Investments - Schedule of Investments by Major Security Type (Details) - USD ($) $ in Millions	Jun. 30, 2026	Dec. 31, 2025
Short-term investments
Debt securities, amortized cost	$ 4,138
Debt securities, total estimated fair value	4,121
Total short-term investments	5,248	$ 4,454
Balance Sheet Location [Axis]: us-gaap:ShortTermInvestments
Short-term investments
Debt securities, amortized cost	4,125	3,311
Debt securities, gross unrealized gains	3	13
Debt securities, gross unrealized losses	(12)	(2)
Debt securities, total estimated fair value	4,116	3,322
Time deposits	1,132	1,132
Amortized Cost	5,257	4,443
Total short-term investments	5,248	4,454
Corporate debt securities \| Balance Sheet Location [Axis]: us-gaap:ShortTermInvestments
Short-term investments
Debt securities, amortized cost	3,090	2,277
Debt securities, gross unrealized gains	2	11
Debt securities, gross unrealized losses	(7)	0
Debt securities, total estimated fair value	3,085	2,288
Mortgage-backed and asset-backed securities \| Balance Sheet Location [Axis]: us-gaap:ShortTermInvestments
Short-term investments
Debt securities, amortized cost	570	441
Debt securities, gross unrealized gains	1	2
Debt securities, gross unrealized losses	(4)	(2)
Debt securities, total estimated fair value	567	441
Government bonds \| Balance Sheet Location [Axis]: us-gaap:ShortTermInvestments
Short-term investments
Debt securities, amortized cost	370	262
Debt securities, gross unrealized gains	0	0
Debt securities, gross unrealized losses	(1)	0
Debt securities, total estimated fair value	369	262
Commercial paper \| Balance Sheet Location [Axis]: us-gaap:ShortTermInvestments
Short-term investments
Debt securities, amortized cost	39	182
Debt securities, gross unrealized gains	0	0
Debt securities, gross unrealized losses	0	0
Debt securities, total estimated fair value	39	182
Certificates of deposit \| Balance Sheet Location [Axis]: us-gaap:ShortTermInvestments
Short-term investments
Debt securities, amortized cost	56	149
Debt securities, gross unrealized gains	0	0
Debt securities, gross unrealized losses	0	0
Debt securities, total estimated fair value	$ 56	$ 149

Short Term Investments, Amortized Cost

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Amount, before tax, of unrealized gain in accumulated other comprehensive income (AOCI) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 320
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481800/320-10-50-2

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Amount, before tax, of unrealized loss in accumulated other comprehensive income (AOCI) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 320
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (c)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481800/320-10-50-2

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Amortized cost excluding accrued interest, after allowance for credit loss, of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 326
-SubTopic 30
-Name Accounting Standards Codification
-Section 45
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479130/326-30-45-1

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Amount excluding accrued interest, of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 942
-SubTopic 210
-Name Accounting Standards Codification
-Section S45
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147477657/942-210-S45-1

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 942
-SubTopic 210
-Name Accounting Standards Codification
-Section S50
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478478/942-210-S50-1

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 942
-SubTopic 210
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03(6))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478546/942-210-S99-1

Reference 4: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 326
-SubTopic 30
-Name Accounting Standards Codification
-Section 45
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479130/326-30-45-1

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- Definition

Amount of investments including trading securities, available-for-sale securities, held-to-maturity securities, and short-term investments classified as other and current.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 210
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
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Any certificate of deposit or savings account held by a bank or other financial institution for a short-term specified period of time. Because of their short-term, time deposits are considered highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Generally, only investments with original maturities of three months or less qualify under that definition. Original maturity means original maturity to the entity holding the investment. For example, both a three-month US Treasury bill and a three-year Treasury note purchased three months from maturity qualify as cash equivalents. However, a Treasury note purchased three-years ago does not become a cash equivalent when its remaining maturity is three months.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 210
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
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-Subparagraph (SX 210.5-02(1))
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