Net Income Per Share/Unit - Calculation of Basic and Diluted Net Income Per Share/Unit (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Numerator—basic and diluted:
Net income (loss) attributable to Switch, Inc.—basic and diluted	$ 2,554	$ 6	$ 821	$ 671	$ (66,975)	$ 16,486	$ 14,953	$ 20,328	$ 4,052	$ (15,208)	$ 31,368
Denominator—basic:
Weighted-average shares/units outstanding-basic (in shares)									45,682	8,074	199,047
Basic (in dollars per share)	$ 0.05	$ 0.00	$ 0.02	$ 0.02	$ (2.09)	$ 0.08	$ 0.07	$ 0.10	$ 0.09	$ (1.88)	$ 0.16
Denominator—diluted:
Weighted-average shares/units outstanding-basic (in shares)									45,682	8,074	199,047
Weighted average effect of dilutive securities:
Weighted average shares/units outstanding-diluted (in shares)									45,753	8,074	203,461
Diluted (in dollars per share)	$ 0.05	$ 0.00	$ 0.02	$ 0.02	$ (2.09)	$ 0.08	$ 0.07	$ 0.10	$ 0.09	$ (1.88)	$ 0.15
Stock Options
Weighted average effect of dilutive securities:
Weighted average effect of dilutive securities (in shares)									50	0	230
Incentive Units
Weighted average effect of dilutive securities:
Weighted average effect of dilutive securities (in shares)									0	0	4,184
RSUs
Weighted average effect of dilutive securities:
Weighted average effect of dilutive securities (in shares)									6	0	0
DEUs
Weighted average effect of dilutive securities:
Weighted average effect of dilutive securities (in shares)									8	0	0
RSAs
Weighted average effect of dilutive securities:
Weighted average effect of dilutive securities (in shares)									7	0	0