Condensed Consolidating Financial Statements of Guarantors (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013	Mar. 31, 2014	Sep. 30, 2013	Mar. 31, 2013	Sep. 30, 2012
Condensed Consolidating Financial Statements of Guarantors
Ownership percentage in subsidiary	100.00%		100.00%
Current Assets
Other current assets	$ 78,846		$ 78,846			$ 78,579
Total current assets	1,254,934		1,254,934			1,212,399
Other assets	64,521		64,521			68,235
Total assets	5,125,779		5,125,779			5,073,316
Current liabilities:
Total current liabilities	455,807		455,807			479,202
Deferred income taxes	747,900		747,900			751,419
Total liabilities	3,435,557		3,435,557			3,448,477
Stockholder's equity:
Capital in excess of par	1,560,298		1,560,298			1,556,926
Retained earnings	118,422		118,422			81,497
Accumulated other comprehensive income (loss)	11,502	(60,393)	11,502	(60,393)	(324)	(13,584)	(58,697)	(18,594)
Total stockholder's equity	1,690,222		1,690,222			1,624,839
Total liabilities and stockholder's equity	5,125,779		5,125,779			5,073,316
Consolidated Statements of Operations and Comprehensive Income (Loss)
Selling, general and administrative	235,538	224,422	707,115	675,388
Income (loss) from operations	79,288	100,443	243,738	229,057
Miscellaneous, net	2,534	3,824	1,809	4,284
Total other income (expense)	(31,260)	(30,240)	(99,889)	(108,465)
Income (loss) before income taxes	48,028	70,203	143,849	120,592
Provision (benefit) for income taxes	14,761	18,953	46,861	34,575
Net income (loss)	33,267	51,250	96,988	86,017
Foreign currency translation adjustment, net of taxes	11,127	(2,857)	22,615	(45,221)
Change in fair value of interest rate swaps, net of taxes	699	1,161	2,469	3,422
Comprehensive income (loss)	45,093	49,554	122,072	44,218
Statements of cash flows
Cash (used in) provided by operating activities			27,017	213,035
Cash paid for acquisitions, net of cash acquired				(82,472)
Cash used in investing activities			(72,436)	(171,778)
Dividends paid			(60,063)	(216,926)
Cash used in financing activities			(60,361)	(224,755)
Parent Company | As Reported
Current Assets
Intercompany						857,700
Total current assets						939,000
Intercompany						323,300
Investments in subsidiaries						3,211,100
Total assets						4,562,000
Current liabilities:
Total current liabilities						38,400
Deferred income taxes						721,800
Total liabilities						2,937,200
Stockholder's equity:
Capital in excess of par						1,556,900
Retained earnings						81,500
Accumulated other comprehensive income (loss)						(13,600)
Total stockholder's equity						1,624,800
Total liabilities and stockholder's equity						4,562,000
Consolidated Statements of Operations and Comprehensive Income (Loss)
Selling, general and administrative		22,300		78,800
Income (loss) from operations		(22,300)		(78,800)
Intercompany interest		4,700		9,600
Miscellaneous, net				(200)
Total other income (expense)		(34,100)		(103,600)
Income (loss) before income taxes		(51,800)		(182,500)
Provision (benefit) for income taxes		(20,500)		(62,100)
Equity in income of subsidiaries		82,600		206,400
Net income (loss)		51,300		86,000
Foreign currency translation adjustment, net of taxes				(58,000)
Change in fair value of interest rate swaps, net of taxes		(3,700)		16,200
Comprehensive income (loss)		49,600		44,200
Statements of cash flows
Cash (used in) provided by operating activities				168,400
Cash paid for acquisitions, net of cash acquired				(77,900)
Cash used in investing activities				(106,600)
Dividends paid				(216,900)
Cash used in financing activities				(224,300)
Guarantor Subsidiaries | As Reported
Current Assets
Other current assets						43,100
Total current assets						790,700
Other assets						68,200
Total assets						3,583,300
Current liabilities:
Intercompany						1,121,800
Total current liabilities						1,424,300
Deferred income taxes						22,000
Total liabilities						1,464,000
Stockholder's equity:
Capital in excess of par						352,000
Retained earnings						1,767,300
Total stockholder's equity						2,119,300
Total liabilities and stockholder's equity						3,583,300
Consolidated Statements of Operations and Comprehensive Income (Loss)
Selling, general and administrative		114,200		338,100
Income (loss) from operations		70,200		162,000
Miscellaneous, net		5,100		8,000
Total other income (expense)		5,100		8,000
Income (loss) before income taxes		75,300		170,000
Provision (benefit) for income taxes		26,300		59,500
Net income (loss)		48,900		110,500
Comprehensive income (loss)		48,900		110,500
Statements of cash flows
Cash (used in) provided by operating activities				29,100
Cash paid for acquisitions, net of cash acquired				(4,500)
Cash used in investing activities				(41,600)
