Long-lived Assets Measured at Fair Value (Level 3) on a Nonrecurring Basis (Parenthetical) (Detail) - Fair Value, Measurements, Nonrecurring - USD ($) $ in Millions		3 Months Ended		12 Months Ended
		Dec. 31, 2017	Mar. 31, 2017	Dec. 31, 2017
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Goodwill impairment loss	[1]			$ 234.2
Impairment charge to amortization of intangibles of contract with OEM customer	[2]			$ 12.0
Autoliv Nissin Brake Systems
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Goodwill impairment loss		$ 234.2
M/A-COM Auto Solutions Business | Customer Contract
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Impairment charge to amortization of intangibles of contract with OEM customer			$ 12.0

[1] In the fourth quarter of 2017, the Company recognized an impairment charge of the full goodwill related to ANBS, resulting in an impairment loss of $234.2 million, which was included in earnings for the period. The primary driver of the goodwill impairment was due to the lower expected long-term operating cash flow performance of the business unit as of the measurement date. The remaining goodwill balance as of March 31, 2018 and December 31, 2017 was not measured at fair value on a nonrecurring basis as impairment indicators did not exist.

[2] In the first quarter of 2017, the Company recognized an impairment charge to amortization of intangibles of $12 million related to a contract with an OEM customer of M/A-COM products, which was included in earnings for the period. At December 31, 2017 the intangible value related to this customer contract was fully amortized. The remaining intangibles balance as of March 31, 2018 and December 31, 2017 was not measured at fair value on a nonrecurring basis as impairment indicators did not exist.