CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (UNAUDITED) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
OPERATING ACTIVITIES OF CONTINUING OPERATIONS
Net cash provided by (used in) operating activities of continuing operations (see Note 23)	$ 82	$ (118)
INVESTING ACTIVITIES OF CONTINUING OPERATIONS
Capital expenditures, including tooling outlays	(119)	(190)
Customer advances related to capital expenditures	2	0
Proceeds from settlement of net investment hedges, net	12	12
Proceeds from the sale of business, net	0	3
Proceeds from asset disposals and other, net	11	0
Net cash used in investing activities from continuing operations	(94)	(175)
FINANCING ACTIVITIES OF CONTINUING OPERATIONS
Payments of notes payable	(5)	0
Repayments of debt, including current portion	(346)	(12)
Payments for purchase of treasury stock	0	(100)
Payments for stock-based compensation items	(18)	(23)
Dividends paid to BorgWarner stockholders	(24)	(25)
Dividends paid to noncontrolling stockholders	(4)	(23)
Net cash used in financing activities from continuing operations	(397)	(183)
CASH FLOWS FROM DISCONTINUED OPERATIONS
Operating activities of discontinued operations	0	(10)
Net cash provided by (used in) discontinued operations	0	(10)
Effect of exchange rate changes on cash	22	(11)
Net decrease in cash, cash equivalents and restricted cash	(387)	(497)
Cash and cash equivalents at beginning of year	2,094	1,534
Cash, cash equivalents and restricted cash of continuing operations at end of period	$ 1,707	$ 1,037