Cash used in financing activities				(400)
Non-Guarantor Subsidiaries | As Reported
Current Assets
Intercompany						264,100
Other current assets						35,400
Total current assets						604,400
Other assets						100
Total assets						1,584,100
Current liabilities:
Total current liabilities						135,200
Intercompany						323,300
Deferred income taxes						7,500
Total liabilities						492,300
Stockholder's equity:
Capital in excess of par						301,300
Retained earnings						789,300
Accumulated other comprehensive income (loss)						1,200
Total stockholder's equity						1,091,800
Total liabilities and stockholder's equity						1,584,100
Consolidated Statements of Operations and Comprehensive Income (Loss)
Selling, general and administrative		87,900		258,400
Income (loss) from operations		52,600		145,900
Intercompany interest		(4,700)		(9,600)
Miscellaneous, net		(1,300)		(3,500)
Total other income (expense)		(5,900)		(12,800)
Income (loss) before income taxes		46,700		133,100
Provision (benefit) for income taxes		13,100		37,300
Net income (loss)		33,600		95,800
Foreign currency translation adjustment, net of taxes		(2,900)		(35,400)
Comprehensive income (loss)		30,700		60,400
Statements of cash flows
Cash (used in) provided by operating activities				15,500
Cash used in investing activities				(23,600)
Reportable Legal Entities | Parent Company
Current Assets
Intercompany	16,957		16,957			34,549
Other current assets	19,703		19,703			19,033
Total current assets	60,395		60,395			134,938
Other assets	46,348		46,348			61,218
Intercompany	2,503,720		2,503,720			2,480,760
Investments in subsidiaries	2,339,036		2,339,036			2,180,814
Total assets	5,040,322		5,040,322			4,946,342
Current liabilities:
Total current liabilities	21,755		21,755			38,407
Intercompany	1,130,845		1,130,845			1,091,982
Deferred income taxes	8,875		8,875			14,151
Total liabilities	3,350,100		3,350,100			3,321,503
Stockholder's equity:
Capital in excess of par	1,560,298		1,560,298			1,556,926
Retained earnings	118,422		118,422			81,497
Accumulated other comprehensive income (loss)	11,502		11,502			(13,584)
Total stockholder's equity	1,690,222		1,690,222			1,624,839
Total liabilities and stockholder's equity	5,040,322		5,040,322			4,946,342
Consolidated Statements of Operations and Comprehensive Income (Loss)
Selling, general and administrative	22,441	22,320	72,527	78,838
Income (loss) from operations	(22,441)	(22,320)	(72,527)	(78,838)
Intercompany interest	39,222	38,825	118,051	122,628
Miscellaneous, net	1,538	2,045	2,543	1,182
Total other income (expense)	6,593	6,728	17,424	10,777
Income (loss) before income taxes	(15,848)	(15,592)	(55,103)	(68,061)
Provision (benefit) for income taxes	(2,344)	(7,805)	(7,662)	(22,136)
Equity in income of subsidiaries	46,771	59,037	144,429	131,942
Net income (loss)	33,267	51,250	96,988	86,017
Foreign currency translation adjustment, net of taxes	11,127	(2,857)	22,615	(45,221)
Change in fair value of interest rate swaps, net of taxes	699	1,161	2,469	3,422
Comprehensive income (loss)	45,093	49,554	122,072	44,218
Statements of cash flows
Cash (used in) provided by operating activities			(36,434)	13,906
Cash paid for acquisitions, net of cash acquired				(77,936)
Cash used in investing activities			(24,479)	(106,560)
Dividends paid			(60,063)	(216,926)
Cash used in financing activities			3,292	(69,777)
Reportable Legal Entities | Guarantor Subsidiaries
Current Assets
Other current assets	23,270		23,270			24,104
Total current assets	847,533		847,533			771,635
Other assets	18,083		18,083			6,938
Intercompany	1,130,845		1,130,845			1,062,900
Total assets	4,685,489		4,685,489			4,565,976
Current liabilities:
Intercompany	101,106		101,106			34,549
Total current liabilities	423,015		423,015			340,126
Intercompany	2,157,500		2,157,500			2,157,500
Deferred income taxes	639,285		639,285			637,726
Total liabilities	3,235,940		3,235,940			3,150,002
Stockholder's equity:
Capital in excess of par	1,211,581		1,211,581			1,211,581
Retained earnings	239,400		239,400			208,295
Accumulated other comprehensive income (loss)	(1,432)		(1,432)			(3,902)
Total stockholder's equity	1,449,549		1,449,549			1,415,974
Total liabilities and stockholder's equity	4,685,489		4,685,489			4,565,976
Consolidated Statements of Operations and Comprehensive Income (Loss)
Selling, general and administrative	112,937	114,205	343,606	338,137
Income (loss) from operations	44,551	70,176	150,144	161,948
Intercompany interest	(34,167)	(34,142)	(103,170)	(113,033)
Miscellaneous, net	586	3,049	(115)	6,640
Total other income (expense)	(33,193)	(31,093)	(102,291)	(106,393)
Income (loss) before income taxes	11,358	39,083	47,853	55,555
