Segment Reporting - Reportable Operating Segments (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
May 31, 2025	May 31, 2024	May 31, 2025	May 31, 2024
Segment Reporting Information [Line Items]
Total Revenues	$ 17,727,871	$ 16,466,828	$ 52,076,717	$ 48,490,645
Total Operating Income	2,982,782	2,630,865	8,175,973	7,242,179
Consulting
Segment Reporting Information [Line Items]
Total Revenues	9,007,033	8,457,169	26,334,521	24,934,709
Managed Services
Segment Reporting Information [Line Items]
Total Revenues	8,720,838	8,009,659	25,742,196	23,555,936
Communications, Media & Technology
Segment Reporting Information [Line Items]
Total Revenues	2,912,485	2,763,076	8,500,025	8,086,661
Financial Services
Segment Reporting Information [Line Items]
Total Revenues	3,278,891	2,894,753	9,458,156	8,737,261
Health & Public Service
Segment Reporting Information [Line Items]
Total Revenues	3,777,684	3,515,264	11,199,205	10,226,769
Products
Segment Reporting Information [Line Items]
Total Revenues	5,344,109	4,983,422	15,821,265	14,605,247
Resources
Segment Reporting Information [Line Items]
Total Revenues	2,414,702	2,310,313	7,098,066	6,834,707
Americas
Segment Reporting Information [Line Items]
Total Revenues	8,966,131	8,286,527	26,252,324	24,129,042
Total Operating Income	1,719,630	1,407,677	4,337,307	3,783,915
EMEA
Segment Reporting Information [Line Items]
Total Revenues	6,231,849	5,776,624	18,447,676	17,179,116
Total Operating Income	753,093	749,859	2,428,305	2,102,472
Asia Pacific
Segment Reporting Information [Line Items]
Total Revenues	2,529,891	2,403,677	7,376,717	7,182,487
Total Operating Income	$ 510,059	$ 473,329	$ 1,410,361	$ 1,355,792