Annual report pursuant to Section 13 and 15(d)

Income Taxes - Reconciliation between Provision for Income Taxes at Statutory Rate and Provision for Income Taxes at Effective Tax Rate (Parenthetical) (Detail)

v3.19.3.a.u2
Income Taxes - Reconciliation between Provision for Income Taxes at Statutory Rate and Provision for Income Taxes at Effective Tax Rate (Parenthetical) (Detail) - USD ($)
$ in Millions
Dec. 31, 2018
Dec. 31, 2017
Income Tax Disclosure [Abstract]    
Reduction to deferred income tax benefit and offsetting valuation allowance expense. $ 31.0 $ 32.8