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Condensed Consolidating Financial Information - Cash Flows (Details) - USD ($) $ in Thousands | 12 Months Ended
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Sep. 30, 2016 | Sep. 30, 2015 | Sep. 30, 2014
Condensed Consolidating Statements of Cash Flows |  |  |
CASH FLOWS FROM OPERATING ACTIVITIES | $ 814,155 | $ 764,433 | $ 360,625
CASH FLOWS FROM INVESTING ACTIVITIES: |  |  |
Payments for business acquisitions, net of cash acquired | (5,534) | (3,293,284) | (53,099)
Cash acquired from consolidation of joint venture |  |  | 18,955
Proceeds from disposal of businesses and property | 39,699 | 15,127 | 3,646
Net investment in unconsolidated joint ventures | (71,547) | (32,705) | (52,173)
Sales (purchases) of investments | 11,500 | 34,600 | 2,700
Payments for capital expenditures, net of disposals | (136,800) | (69,400) | (62,800)
Net cash used in investing activities | (162,615) | (3,345,728) | (142,796)
CASH FLOWS FROM FINANCING ACTIVITIES: |  |  |
Proceeds from borrowings under credit agreements | 4,706,225 | 6,581,703 | 1,809,187
Repayments of borrowings under credit agreements | (5,199,961) | (5,158,254) | (1,976,352)
Issuance of unsecured senior notes |  | 1,600,000 |
Prepayment penalty on Unsecured Senior Notes |  | (55,639) |
Cash paid for debt and equity issuance costs | (10,447) | (89,567) | (8,067)
Proceeds from issuance of common stock | 28,192 | 25,561 | 13,886
Proceeds from exercise of stock options | 9,946 | 11,073 | 13,417
Payments to repurchase common stock | (25,892) | (23,113) | (34,924)
Excess tax benefit from share-based payment |  | 3,642 | 748
Net distributions to noncontrolling interests | (103,169) | (144,269) | (30,253)
Other financing activities | (42,873) | (31,373) | (21,399)
Net cash (used in) provided by financing activities | (637,979) | 2,719,764 | (233,757)
EFFECT OF EXCHANGE RATE CHANGES ON CASH | (5,309) | (28,764) | (10,561)
NET INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS | 8,252 | 109,705 | (26,489)
CASH AND CASH EQUIVALENTS AT BEGINNING OF YEAR | 683,893 | 574,188 | 600,677
CASH AND CASH EQUIVALENTS AT END OF YEAR | 692,145 | 683,893 | 574,188
Reportable Legal Entities | Parent |  |  |
Condensed Consolidating Statements of Cash Flows |  |  |
CASH FLOWS FROM OPERATING ACTIVITIES | (273,600) | (551,200) | (33,300)
CASH FLOWS FROM INVESTING ACTIVITIES: |  |  |
Payments for business acquisitions, net of cash acquired |  | (3,564,200) |
Proceeds from disposal of businesses and property |  | 9,500 |
Sales (purchases) of investments |  | 37,300 |
Payments for capital expenditures, net of disposals | (82,000) | (51,900) | (14,300)
Net receipts from (investment in) intercompany notes | 5,300 | 95,600 | 146,700
Other intercompany investing activities | 791,200 | 1,085,800 | 116,700
Net cash used in investing activities | 714,500 | (2,387,900) | 249,100
CASH FLOWS FROM FINANCING ACTIVITIES: |  |  |
Proceeds from borrowings under credit agreements | 4,673,000 | 6,464,600 | 1,769,300
Repayments of borrowings under credit agreements | (5,124,100) | (5,031,900) | (1,918,600)
Issuance of unsecured senior notes |  | 1,600,000 |
Prepayment penalty on Unsecured Senior Notes |  | (55,600) |
Cash paid for debt and equity issuance costs | (10,400) | (89,600) | (8,100)
Proceeds from issuance of common stock | 28,200 | 25,600 | 13,900
Proceeds from exercise of stock options | 9,900 | 11,100 | 13,400
Payments to repurchase common stock | (25,900) | (23,100) | (34,900)
Excess tax benefit from share-based payment |  | 3,600 | 700
Other financing activities | 7,900 | 2,300 | (22,500)
Net borrowings (repayments) on intercompany notes | 1,000 |  |
Net cash (used in) provided by financing activities | (440,400) | 2,907,000 | (186,800)
NET INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS | 500 | (32,100) | 29,000
CASH AND CASH EQUIVALENTS AT BEGINNING OF YEAR | 1,300 | 33,400 | 4,400
