Leases - Additional Information (Detail) - USD ($) $ in Millions	3 Months Ended
	Jun. 30, 2019	Dec. 31, 2019
Operating Leased Assets [Line Items]
Impairment of right-of-use	$ 25
Minimum
Operating Leased Assets [Line Items]
Operating lease, term of contract		1 year
Maximum
Operating Leased Assets [Line Items]
Operating lease, term of contract		20 years