REVENUE - Performance Obligations (Details) - USD ($) $ in Thousands	Jun. 30, 2023	Jun. 30, 2022
Disaggregation of Revenue [Line Items]
Revenue remaining performance obligation	$ 1,266,096	$ 1,125,694
Revenue remaining performance obligation (in percent)	100.00%	100.00%
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2022-07-01
Disaggregation of Revenue [Line Items]
Revenue remaining performance obligation		$ 610,726
Revenue remaining performance obligation (in percent)		54.00%
Expected timing of satisfaction		1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2023-07-01
Disaggregation of Revenue [Line Items]
Revenue remaining performance obligation	$ 689,712	$ 281,132
Revenue remaining performance obligation (in percent)	55.00%	25.00%
Expected timing of satisfaction	1 year	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2024-07-01
Disaggregation of Revenue [Line Items]
Revenue remaining performance obligation	$ 309,292	$ 132,216
Revenue remaining performance obligation (in percent)	24.00%	12.00%
Expected timing of satisfaction	1 year	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2025-07-01
Disaggregation of Revenue [Line Items]
Revenue remaining performance obligation	$ 158,006	$ 101,620
Revenue remaining performance obligation (in percent)	12.00%	9.00%
Expected timing of satisfaction	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2026-07-01
Disaggregation of Revenue [Line Items]
Revenue remaining performance obligation	$ 109,086
Revenue remaining performance obligation (in percent)	9.00%
Expected timing of satisfaction
Maintenance
Disaggregation of Revenue [Line Items]
Revenue remaining performance obligation	$ 305,825	$ 309,686
Maintenance | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2022-07-01
Disaggregation of Revenue [Line Items]
Revenue remaining performance obligation		204,974
Maintenance | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2023-07-01
Disaggregation of Revenue [Line Items]
Revenue remaining performance obligation	214,579	57,862
Maintenance | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2024-07-01
Disaggregation of Revenue [Line Items]
Revenue remaining performance obligation	58,551	28,403
Maintenance | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2025-07-01
Disaggregation of Revenue [Line Items]
Revenue remaining performance obligation	25,103	18,447
Maintenance | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2026-07-01
Disaggregation of Revenue [Line Items]
Revenue remaining performance obligation	7,592
Pega Cloud
Disaggregation of Revenue [Line Items]
Revenue remaining performance obligation	861,984	698,167
Pega Cloud | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2022-07-01
Disaggregation of Revenue [Line Items]
Revenue remaining performance obligation		320,102
Pega Cloud | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2023-07-01
Disaggregation of Revenue [Line Items]
Revenue remaining performance obligation	397,183	200,135
Pega Cloud | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2024-07-01
Disaggregation of Revenue [Line Items]
Revenue remaining performance obligation	238,691	96,861
Pega Cloud | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2025-07-01
Disaggregation of Revenue [Line Items]
Revenue remaining performance obligation	124,616	81,069
Pega Cloud | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2026-07-01
Disaggregation of Revenue [Line Items]
Revenue remaining performance obligation	101,494
Subscription license
Disaggregation of Revenue [Line Items]
Revenue remaining performance obligation	45,406	61,327
Subscription license | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2022-07-01
Disaggregation of Revenue [Line Items]
Revenue remaining performance obligation		46,810
Subscription license | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2023-07-01
Disaggregation of Revenue [Line Items]
Revenue remaining performance obligation	35,616	10,711
Subscription license | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2024-07-01
Disaggregation of Revenue [Line Items]
Revenue remaining performance obligation	3,026	2,126
Subscription license | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2025-07-01
Disaggregation of Revenue [Line Items]
Revenue remaining performance obligation	6,764	1,680
Subscription license | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2026-07-01
Disaggregation of Revenue [Line Items]
Revenue remaining performance obligation	0
Perpetual license
Disaggregation of Revenue [Line Items]
Revenue remaining performance obligation	7,231	13,438
Perpetual license | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2022-07-01
Disaggregation of Revenue [Line Items]
Revenue remaining performance obligation		6,681
Perpetual license | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2023-07-01
Disaggregation of Revenue [Line Items]
Revenue remaining performance obligation	4,979	4,505
Perpetual license | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2024-07-01
Disaggregation of Revenue [Line Items]
Revenue remaining performance obligation	2,252	2,252
Perpetual license | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2025-07-01
Disaggregation of Revenue [Line Items]
Revenue remaining performance obligation	0	0
Perpetual license | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2026-07-01
Disaggregation of Revenue [Line Items]
Revenue remaining performance obligation	0
Consulting
Disaggregation of Revenue [Line Items]
Revenue remaining performance obligation	45,650	43,076
Consulting | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2022-07-01
Disaggregation of Revenue [Line Items]
Revenue remaining performance obligation		32,159
Consulting | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2023-07-01
Disaggregation of Revenue [Line Items]
Revenue remaining performance obligation	37,355	7,919
Consulting | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2024-07-01
Disaggregation of Revenue [Line Items]
Revenue remaining performance obligation	6,772	2,574
Consulting | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2025-07-01
Disaggregation of Revenue [Line Items]
Revenue remaining performance obligation	1,523	$ 424
Consulting | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2026-07-01
Disaggregation of Revenue [Line Items]
Revenue remaining performance obligation	$ 0