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Condensed Consolidating Financial Information - Cash Flows (Details) - USD ($) $ in Thousands | 12 Months Ended
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Sep. 30, 2019 | Sep. 30, 2018 | Sep. 30, 2017
Condensed Consolidating Statements of Cash Flows |  |  |
CASH FLOWS FROM OPERATING ACTIVITIES | $ 777,616 | $ 774,553 | $ 696,654
CASH FLOWS FROM INVESTING ACTIVITIES: |  |  |
Proceeds from purchase price adjustment to business acquisition |  | 2,203 |
Cash acquired from consolidation of joint venture |  | 7,630 |
Proceeds from disposal of businesses, net of cash disposed | 46,490 | 19,537 | 2,200
Payment for business acquisitions, net of cash acquired |  |  | 103,075
Net cash used in investing activities | (146,760) | (59,087) | (202,711)
CASH FLOWS FROM FINANCING ACTIVITIES: |  |  |
Proceeds from borrowings under credit agreements | 7,700,774 | 8,529,014 | 5,953,249
Repayments of borrowings under credit agreements | (7,984,624) | (8,040,262) | (7,071,602)
Issuance of unsecured senior notes |  |  | 1,000,000
Cash paid for debt issuance costs |  | (12,181) | (13,041)
Redemption of unsecured senior notes |  | (800,000) | (179,208)
Prepayment penalty on unsecured senior notes |  | (34,504) |
Proceeds from issuance of common stock | 30,448 | 35,233 | 30,093
Proceeds from exercise of stock options |  | 2,750 | 4,878
Payments to repurchase common stock | (98,208) | (179,466) | (25,078)
Net distributions to noncontrolling interests | (69,988) | (89,781) | (59,036)
Other financing activities | (11,681) | (35,671) | (26,745)
Net cash used in financing activities | (433,279) | (624,868) | (386,490)
EFFECT OF EXCHANGE RATE CHANGES ON CASH | (3,956) | (6,227) | 2,764
NET INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS | 193,621 | 84,371 | 110,217
CASH AND CASH EQUIVALENTS AT BEGINNING OF YEAR | 886,733 | 802,362 | 692,145
CASH AND CASH EQUIVALENTS AT END OF YEAR | 1,080,354 | 886,733 | 802,362
Eliminations |  |  |
CASH FLOWS FROM INVESTING ACTIVITIES: |  |  |
Net (investment in) receipts from intercompany notes | 27,200 | 838,700 | (110,400)
Other intercompany investing activities | 502,900 | (1,550,300) | 94,200
Net cash used in investing activities | (475,700) | (711,600) | (16,200)
CASH FLOWS FROM FINANCING ACTIVITIES: |  |  |
Net borrowings (repayments) on intercompany notes | (27,200) | (838,700) | 110,400
Other intercompany financing activities | (502,900) | 1,550,300 | (94,200)
Net cash used in financing activities | 475,700 | 711,600 | 16,200
Parent | Reportable Legal Entities |  |  |
Condensed Consolidating Statements of Cash Flows |  |  |
CASH FLOWS FROM OPERATING ACTIVITIES | (16,700) | (205,500) | (5,900)
CASH FLOWS FROM INVESTING ACTIVITIES: |  |  |
Proceeds from disposal of businesses, net of cash disposed | 11,700 |  |
Net investment in unconsolidated joint ventures | (4,200) | (6,100) |
Payments for capital expenditures, net of disposals | (32,900) | (29,300) | (21,700)
Net (investment in) receipts from intercompany notes | 54,900 | (54,300) | (4,600)
Other intercompany investing activities | (291,900) | 528,200 | 139,000
Net cash used in investing activities | 321,400 | 438,500 | 112,700
CASH FLOWS FROM FINANCING ACTIVITIES: |  |  |
Proceeds from borrowings under credit agreements | 7,524,000 | 7,770,400 | 5,903,500
Repayments of borrowings under credit agreements | (7,734,100) | (7,820,000) | (6,956,300)
Cash paid for debt issuance costs |  |  | 1,000,000
Redemption of unsecured senior notes |  | (800,000) |
Prepayment penalty on unsecured senior notes |  | (34,500) |
Cash paid for debt issuance costs |  | (12,200) | (13,000)
Proceeds from issuance of common stock | 30,400 | 35,200 | 30,100
Proceeds from exercise of stock options |  | 2,800 | 4,900
Payments to repurchase common stock | (98,200) |  | (25,100)
Payments to repurchase common stock |  | (179,500) |
Other financing activities | 4,800 | (3,600) | (24,100)
Net borrowings (repayments) on intercompany notes | 75,700 | 797,800 | 4,000
Net cash used in financing activities | (197,400) | (243,600) | (76,000)
NET INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS | 107,300 | (10,600) | 30,800
CASH AND CASH EQUIVALENTS AT BEGINNING OF YEAR | 22,000 | 32,600 | 1,800
CASH AND CASH EQUIVALENTS AT END OF YEAR | 129,300 | 22,000 | 32,600
Guarantor Subsidiaries | Reportable Legal Entities |  |  |
Condensed Consolidating Statements of Cash Flows |  |  |
CASH FLOWS FROM OPERATING ACTIVITIES | 572,700 | 640,900 | 695,000
CASH FLOWS FROM INVESTING ACTIVITIES: |  |  |
Proceeds from disposal of businesses, net of cash disposed | (3,000) |  |
Net investment in unconsolidated joint ventures | (25,800) | (9,100) | (2,700)
Payments for capital expenditures, net of disposals | (24,300) | (39,100) | (30,600)
Net (investment in) receipts from intercompany notes | (52,400) | (778,800) | 102,800
