Fair Value Measurements (Details) - Financial Instruments - USD ($) $ in Millions	Mar. 31, 2024	Dec. 31, 2023
Financial Instruments
Short-term securities	$ 4,682	$ 5,137
Carrying Value [Member]
Financial Instruments
Short-term securities	4,682	5,137
Debt	7,932	7,931
Commercial paper	100	100
Fair Value [Member]
Financial Instruments
Short-term securities	4,682	5,137
Debt	7,406	7,645
Commercial paper	100	100
Fair Value [Member] \| Level 1 [Member]
Financial Instruments
Short-term securities	999	1,171
Debt	0	0
Commercial paper	0	0
Fair Value [Member] \| Level 2 [Member]
Financial Instruments
Short-term securities	3,634	3,912
Debt	7,406	7,645
Commercial paper	100	100
Fair Value [Member] \| Level 3 [Member]
Financial Instruments
Short-term securities	49	54
Debt	0	0
Commercial paper	$ 0	$ 0

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.

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//1943274/2147479440/944-210-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//1943274/2147479853/942-210-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

Name:	us-gaap_CommercialPaper
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant