Discontinued Operations - Additional Information (Detail) - Spin-off - Veoneer, Inc. - USD ($) $ in Millions		3 Months Ended	12 Months Ended
	Jun. 29, 2018	Jun. 30, 2019	Dec. 31, 2020	Dec. 31, 2018	Jun. 30, 2018
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Spin-off completion date	Jun. 29, 2018
Cash	$ 1,000.0				$ 5.0
Net assets	2,129.0				$ 2,123.0
Accumulated other comprehensive loss	13.0
Non-controlling interest	112.0
Reduction to retained earnings	$ 2,030.0
Contribution due to adjustment of deferred tax assets		$ 0.2	$ 2.5
Other Income (Expense), Net
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Separation costs				$ 76.3