Discontinued Operations and Disposal Groups - Narrative (Details) - USD ($)			6 Months Ended	9 Months Ended
	Aug. 10, 2020	Oct. 30, 2019	Jun. 30, 2020	Sep. 30, 2020	Sep. 30, 2019	Feb. 03, 2020
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Assets impairment charge			$ 144,000,000	$ 168,000,000	$ 0
Proceeds from divestitures				$ 198,000,000	$ 0
Disposal Group, Disposed of by Sale, Not Discontinued Operations | Honda VNBS Product Line
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Disposal group, including discontinued operation, consideration						$ 176,000,000
Disposal group, not discontinued operation, gain (loss) on disposal, net		$ 175,000,000
Disposal group, not discontinued operation, gain (loss) on disposal, net of closing costs		$ 77,000,000
Disposal Group, Disposed of by Sale, Not Discontinued Operations | Veoneer Nissin Brakes Systems
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Disposal group, including discontinued operation, consideration	$ 1
Proceeds from divestitures	$ 22,000,000