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Fair Value (Tables)

3 Months Ended

Mar. 31, 2025

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

Financial Assets and Liabilities, Measured at Fair Value Recurring Basis [Table Text Block]

The following table presents a summary of fair value measurements by level and carrying values for items measured at fair value on a recurring basis in the Condensed Consolidated Balance Sheets:

(in millions)						Quoted Prices in Active Markets (Level 1)						Other Observable Inputs (Level 2)						Unobservable Inputs (Level 3)						Total Fair and Carrying Value
March 31, 2025
Cash and cash equivalents						$	30,183					$	534					$	—					$	30,717
Debt securities - available-for-sale:
U.S. government and agency obligations						3,936						129						—						4,065
State and municipal obligations						—						6,747						—						6,747
Corporate obligations						30						22,730						478						23,238
U.S. agency mortgage-backed securities						—						9,603						—						9,603
Non-U.S. agency mortgage-backed securities						—						2,794						—						2,794
Total debt securities - available-for-sale						3,966						42,003						478						46,447
Equity securities						1,708						213						215						2,136
Total assets at fair value						$	35,857					$	42,750					$	693					$	79,300
Percentage of total assets at fair value						45		%				54		%				1		%				100		%
December 31, 2024
Cash and cash equivalents						$	25,248					$	64					$	—					$	25,312
Debt securities - available-for-sale:
U.S. government and agency obligations						4,194						133						—						4,327
State and municipal obligations						—						6,984						—						6,984
Corporate obligations						29						22,841						437						23,307
U.S. agency mortgage-backed securities						—						9,584						—						9,584
Non-U.S. agency mortgage-backed securities						—						2,717						—						2,717
Total debt securities - available-for-sale						4,223						42,259						437						46,919
Equity securities						1,859						24						65						1,948
Total assets at fair value						$	31,330					$	42,347					$	502					$	74,179
Percentage of total assets at fair value						42		%				57		%				1		%				100		%

Fair Value Measurements, Nonrecurring [Table Text Block]

The following table presents a summary of fair value measurements by level and carrying values for certain financial instruments not measured at fair value on a recurring basis in the Condensed Consolidated Balance Sheets:

(in millions)						Quoted Prices in Active Markets (Level 1)						Other Observable Inputs (Level 2)						Unobservable Inputs (Level 3)						Total Fair Value						Total Carrying Value
March 31, 2025
Debt securities - held-to-maturity						$	464					$	25					$	—					$	489					$	492
Long-term debt and other financing obligations						$	—					$	71,337					$	—					$	71,337					$	76,036
December 31, 2024
Debt securities - held-to-maturity						$	482					$	26					$	—					$	508					$	512
Long-term debt and other financing obligations						$	—					$	70,565					$	—					$	70,565					$	75,604

X

- 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/exampleRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
-Section 55
-Paragraph 100
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482078/820-10-55-100

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482106/820-10-50-2

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
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-URI https://asc.fasb.org/1943274/2147482106/820-10-50-2

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Topic 820
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-Name Accounting Standards Codification
-Section 50
-Paragraph 3
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482106/820-10-50-3

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- Definition

Tabular disclosure of assets and liabilities by class, including financial instruments measured at fair value that are classified in shareholders' equity, if any, that are measured at fair value on a nonrecurring basis in periods after initial recognition (for example, impaired assets). Disclosures may include, but are not limited to: (a) the fair value measurements recorded and the reasons for the measurements and (b) the level within the fair value hierarchy in which the fair value measurements are categorized in their entirety (levels 1, 2, 3).

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482106/820-10-50-2

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482106/820-10-50-2

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Tabular disclosure of assets and liabilities, including [financial] instruments measured at fair value that are classified in stockholders' equity, if any, that are measured at fair value on a recurring basis. The disclosures contemplated herein include the fair value measurements at the reporting date by the level within the fair value hierarchy in which the fair value measurements in their entirety fall, segregating fair value measurements using quoted prices in active markets for identical assets (Level 1), significant other observable inputs (Level 2), and significant unobservable inputs (Level 3).

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482106/820-10-50-2

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482106/820-10-50-2

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