EARNINGS PER SHARE (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended								12 Months Ended
	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2012
Numerator:
Income from continuing operations	$ 168,705	$ 192,290	$ 174,589	$ 173,182	$ 159,797	$ 250,978	$ 151,067	$ 159,611	$ 708,766	$ 721,453	$ 573,609
Income (loss) from discontinued operations									(47)	15,186	7,436
NET INCOME	168,688	192,279	174,570	173,182	159,797	266,159	151,080	159,603	708,719	736,639	581,045
Adjustment for basic earnings per share:
Earnings allocated to unvested shareholders									(4,145)	(3,842)	(2,246)
Numerator for basic earnings per share:
From continuing operations									704,621	717,611	571,363
From discontinued operations									(47)	15,186	7,436
Net income (loss) attributable to parent, basic									704,574	732,797	578,799
Adjustment for diluted earnings per share:
Effect of reallocating undistributed earnings of unvested shareholders									30	46	31
Numerator for diluted earnings per share:
From continuing operations									704,651	717,657	571,394
From discontinued operations									(47)	15,186	7,436
Net income (loss) attributable to parent, diluted									$ 704,604	$ 732,843	$ 578,830
Denominator:
Denominator for basic earnings per share - weighted-average shares									107,800	106,286	106,819
Effect of dilutive shares from stock options and restricted stock (in shares)									1,341	1,593	1,558
Denominator for diluted earnings per share - adjusted weighted-average shares									109,141	107,879	108,377
Basic earnings per common share:
Income from continuing operations (in dollars per share)	$ 1.55	$ 1.77	$ 1.61	$ 1.61	$ 1.49	$ 2.35	$ 1.41	$ 1.50	$ 6.54	$ 6.75	$ 5.35
Income from discontinued operations (in dollars per share)										$ 0.14	$ 0.07
Net income (in dollars per share)	$ 1.55	$ 1.77	$ 1.61	$ 1.61	$ 1.49	$ 2.49	$ 1.41	$ 1.50	$ 6.54	$ 6.89	$ 5.42
Diluted earnings per common share:
Income from continuing operations (in dollars per share)	$ 1.53	$ 1.75	$ 1.59	$ 1.59	$ 1.47	$ 2.32	$ 1.39	$ 1.48	$ 6.46	$ 6.65	$ 5.27
Income from discontinued operations (in dollars per share)										$ 0.14	$ 0.07
Net income (in dollars per share)	$ 1.53	$ 1.75	$ 1.59	$ 1.59	$ 1.47	$ 2.46	$ 1.39	$ 1.48	$ 6.46	$ 6.79	$ 5.34
Outstanding equity awards
Shares excluded from calculation of diluted earnings per share									215	743	446
Weighted-average price per share (in dollars per share)									$ 79.67	$ 57.27	$ 59.68