Stock-Based Compensation Expense (Stock Options) (Detail) - Employee Stock Option - $ / shares		7 Months Ended	12 Months Ended
	Jun. 04, 2018	Dec. 31, 2018	Dec. 31, 2019	Dec. 31, 2018
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Beginning (in shares)			581,124,000
Granted (in shares)	562,217	581,124,000	0
Exercised (in shares)		0	0
Forfeited (in shares)		0	23,826,000
Expired (in shares)		0	0
Ending (in shares)	0	581,124,000	557,298,000	581,124,000
Exercisable as of December 31, 2018 (in shares)		14,180,000	180,424,000	14,180,000
Vested and expected to vest as of December 31, 2018 (in shares)		581,124,000	557,298,000	581,124,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Abstract]
Beginning balance (usd per share)			$ 25.47
Granted (usd per share)		$ 25.47	0.00
Exercise (usd per share)		0.00	0.00
Forfeited (usd per share)		0.00	25.70
Expired (usd per share)		0.00	0.00
Ending balance (usd per share)	$ 0.00	25.47	25.46	$ 25.47
Exercisable as of December 31, 2018 (usd per share)		18.75	24.97	18.75
Vested and expected to vest as of December 31, 2018 (usd per share)		$ 25.47	$ 25.46	$ 25.47
Weighted-Average Remaining Contractual Term, outstanding			3 years 4 months 24 days	4 years 4 months 24 days
Weighted-Average Remaining Contractual Term, vested and expected to vest			3 years 4 months 24 days