Summary of Significant Accounting Policies - Summary of the Effects of Adopting ASC 606 on the Consolidated Financial Statements (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended									9 Months Ended	12 Months Ended
	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Oct. 10, 2017	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Jan. 01, 2019
Balance Sheets
Other current assets	$ 3,817				$ 2,332						$ 3,817	$ 2,332		$ 3,272
Total current assets	59,040				108,327						59,040	108,327
Deferred income taxes	114,372				28,550						114,372	28,550		28,497
Other assets	45,785				17,050						45,785	17,050		14,673
Total assets	1,773,743				1,460,030						1,773,743	1,460,030
Deferred revenue, current portion	14,991				12,322						14,991	12,322
Deferred revenue, current portion					10,800							10,800		12,322
Total current liabilities	113,930				75,028						113,930	75,028
Deferred revenue	27,852				22,260						27,852	22,260		18,084
Total liabilities	1,146,098				751,678						1,146,098	751,678
Retained earnings	2,420				2,693						2,420	2,693		2,917
Balance Sheets	207,451				143,210						207,451	143,210
Noncontrolling interest	420,194				565,142						420,194	565,142		566,082
Total stockholders’ equity	627,645				708,352				$ 742,133		627,645	708,352	$ 742,133
Total liabilities and stockholders’ equity	1,773,743				1,460,030						1,773,743	1,460,030
Statements of Comprehensive Income (Loss)
Revenue	120,545	$ 122,353	$ 111,970	$ 107,442	103,214	$ 102,768	$ 102,161	$ 97,717			462,310	405,860	378,275
Cost of revenue											242,679	224,413	198,230
Gross profit	57,012	58,849	53,853	49,917	48,001	43,618	46,967	42,861			219,631	181,447	180,045
Income from operations											76,927	54,679	18,827
Income before income taxes											34,255	31,261	(9,561)
Deferred income taxes											2,713	1,943	(981)
Net income	12,944	10,080	4,672	3,846	11,166	4,663	9,539	3,950	8,733	$ (17,313)	31,542	29,318	(8,580)
Less: net income attributable to noncontrolling interest											22,625	25,266	6,628
Net income (loss) attributable to Switch, Inc.—basic	$ 4,048	$ 2,947	$ 1,189	$ 733	$ 2,554	$ 6	$ 821	$ 671			$ 8,917	$ 4,052	$ (15,208)
Basic net income per share (in dollars per share)	$ 0.05	$ 0.04	$ 0.02	$ 0.01	$ 0.05	$ 0.00	$ 0.02	$ 0.02			$ 0.12	$ 0.09	$ (1.88)
Diluted net income per share (in dollars per share)	$ 0.04	$ 0.03	$ 0.02	$ 0.01	$ 0.05	$ 0.00	$ 0.02	$ 0.02			$ 0.11	$ 0.09	$ (1.88)
Statements of Cash Flows
Net income (loss)	$ 12,944	$ 10,080	$ 4,672	$ 3,846	$ 11,166	$ 4,663	$ 9,539	$ 3,950	$ 8,733	$ (17,313)	$ 31,542	$ 29,318	$ (8,580)
Deferred income taxes											2,713	1,943	(981)
Other current assets											(545)	(231)	(261)
Other assets											3,447	(5,353)	(1,221)
Deferred revenue											12,437	2,196	6,006
Net cash provided by operating activities											209,413	$ 178,330	$ 146,601
ASU 2014-09
Balance Sheets
Other current assets														940
Deferred income taxes														(53)
Other assets														(2,377)
Deferred revenue, current portion														1,522
Deferred revenue														(4,176)
Retained earnings														224
Noncontrolling interest														$ 940
Adjustment Due to Adoption of ASC 606 | ASU 2014-09
Balance Sheets
Other current assets	(887)										(887)
Total current assets	(887)										(887)
Deferred income taxes	97										97
Other assets	3,390										3,390
Total assets	2,600										2,600
Deferred revenue, current portion	(1,545)										(1,545)
Total current liabilities	(1,545)										(1,545)
Deferred revenue	6,097										6,097
Total liabilities	4,552										4,552
Retained earnings	(451)										(451)
Balance Sheets	(451)										(451)
Noncontrolling interest	(1,501)										(1,501)
Total stockholders’ equity	(1,952)										(1,952)
Total liabilities and stockholders’ equity	2,600										2,600
Statements of Comprehensive Income (Loss)
Revenue											(1,898)
Cost of revenue											(1,066)
Gross profit											(832)
Income from operations											(832)
Income before income taxes											(832)
Deferred income taxes											(44)
Net income											(788)
Less: net income attributable to noncontrolling interest											(561)
Net income (loss) attributable to Switch, Inc.—basic											$ (227)
Basic net income per share (in dollars per share)											$ 0.00
Diluted net income per share (in dollars per share)											$ 0.00
Statements of Cash Flows
Net income (loss)											$ (788)
Deferred income taxes											(44)
Other current assets											(53)
Other assets											(1,013)
Deferred revenue											1,898
Net cash provided by operating activities											0
As If Presented Under Prior Standard
Balance Sheets
Other current assets	2,930										2,930
Total current assets	58,153										58,153
Deferred income taxes	114,469										114,469
Other assets	49,175										49,175
Total assets	1,776,343										1,776,343
Deferred revenue, current portion	13,446										13,446
Total current liabilities	112,385										112,385
Deferred revenue	33,949										33,949
Total liabilities	1,150,650										1,150,650
Retained earnings	1,969										1,969
Balance Sheets	207,000										207,000
Noncontrolling interest	418,693										418,693
Total stockholders’ equity	625,693										625,693
Total liabilities and stockholders’ equity	$ 1,776,343										1,776,343
Statements of Comprehensive Income (Loss)
Revenue											460,412
Cost of revenue											241,613
Gross profit											218,799
Income from operations											76,095
Income before income taxes											33,423
Deferred income taxes											2,669
Net income											30,754
Less: net income attributable to noncontrolling interest											22,064
Net income (loss) attributable to Switch, Inc.—basic											$ 8,690
Basic net income per share (in dollars per share)											$ 0.12
Diluted net income per share (in dollars per share)											$ 0.11
Statements of Cash Flows
Net income (loss)											$ 30,754
Deferred income taxes											2,669
Other current assets											(598)
Other assets											2,434
Deferred revenue											14,335
Net cash provided by operating activities											$ 209,413