Foreign Exchange (Gain) Loss, Net (Details) - USD ($) $ in Millions	3 Months Ended
Mar. 31, 2026	Mar. 31, 2025
Schedule Of Foreign Exchange Transactions [Line Items]
Unrealized Foreign Exchange (Gain) Loss	$ (1)	$ (45)
Foreign Exchange (Gain) Loss, Net	(2)	10
Translation of U.S. Dollar Risk Management Contracts Issued From Canada [Member]
Schedule Of Foreign Exchange Transactions [Line Items]
Unrealized Foreign Exchange (Gain) Loss	(1)	(87)
Foreign Exchange on Settlements	0	98
Translation of Intercompany Notes [Member]
Schedule Of Foreign Exchange Transactions [Line Items]
Unrealized Foreign Exchange (Gain) Loss	0	42
Foreign Exchange on Settlements	(1)	(42)
Other Monetary Revaluations [Member]
Schedule Of Foreign Exchange Transactions [Line Items]
Foreign Exchange on Settlements	$ 0	$ (1)

Amount, before tax, of unrealized gain (loss) from foreign currency transaction.

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Topic 946
-SubTopic 830
-Name Accounting Standards Codification
-Section 55
-Paragraph 10
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479168/946-830-55-10

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 946
-SubTopic 220
-Name Accounting Standards Codification
-Section 45
-Paragraph 6
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-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479105/946-220-45-6

Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 946
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-Name Accounting Standards Codification
-Section S99
-Paragraph 1
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Reference 4: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 830
-SubTopic 20
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Reference 5: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 830
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Reference 6: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 230
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-Name Accounting Standards Codification
-Section 45
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-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482740/230-10-45-28

Name:	us-gaap_ForeignCurrencyTransactionGainLossUnrealized
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration