Financing - Summary of Debt (Parenthetical) (Detail)	12 Months Ended
Financing - Summary of Debt (Parenthetical) (Detail)	Dec. 31, 2025	Dec. 31, 2024
7.125% Senior Notes Due 2028 [Member]
Debt Instrument [Line Items]
Maturity month and year	2028-07
Interest rate	7.125%	7.125%
5.00% Senior Notes Due March 2027 [Member]
Debt Instrument [Line Items]
Maturity month and year	2027-03
Interest rate	5.00%	5.00%
8.25% Senior Notes Due March 2027 [Member]
Debt Instrument [Line Items]
Maturity month and year	2027-03
Interest rate	8.25%	8.25%
9.50% senior secured notes due December 2031 [Member]
Debt Instrument [Line Items]
Maturity month and year	2031-12
Interest rate	9.50%	9.50%
4.75% Senior Secured Notes Due September 2029 [Member]
Debt Instrument [Line Items]
Maturity month and year	2029-09
Interest rate	4.75%	4.75%
6.00% Senior Secured Notes Due March 2026 [Member]
Debt Instrument [Line Items]
Maturity month and year	2026-03
Interest rate	6.00%	6.00%
Senior secured term loan due December 2029 [Member]
Debt Instrument [Line Items]
Maturity month and year	2029-12

Vistance Networks, Inc. 10-K