Stockholders' Equity and Earnings per Share (Details 5) - USD ($) shares in Thousands, $ in Millions	1 Months Ended	3 Months Ended		9 Months Ended
	Mar. 31, 2015	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Stockholders' Equity and Earnings per Share [Abstract]
Basic		219,359	225,727	219,689	228,477
Incremental Common Shares Attributable To Share Based Payment Arrangements		4,878			4,834
Incremental Common Shares Attributable to Call Options and Warrants		15,999			2,221
Weighted Average Number of Shares Outstanding, Diluted, Total		240,236	225,727	219,689	235,532
Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount		0	9,900	17,600	2,000
Call options purchased on common stock	6,000
Total premium	$ 80.0
Capped calls associated with the warrants exercisable in 2016 (as a percent)		49.00%
Capped calls associated with warrants exercisable in 2017 (as a percent)		45.00%		45.00%
Exercisable warrants covered in 2016		90.00%		90.00%