Income Taxes - Reconciliation of Income Tax Expense (Benefit) (Details)	2 Months Ended	10 Months Ended	12 Months Ended
	Dec. 31, 2017	Oct. 31, 2017	Dec. 31, 2019	Dec. 31, 2018
Income Tax Disclosure [Abstract]
Statutory federal income tax rate	35.00%	35.00%	21.00%	21.00%
State income taxes, net of federal income tax benefit	3.60%	2.90%	(1.20%)	2.80%
Goodwill impairment	0.00%	0.00%	(26.40%)	0.00%
Tax Reform	210.60%	0.00%	(0.20%)	17.20%
Global intangible low-taxed income	0.00%	0.00%	(0.40%)	1.80%
CenturyLink acquisition transaction costs	11.30%	0.00%	0.00%	0.00%
Uncertain tax positions	1.20%	0.10%	0.00%	0.50%
Effective Income Tax Rate Reconciliation, Base Erosion and Anti-abuse Tax, Percent	0.00%	0.00%	(0.40%)	0.00%
Net foreign income tax	(19.30%)	0.90%	(0.80%)	(4.80%)
Executive compensation limitation	5.40%	0.90%	(0.20%)	1.20%
Research and development credits	(0.90%)	(1.20%)	0.10%	(1.30%)
Other, net	4.70%	0.10%	(0.10%)	(1.90%)
Effective income tax rate	251.60%	38.70%	(8.60%)	36.50%