Stock-Based Compensation - Stock-Based Compensation Cost (Details) - USD ($) $ in Millions	3 Months Ended	9 Months Ended
Sep. 30, 2026	Sep. 30, 2025	Sep. 30, 2026	Sep. 30, 2025
Stock-based compensation cost, allocation of recognized costs
Pre-tax stock-based compensation cost	$ 535	$ 444	$ 1,539	$ 1,285
Income tax benefits	(205)	(228)	(558)	(578)
Net stock-based compensation cost	330	215	981	707
Income Statement Location [Axis]: us-gaap:CostOfRevenue
Stock-based compensation cost, allocation of recognized costs
Pre-tax stock-based compensation cost	59	67	208	199
Income Statement Location [Axis]: us-gaap:ResearchAndDevelopmentExpense
Stock-based compensation cost, allocation of recognized costs
Pre-tax stock-based compensation cost	197	144	555	393
Income Statement Location [Axis]: us-gaap:SellingGeneralAndAdministrativeExpense
Stock-based compensation cost, allocation of recognized costs
Pre-tax stock-based compensation cost	$ 278	$ 233	$ 776	$ 694

Amount of expense for award under share-based payment arrangement. Excludes amount capitalized.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 718
-SubTopic 10
-Name Accounting Standards Codification
-Section S45
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479983/718-10-S45-1

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 718
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
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-Publisher FASB
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Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 718
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (h)(1)(i)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480429/718-10-50-2

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Amount, after tax, of expense for award under share-based payment arrangement.

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Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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-SubTopic 10
-Name Accounting Standards Codification
-Section 50
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-Subparagraph (h)(1)(i)
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+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 718
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (h)(1)
-Publisher FASB
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Amount of tax benefit for recognition of expense of award under share-based payment arrangement.

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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-Name Accounting Standards Codification
-Section 50
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-URI https://asc.fasb.org/1943274/2147480429/718-10-50-2

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