Net Income (Loss) Per Share/Unit - Calculation of Basic and Diluted Net Income (Loss) Per Share/Unit (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Numerator—basic and diluted:
Net (loss) income attributable to Switch, Inc.—basic and diluted	$ (66,975)	$ 16,486	$ 14,953	$ 20,328	$ (19,771)	$ 15,926	$ 18,535	$ 16,678	$ (15,208)	$ 31,368	$ 73,472
Denominator—basic:
Weighted average shares/units outstanding—basic (in shares)									8,073,908	199,047,070	196,773,458
Basic net income (loss) per unit/share (in dollars per share)	$ (2.09)	$ 0.08	$ 0.07	$ 0.10	$ (0.10)	$ 0.08	$ 0.09	$ 0.08	$ (1.88)	$ 0.16	$ 0.37
Denominator:
Weighted average shares/units outstanding—basic (in shares)									8,073,908	199,047,070	196,773,458
Weighted average effect of dilutive securities:
Weighted average shares/units outstanding-diluted (in shares)									8,073,908	203,461,420	199,272,269
Diluted net income (loss) per unit/share (in dollars per share)	$ (2.09)	$ 0.08	$ 0.07	$ 0.10	$ (0.10)	$ 0.08	$ 0.09	$ 0.08	$ (1.88)	$ 0.15	$ 0.37
Stock Options
Weighted average effect of dilutive securities:
Effect of dilutive securities (in shares)									0	230,511	1,498,228
Incentive Units
Weighted average effect of dilutive securities:
Effect of dilutive securities (in shares)									0	4,183,839	1,000,583