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Debt - Senior Credit Facilities Narrative (Details) ¥ in Millions, $ in Millions				1 Months Ended			3 Months Ended	6 Months Ended			12 Months Ended
	Aug. 11, 2025	Jul. 30, 2025 USD ($)	Feb. 12, 2025	Nov. 30, 2024 USD ($)	Jan. 31, 2023 CNY (¥)	Mar. 31, 2022 USD ($)	Mar. 31, 2024 CNY (¥)	Jun. 30, 2025 USD ($)	Jun. 30, 2025 CNY (¥)	Jun. 30, 2024 USD ($)	Dec. 31, 2024 USD ($)	Mar. 06, 2025 CNY (¥)	Dec. 31, 2024 CNY (¥)	Jun. 30, 2024 CNY (¥)	Apr. 30, 2024 CNY (¥)	Dec. 31, 2023 CNY (¥)
Debt Instrument [Line Items]
Debt instrument, redemption price, percentage								100.00%	100.00%
Proceeds from short-term borrowings								$ 589		$ 160
Repayments of Short-term Debt								555		418
Proceeds from Issuance of Long-Term Debt								2,821		183
Repayments of long-term debt								2,833		$ 485
5 Year Delayed-Draw Term Loan \| Term Loan Facility
Debt Instrument [Line Items]
Debt instrument, term						5 years
Debt instrument, face amount						$ 1,000
Proceeds from Issuance of Long-Term Debt								$ 480
5 Year Delayed-Draw Term Loan \| Term Loan Facility \| Subsequent Event
Debt Instrument [Line Items]
Repayments of long-term debt		$ 150
January 2023 CSIT One Year Working Capital Term Loan \| January 2023 CSIT One Year Working Capital Term Loan
Debt Instrument [Line Items]
Debt instrument, term					12 months
Debt instrument, face amount \| ¥					¥ 800
Repayments of Debt \| ¥							¥ 800
January 2023 CSIT One Year Working Capital Term Loan \| January 2023 CSIT One Year Working Capital Term Loan \| Variable Interbank Interest Rate
Debt Instrument [Line Items]
Debt instrument, basis spread on variable rate					0.50%
June 2024 CNC Three Year Working Capital Loan \| June 2024 CNC Three Year Working Capital Loan
Debt Instrument [Line Items]
Debt instrument, face amount \| ¥														¥ 800
Debt Instrument, Interest Rate, Stated Percentage														2.75%
Proceeds from Issuance of Long-Term Debt \| ¥									¥ 720
Secured Debt \| Amended restated receivable purchasing facility
Debt Instrument [Line Items]
Percentage of fair value of sales receivables								100.00%	100.00%
Transfer of financial assets accounted for as sales, amount derecognized								$ 802			$ 1,500
Proceeds collected on accounts receivable sold under factoring facilities								764			1,500
Trade Receivables Pledged As Collateral								$ 95
Europe Factoring Agreements
Debt Instrument [Line Items]
Transfer of financial assets accounted for as sales, non-recourse basis, account receivable percentage								100.00%
Japan Factoring Agreements
Debt Instrument [Line Items]
Transfer of financial assets accounted for as sales, non-recourse basis, account receivable percentage								100.00%
Singapore Factoring Agreements
Debt Instrument [Line Items]
Transfer of financial assets accounted for as sales, non-recourse basis, account receivable percentage								90.00%
China Factoring Agreements
Debt Instrument [Line Items]
Transfer of financial assets accounted for as sales, non-recourse basis, account receivable percentage								100.00%
China, Europe, Japan and Singapore Factoring Agreements
Debt Instrument [Line Items]
Transfer of financial assets accounted for as sales, amount derecognized								$ 356			700
Proceeds collected on accounts receivable sold under factoring facilities								337			640
Master Discounting Agreement
Debt Instrument [Line Items]
Transfer of financial assets accounted for as sales, amount derecognized								39			$ 100
November 2024 US Term Loan \| Term Loan Facility
Debt Instrument [Line Items]
Debt instrument, term				364 days
Debt instrument, face amount				$ 1,000
Proceeds from short-term borrowings								500
Repayments of Short-term Debt								$ 500
November 2024 US Term Loan \| Term Loan Facility \| Minimum \| Term SOFR
Debt Instrument [Line Items]
Debt instrument, basis spread on variable rate				1.30%
November 2024 US Term Loan \| Term Loan Facility \| Minimum \| Base Rate
Debt Instrument [Line Items]
Debt instrument, basis spread on variable rate				0.30%
November 2024 US Term Loan \| Term Loan Facility \| Maximum \| Term SOFR
Debt Instrument [Line Items]
Debt instrument, basis spread on variable rate				2.25%
November 2024 US Term Loan \| Term Loan Facility \| Maximum \| Base Rate
Debt Instrument [Line Items]
Debt instrument, basis spread on variable rate				1.25%
March 2025 CNC Three Year Working Capital Loan \| March 2025 CNC Three Year Working Capital Loan
Debt Instrument [Line Items]
Debt instrument, face amount \| ¥												¥ 750
Proceeds from Issuance of Long-Term Debt \| ¥									¥ 509
U.S. Credit Agreements \| Minimum
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Increase (Decrease)			0.25%
U.S. Credit Agreements \| Maximum
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Increase (Decrease)			0.30%
U.S. Credit Agreements \| Term Loan Facility \| Subsequent Event
Debt Instrument [Line Items]
Debt instrument, term	5 years
Various senior notes \| Maximum
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Increase (Decrease)			0.50%
December 2024 CNC Three Year Working Capital Loan \| December 2024 CNC Three Year Working Capital Loan
Debt Instrument [Line Items]
Debt instrument, face amount \| ¥													¥ 1,000
Proceeds from Issuance of Long-Term Debt \| ¥									¥ 500
Revolving Credit Facility \| Revolving Credit Facility
Debt Instrument [Line Items]
Line of credit facility, maximum borrowing capacity						$ 1,750
Revolving Credit Facility \| Revolving Credit Facility \| Minimum \| Variable Interbank Interest Rate
Debt Instrument [Line Items]
Debt instrument, basis spread on variable rate								1.00%	1.00%
Revolving Credit Facility \| Revolving Credit Facility \| Maximum \| Variable Interbank Interest Rate
Debt Instrument [Line Items]
Debt instrument, basis spread on variable rate								2.00%	2.00%
Revolving Credit Facility \| China Revolving Credit Facility
Debt Instrument [Line Items]
Line of credit facility, maximum borrowing capacity \| ¥					¥ 1,750								¥ 550		¥ 750
December 2023 CNC Three Year Working Capital Loan \| December 2023 CNC Three Year Working Capital Loan
Debt Instrument [Line Items]
Debt instrument, face amount \| ¥																¥ 800
Debt Instrument, Interest Rate, Stated Percentage																2.80%