Provision (benefit) for income taxes	3,975	13,679	16,748	19,444
Net income (loss)	7,383	25,404	31,105	36,111
Change in fair value of interest rate swaps, net of taxes	699	1,161	2,469	3,422
Comprehensive income (loss)	8,082	26,565	33,574	39,533
Statements of cash flows
Cash (used in) provided by operating activities			58,813	231,056
Cash used in investing activities			(25,615)	(37,062)
Dividends paid				(52,416)
Cash used in financing activities			(68,555)	(206,952)
Reportable Legal Entities | Non-Guarantor Subsidiaries
Current Assets
Intercompany	84,149		84,149
Other current assets	35,873		35,873			35,442
Total current assets	452,768		452,768			340,375
Other assets	90		90			79
Intercompany						29,082
Total assets	1,479,331		1,479,331			1,349,103
Current liabilities:
Total current liabilities	116,799		116,799			135,218
Intercompany	346,220		346,220			323,260
Deferred income taxes	99,740		99,740			99,542
Total liabilities	589,844		589,844			584,263
Stockholder's equity:
Capital in excess of par	739,911		739,911			733,411
Retained earnings	126,679		126,679			30,198
Accumulated other comprehensive income (loss)	22,897		22,897			1,231
Total stockholder's equity	889,487		889,487			764,840
Total liabilities and stockholder's equity	1,479,331		1,479,331			1,349,103
Consolidated Statements of Operations and Comprehensive Income (Loss)
Selling, general and administrative	100,160	87,897	290,982	258,413
Income (loss) from operations	57,178	52,587	166,121	145,947
Intercompany interest	(5,055)	(4,683)	(14,881)	(9,595)
Miscellaneous, net	410	(1,270)	(619)	(3,538)
Total other income (expense)	(4,660)	(5,875)	(15,022)	(12,849)
Income (loss) before income taxes	52,518	46,712	151,099	133,098
Provision (benefit) for income taxes	13,130	13,079	37,775	37,267
Net income (loss)	39,388	33,633	113,324	95,831
Foreign currency translation adjustment, net of taxes	13,238	(2,938)	21,666	(35,403)
Comprehensive income (loss)	52,626	30,695	134,990	60,428
Statements of cash flows
Cash (used in) provided by operating activities			26,137	72,905
Cash paid for acquisitions, net of cash acquired				(4,536)
Cash used in investing activities			(28,842)	(28,156)
Dividends paid			(16,843)	(52,416)
Cash used in financing activities			(5,441)	(52,858)
Eliminations
Current Assets
Intercompany	(101,106)		(101,106)			(34,549)
Total current assets	(105,762)		(105,762)			(34,549)
Intercompany	(3,634,565)		(3,634,565)			(3,572,742)
Investments in subsidiaries	(2,339,036)		(2,339,036)			(2,180,814)
Total assets	(6,079,363)		(6,079,363)			(5,788,105)
Current liabilities:
Intercompany	(101,106)		(101,106)			(34,549)
Total current liabilities	(105,762)		(105,762)			(34,549)
Intercompany	(3,634,565)		(3,634,565)			(3,572,742)
Total liabilities	(3,740,327)		(3,740,327)			(3,607,291)
Stockholder's equity:
Capital in excess of par	(1,951,492)		(1,951,492)			(1,944,992)
Retained earnings	(366,079)		(366,079)			(238,493)
Accumulated other comprehensive income (loss)	(21,465)		(21,465)			2,671
Total stockholder's equity	(2,339,036)		(2,339,036)			(2,180,814)
Total liabilities and stockholder's equity	(6,079,363)		(6,079,363)			(5,788,105)
Consolidated Statements of Operations and Comprehensive Income (Loss)
Equity in income of subsidiaries	(46,771)	(59,037)	(144,429)	(131,942)
Net income (loss)	(46,771)	(59,037)	(144,429)	(131,942)
Foreign currency translation adjustment, net of taxes	(13,238)	2,938	(21,666)	35,403
Change in fair value of interest rate swaps, net of taxes	(699)	(1,161)	(2,469)	(3,422)
Comprehensive income (loss)	(60,708)	(57,260)	(168,564)	(99,961)
Statements of cash flows
Cash (used in) provided by operating activities			(21,499)	(104,832)
Cash used in investing activities			6,500
Dividends paid			16,843	104,832
Cash used in financing activities			10,343	104,832
Eliminations | As Reported
Current Assets
Intercompany						(1,121,800)
Total current assets						(1,121,800)
Intercompany						(323,300)
Investments in subsidiaries						(3,211,100)
Total assets						(4,656,100)
Current liabilities:
Intercompany						(1,121,800)
Total current liabilities						(1,121,800)
Intercompany						(323,300)
Total liabilities						(1,445,000)
Stockholder's equity:
Capital in excess of par						(653,300)
Retained earnings						(2,556,600)
Accumulated other comprehensive income (loss)						(1,200)
Total stockholder's equity						(3,211,100)
Total liabilities and stockholder's equity						(4,656,100)
Consolidated Statements of Operations and Comprehensive Income (Loss)
Equity in income of subsidiaries		(82,600)		(206,400)
Net income (loss)		(82,600)		(206,400)
Foreign currency translation adjustment, net of taxes		2,900		35,400
Comprehensive income (loss)		$ (79,600)		$ (171,000)