Reportable Segments - Reconciliation of Reportable Segment Net Income (Loss) to Consolidated Net Income (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
Segment Reporting Information [Line Items]
(Loss) gain reclassified from accumulated OCI into income	$ 157	$ 209
Research, development, and engineering expenses	(270)	(258)
Amortization of intangibles	(28)	(30)
Interest expense, net	(82)	(83)
Income tax benefit	(55)	(71)
Net income	185	225
Operating Segments
Segment Reporting Information [Line Items]
(Loss) gain reclassified from accumulated OCI into income	583	453
Impact of constant-currency reporting	(227)	(283)
Research, development, and engineering expenses	(236)	(216)
Income tax benefit	(162)	(125)
Operating Segments | Reportable Segments
Segment Reporting Information [Line Items]
(Loss) gain reclassified from accumulated OCI into income	599	436
Operating Segments | Hemlock and Emerging Growth Businesses
Segment Reporting Information [Line Items]
(Loss) gain reclassified from accumulated OCI into income	(16)	17
Research, development, and engineering expenses	(26)	(21)
Income tax benefit	2	(8)
Segment Reporting, Reconciling Item, Excluding Corporate Nonsegment
Segment Reporting Information [Line Items]
Impact of constant-currency reporting	(180)	(226)
Translated earnings contract (loss) gain, net	(101)	39
Translation (loss) gain on Japanese yen-denominated debt, net	(43)	81
Research, development, and engineering expenses	(34)	(42)
Amortization of intangibles	(28)	(30)
Interest expense, net	(63)	(61)
Income tax benefit	107	54
Restructuring, impairment and other charges and credits	7	9
Other corporate items	(63)	(52)
Net income	$ 185	$ 225