Other intercompany investing activities | (211,000) | 1,022,100 | (233,200)
Net cash used in investing activities | 105,500 | 195,100 | (163,700)
CASH FLOWS FROM FINANCING ACTIVITIES: |  |  |
Proceeds from borrowings under credit agreements |  | 200 | 13,100
Repayments of borrowings under credit agreements | (28,600) | (18,000) | (51,100)
Redemption of unsecured senior notes |  |  | (179,200)
Other financing activities | (800) | (22,400) | (38,300)
Net borrowings (repayments) on intercompany notes | 26,400 | 5,900 | (16,300)
Other intercompany financing activities | 630,500 | (785,700) | (200,900)
Net cash used in financing activities | (633,500) | (820,000) | (472,700)
NET INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS | 44,700 | 16,000 | 58,600
CASH AND CASH EQUIVALENTS AT BEGINNING OF YEAR | 270,900 | 254,900 | 196,300
CASH AND CASH EQUIVALENTS AT END OF YEAR | 315,600 | 270,900 | 254,900
Non-Guarantor Subsidiaries | Reportable Legal Entities |  |  |
Condensed Consolidating Statements of Cash Flows |  |  |
CASH FLOWS FROM OPERATING ACTIVITIES | 221,600 | 339,100 | 7,600
CASH FLOWS FROM INVESTING ACTIVITIES: |  |  |
Proceeds from purchase price adjustment to business acquisition |  | 2,200 |
Cash acquired from consolidation of joint venture |  | 7,600 |
Proceeds from disposal of businesses, net of cash disposed | 37,800 | 19,500 | 2,200
Net investment in unconsolidated joint ventures | (89,000) | 30,000 | (21,600)
Net proceeds from sale of investment securities | 9,100 |  |
Net purchases of investments |  | (16,300) | 900
Payments for capital expenditures, net of disposals | (26,200) | (18,500) | (26,100)
Net (investment in) receipts from intercompany notes | (29,700) | (5,600) | 12,200
Payment for business acquisitions, net of cash acquired |  |  | 103,100
Net cash used in investing activities | (98,000) | 18,900 | (135,500)
CASH FLOWS FROM FINANCING ACTIVITIES: |  |  |
Proceeds from borrowings under credit agreements | 176,800 | 758,400 | 36,600
Repayments of borrowings under credit agreements | (221,900) | (202,200) | (64,200)
Net distributions to noncontrolling interests | (70,000) | (89,800) | (59,000)
Other financing activities | (15,700) | (9,700) | 35,600
Net borrowings (repayments) on intercompany notes | (74,900) | 35,000 | (98,100)
Other intercompany financing activities | (127,600) | (764,600) | 295,100
Net cash used in financing activities | (78,100) | (272,900) | 146,000
EFFECT OF EXCHANGE RATE CHANGES ON CASH | (3,800) | (6,200) | 2,800
NET INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS | 41,700 | 78,900 | 20,900
CASH AND CASH EQUIVALENTS AT BEGINNING OF YEAR | 593,800 | 514,900 | 494,000
CASH AND CASH EQUIVALENTS AT END OF YEAR | 635,500 | 593,800 | 514,900
Total |  |  |
Condensed Consolidating Statements of Cash Flows |  |  |
CASH FLOWS FROM OPERATING ACTIVITIES | 777,600 | 774,500 | 696,700
CASH FLOWS FROM INVESTING ACTIVITIES: |  |  |
Proceeds from purchase price adjustment to business acquisition |  | 2,200 |
Cash acquired from consolidation of joint venture |  | 7,600 |
Proceeds from disposal of businesses, net of cash disposed | 46,500 | 19,500 | 2,200
Net investment in unconsolidated joint ventures | (119,000) | 14,800 | (24,300)
Net proceeds from sale of investment securities | 9,100 |  |
Net purchases of investments |  | (16,300) | 900
Payments for capital expenditures, net of disposals | (83,400) | (86,900) | (78,400)
Payment for business acquisitions, net of cash acquired |  |  | 103,100
Net cash used in investing activities | (146,800) | (59,100) | (202,700)
CASH FLOWS FROM FINANCING ACTIVITIES: |  |  |
Proceeds from borrowings under credit agreements | 7,700,800 | 8,529,000 | 5,953,200
Repayments of borrowings under credit agreements | (7,984,600) | (8,040,200) | (7,071,600)
Issuance of unsecured senior notes |  |  | 1,000,000
Redemption of unsecured senior notes |  | (800,000) | (179,200)
Prepayment penalty on unsecured senior notes |  | (34,500) |
Cash paid for debt issuance costs |  | (12,200) | (13,000)
Proceeds from issuance of common stock | 30,400 | 35,200 | 30,100
Proceeds from exercise of stock options |  | 2,800 | 4,900
Payments to repurchase common stock | (98,200) |  | (25,100)
Payments to repurchase common stock |  | (179,500) |
Net distributions to noncontrolling interests | (70,000) | (89,800) | (59,000)
Other financing activities | (11,700) | (35,700) | (26,800)
Net cash used in financing activities | (433,300) | (624,900) | (386,500)
EFFECT OF EXCHANGE RATE CHANGES ON CASH | (3,800) | (6,200) | 2,800
NET INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS | 193,700 | 84,300 | 110,300
CASH AND CASH EQUIVALENTS AT BEGINNING OF YEAR | 886,700 | 802,400 | 692,100
CASH AND CASH EQUIVALENTS AT END OF YEAR | $ 1,080,400 | $ 886,700 | $ 802,400

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