Non-controlling Interest - Ownership of Common Units (Details) - shares	Dec. 31, 2018	Sep. 30, 2018	Dec. 31, 2017
RSAs | Director Compensation Program
Noncontrolling Interest [Line Items]
Unvested (in shares)	61,000
Common Units
Noncontrolling Interest [Line Items]
Unvested (in shares)	3,986,000	4,000,000	4,783,000
Stock Options | 2005 Common Membership Unit Plan [Member]
Ownership %
Unit options vested and exercisable (in shares)			110,000
Switch, Ltd.
Units
Switch, Inc.’s ownership of common units (in shares)		55,157,000	35,938,000
Non-controlling interest holders’ ownership of common units (in shares)		187,440,000	211,676,000
Total common units (in shares)		242,597,000	247,614,000
Ownership %
Noncontrolling Interest, Ownership Percentage by Parent		22.70%	14.50%
Non-controlling interest holders’ ownership of common units		77.30%	85.50%