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Goodwill and Intangible Assets, Net Goodwill Table (Details) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2020	Dec. 31, 2019	Mar. 31, 2020
Goodwill [Line Items]
Gross carrying amount of goodwill	$ 334	$ 388	$ 369
Goodwill arising from acquisitions		19	34
Foreign exchange adjustments to goodwill			1
Accumulated impairment of goodwill	(87)	(90)	(87)
Impairment of goodwill		(3)
Goodwill		298	282
Automotive Segment
Goodwill [Line Items]
Gross carrying amount of goodwill	328	341	336
Goodwill arising from acquisitions		5	8
Accumulated impairment of goodwill	(87)	(87)	(87)
Impairment of goodwill	(87)
Goodwill		254	249	$ 249
Food Packaging Segment
Goodwill [Line Items]
Gross carrying amount of goodwill	$ 6	6	6
Goodwill		6	6
Metals Segment
Goodwill [Line Items]
Gross carrying amount of goodwill		4	4
Goodwill arising from acquisitions			4
Goodwill		4	4
Home Fashion Segment
Goodwill [Line Items]
Gross carrying amount of goodwill		24	23
Goodwill arising from acquisitions		1	22
Foreign exchange adjustments to goodwill			1
Accumulated impairment of goodwill		(3)
Impairment of goodwill		(3)
Goodwill		21	$ 23
Pharma Segment
Goodwill [Line Items]
Gross carrying amount of goodwill		13
Goodwill arising from acquisitions		13
Goodwill		$ 13