CASH AND CASH EQUIVALENTS AT END OF YEAR | 1,800 | 1,300 | 33,400
Reportable Legal Entities | Guarantor Subsidiaries |  |  |
Condensed Consolidating Statements of Cash Flows |  |  |
CASH FLOWS FROM OPERATING ACTIVITIES | 623,700 | 816,900 | 206,500
CASH FLOWS FROM INVESTING ACTIVITIES: |  |  |
Payments for business acquisitions, net of cash acquired | (1,000) | 109,200 | (55,000)
Proceeds from disposal of businesses and property |  | 5,600 |
Net investment in unconsolidated joint ventures | (3,900) | (4,000) | 9,400
Payments for capital expenditures, net of disposals | (58,700) | (15,800) | (17,800)
Net receipts from (investment in) intercompany notes | 176,100 | 128,600 |
Other intercompany investing activities | 140,300 | 160,900 | 55,700
Net cash used in investing activities | 252,800 | 384,500 | (7,700)
CASH FLOWS FROM FINANCING ACTIVITIES: |  |  |
Proceeds from borrowings under credit agreements | 17,600 | 29,900 |
Repayments of borrowings under credit agreements | (22,800) | (31,200) | (15,800)
Other financing activities | (4,500) | (4,100) | 800
Net borrowings (repayments) on intercompany notes | 12,500 |  |
Other intercompany financing activities | (858,100) | (1,119,300) | (178,200)
Net cash (used in) provided by financing activities | (855,300) | (1,124,700) | (193,200)
NET INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS | 21,200 | 76,700 | 5,600
CASH AND CASH EQUIVALENTS AT BEGINNING OF YEAR | 162,500 | 85,800 | 80,200
CASH AND CASH EQUIVALENTS AT END OF YEAR | 183,700 | 162,500 | 85,800
Reportable Legal Entities | Non-Guarantor Subsidiaries |  |  |
Condensed Consolidating Statements of Cash Flows |  |  |
CASH FLOWS FROM OPERATING ACTIVITIES | 464,100 | 498,700 | 187,400
CASH FLOWS FROM INVESTING ACTIVITIES: |  |  |
Payments for business acquisitions, net of cash acquired | (4,500) | 161,700 | 1,900
Cash acquired from consolidation of joint venture |  |  | 19,000
Proceeds from disposal of businesses and property | 39,700 |  | 3,600
Net investment in unconsolidated joint ventures | (67,600) | (28,700) | (61,600)
Sales (purchases) of investments | 11,500 | (2,700) | 2,700
Payments for capital expenditures, net of disposals | 3,900 | (1,700) | (30,700)
Net receipts from (investment in) intercompany notes | (13,500) |  |
Net cash used in investing activities | (30,500) | 128,600 | (65,100)
CASH FLOWS FROM FINANCING ACTIVITIES: |  |  |
Proceeds from borrowings under credit agreements | 15,600 | 87,200 | 39,900
Repayments of borrowings under credit agreements | (53,100) | (95,200) | (42,000)
Net distributions to noncontrolling interests | (103,200) | (144,300) | (30,200)
Other financing activities | (46,300) | (29,500) | 300
Net borrowings (repayments) on intercompany notes | (181,400) | (224,200) | (146,700)
Other intercompany financing activities | (73,400) | (127,400) | 5,800
Net cash (used in) provided by financing activities | (441,800) | (533,400) | (172,900)
EFFECT OF EXCHANGE RATE CHANGES ON CASH | (5,300) | (28,800) | (10,500)
NET INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS | (13,500) | 65,100 | (61,100)
CASH AND CASH EQUIVALENTS AT BEGINNING OF YEAR | 520,100 | 455,000 | 516,100
CASH AND CASH EQUIVALENTS AT END OF YEAR | 506,600 | 520,100 | 455,000
Eliminations |  |  |
CASH FLOWS FROM INVESTING ACTIVITIES: |  |  |
Net receipts from (investment in) intercompany notes | (167,900) | (224,200) | (146,700)
Other intercompany investing activities | (931,500) | (1,246,700) | (172,400)
Net cash used in investing activities | (1,099,400) | (1,470,900) | (319,100)
CASH FLOWS FROM FINANCING ACTIVITIES: |  |  |
Net borrowings (repayments) on intercompany notes | 167,900 | 224,200 | 146,700
Other intercompany financing activities | 931,500 | 1,246,700 | 172,400
Net cash (used in) provided by financing activities | $ 1,099,400 | $ 1,470,900 | $ 319,100

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