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Summary of Significant Accounting Policies - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Dec. 31, 2019	Jan. 01, 2020
Schedule Of Significant Accounting Policies [Line Items]
Decrease in accounts receivable due to incremental allowance for credit losses	$ (910,955)		$ (914,255)
Increase in deferred tax assets	102,078		89,715
Decrease in retained earnings	(666,816)		$ (648,656)
ASC 326
Schedule Of Significant Accounting Policies [Line Items]
Decrease in accounts receivable due to incremental allowance for credit losses				$ (910,070)
Decrease in deferred billings, due to incremental allowance for credit losses	$ (734)
Increase in deferred tax assets				90,650
Decrease in retained earnings				(644,672)
ASC 326 | Adoption of Topic 326 Increase/(Decrease)
Schedule Of Significant Accounting Policies [Line Items]
Decrease in accounts receivable due to incremental allowance for credit losses				4,185
Decrease in deferred billings, due to incremental allowance for credit losses				734
Increase in deferred tax assets				935
Decrease in retained earnings				$ 3,984
Minimum
Schedule Of Significant Accounting Policies [Line Items]
Additional terms of renewal option	1 year
Additional terms of termination option	1 year
Maximum
Schedule Of Significant Accounting Policies [Line Items]
Additional terms of renewal option	5 years
Additional terms of termination option	5 years
General Electric Company | Credit Concentration Risk | Receivables
Schedule Of Significant Accounting Policies [Line Items]
Concentration risk, percentage	18.00%		17.00%
General Electric Company | Credit Concentration Risk | Revenue From Contract With Customer
Schedule Of Significant Accounting Policies [Line Items]
Concentration risk, percentage	13.00%	13.00%

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