Segment, Major Customer and Major Supplier Information - Selected Segment Financial Information (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023	Mar. 31, 2024
Segment Reporting Information [Line Items]
Investment in and advances to non-consolidated affiliates	$ 952		$ 952		$ 905
Total assets	15,560		15,560		14,628
Net sales	4,295	$ 4,107	8,482	$ 8,198
Depreciation and amortization	141	136	281	267
Income tax provision	51	51	111	105
Capital expenditures	369	285	717	618
Operating Segments | North America
Segment Reporting Information [Line Items]
Investment in and advances to non-consolidated affiliates	0		0		0
Total assets	5,910		5,910		5,411
Net sales	1,782	1,722	3,512	3,454
Depreciation and amortization	56	55
Income tax provision	2	6
Capital expenditures	314	218
Operating Segments | Europe
Segment Reporting Information [Line Items]
Investment in and advances to non-consolidated affiliates	557		557		536
Total assets	4,116		4,116		4,049
Net sales	1,115	1,151	2,292	2,332
Depreciation and amortization	43	40
Income tax provision	(16)	13
Capital expenditures	28	34
Operating Segments | Asia
Segment Reporting Information [Line Items]
Investment in and advances to non-consolidated affiliates	395		395		369
Total assets	2,299		2,299		2,206
Net sales	789	640	1,505	1,309
Depreciation and amortization	24	23
Income tax provision	9	10
Capital expenditures	26	17
Operating Segments | South America
Segment Reporting Information [Line Items]
Investment in and advances to non-consolidated affiliates	0		0		0
Total assets	2,163		2,163		2,050
Net sales	672	593	1,285	1,122
Depreciation and amortization	22	20
Income tax provision	31	11
Capital expenditures	11	19
Intersegment Eliminations [Member]
Segment Reporting Information [Line Items]
Investment in and advances to non-consolidated affiliates	0		0		0
Total assets	1,072		1,072		$ 912
Net sales	(63)	1	(112)	(19)
Depreciation and amortization	(4)	(2)
Income tax provision	25	11
Capital expenditures	(10)	(3)
Net sales – third party
Segment Reporting Information [Line Items]
Net sales	4,295	4,107	8,482	8,198
Net sales – third party | Operating Segments | North America
Segment Reporting Information [Line Items]
Net sales	1,779	1,722	3,509	3,454
Depreciation and amortization			114	108
Income tax provision			8	(7)
Capital expenditures			617	493
Net sales – third party | Operating Segments | Europe
Segment Reporting Information [Line Items]
Net sales	1,106	1,131	2,274	2,290
Depreciation and amortization			84	81
Income tax provision			(8)	26
Capital expenditures			58	61
Net sales – third party | Operating Segments | Asia
Segment Reporting Information [Line Items]
Net sales	648	580	1,247	1,177
Depreciation and amortization			47	45
Income tax provision			28	18
Capital expenditures			37	39
Net sales – third party | Operating Segments | South America
Segment Reporting Information [Line Items]
Net sales	655	564	1,235	1,064
Depreciation and amortization			44	40
Income tax provision			56	27
Capital expenditures			25	34
Net sales – third party | Intersegment Eliminations [Member]
Segment Reporting Information [Line Items]
Net sales	107	110	217	213
Depreciation and amortization			(8)	(7)
Income tax provision			27	41
Capital expenditures			(20)	(9)
Net sales – intersegment
Segment Reporting Information [Line Items]
Net sales	0	0	0	0
Net sales – intersegment | Operating Segments | North America
Segment Reporting Information [Line Items]
Net sales	3	0	3	0
Net sales – intersegment | Operating Segments | Europe
Segment Reporting Information [Line Items]
Net sales	9	20	18	42
Net sales – intersegment | Operating Segments | Asia
Segment Reporting Information [Line Items]
Net sales	141	60	258	132
Net sales – intersegment | Operating Segments | South America
Segment Reporting Information [Line Items]
Net sales	17	29	50	58
Net sales – intersegment | Intersegment Eliminations [Member]
Segment Reporting Information [Line Items]
Net sales	$ (170)	$ (109)	$ (329)	$ (232)