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v3.25.3

Debt - Classification and Credit Facilities (Detail) - USD ($) | 9 Months Ended |
--- | --- | ---
Sep. 30, 2025 | Dec. 31, 2024
Debt |  |
Debt maturing or subject to remarketing within twelve months | $ 3,900,000,000 |
Debt classified as long-term due to intent and ability to refinance on long-term basis | 3,000,000,000 |
Current portion of long-term debt | 880,000,000 | $ 1,359,000,000
Tax Exempt Bonds [Member] |  |
Debt |  |
Debt maturing or subject to remarketing within twelve months | 188,000,000 |
Debt with interest rate periods that expire in the next 12 months | $ 1,500,000,000 |
Tax Exempt Bonds [Member] | Minimum [Member] |  |
Debt |  |
Interest rate (as a percent) | 0.70% | 0.70%
Tax Exempt Bonds [Member] | Maximum [Member] |  |
Debt |  |
Interest rate (as a percent) | 4.60% | 4.60%
Commercial Paper Program [Member] |  |
Debt |  |
Debt maturing or subject to remarketing within twelve months | $ 861,000,000 |
Debt term | 397 days |
Commercial paper borrowings | $ 861,000,000,000 |
0.750% senior notes due November 2025 [Member] |  |
Debt |  |
Debt maturing or subject to remarketing within twelve months | 500,000,000 |
Debt with interest rate periods that expire in the next 12 months | 0.75 |
7.1% senior notes due August 2026 [Member] |  |
Debt |  |
Debt maturing or subject to remarketing within twelve months | $ 223,000,000 |
Interest rate (as a percent) | 7.10% |
Canadian Senior Notes [Member] |  |
Debt |  |
Debt maturing or subject to remarketing within twelve months | $ 359,000,000 |
Interest rate (as a percent) | 2.60% | 2.60%
Other Debt [Member] |  |
Debt |  |
Debt maturing or subject to remarketing within twelve months | $ 380,000,000 |
Revolving Credit Facility [Member] |  |
Debt |  |
Maximum capacity | 3,500,000,000 |
Outstanding borrowings under credit facility | 0 |
Letters of credit outstanding | 227,000,000 |
Unused and available credit capacity | $ 2,400,000,000 |
Revolving Credit Facility [Member] | Minimum [Member] |  |
Debt |  |
Spread rate (as a percent) | 0.585% |
Revolving Credit Facility [Member] | Maximum [Member] |  |
Debt |  |
Spread rate (as a percent) | 1.025% |
Other Letter Of Credit Lines [Member] |  |
Debt |  |
Letters of credit outstanding | $ 887,000,000 |

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- Definition Carrying value as of the balance sheet date of short-term borrowings using unsecured obligations issued by banks, corporations and other borrowers to investors. The maturities of these money market securities generally do not exceed 270 days. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 944 -SubTopic 210 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(a)(16)(a)(1)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147478777/944-210-S99-1 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 942 -SubTopic 210 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(13)(2)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147478546/942-210-S99-1 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 210 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(19)(a)(3)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1 + Details
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- Definition The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(22)) -SubTopic 10 -Topic 210 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 942 -SubTopic 210 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(16)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147478546/942-210-S99-1 Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 944 -SubTopic 210 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(a)(16)(a)(2)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147478777/944-210-S99-1 + Details
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