Derivative Financial Instruments - Additional Information (Detail) - USD ($) $ in Millions	1 Months Ended	3 Months Ended		6 Months Ended		12 Months Ended
	Jan. 31, 2017	Jun. 30, 2021	Mar. 31, 2020	Jun. 30, 2022	Jun. 30, 2021	Dec. 31, 2020
Cross Currency Interest Rate Swap [Member]
Derivative [Line Items]
Proceeds from cross-currency interest rate swaps upon termination			$ 56.2
Paid termination fees			0.9
Gain (loss) in AOCIL				$ 44.8	$ 44.8
AOCIL tax expense (benefit)				$ 11.4	11.4
Cross Currency Interest Rate Swap [Member] | Interest Income [Member]
Derivative [Line Items]
Cumulative translation adjustment recognized net interest income (expense), net amount			$ 3.3
Interest Rate Swap [Member]
Derivative [Line Items]
Paid termination fees						$ 0.1
Maturity date of interest rate swap	Jan. 31, 2020
Fair value of swap						34.7
Net interest expense						$ 0.1
Interest Rate Swap [Member] | Altra Credit Agreement [Member]
Derivative [Line Items]
Non-cash interest expense from AOCIL to earnings		$ 2.3			4.7
Non-cash interest expense, tax benefit from AOCIL to earnings		$ 0.7			$ 1.4