Earnings Per Share Earnings Per Share - Reconciliation of Numberator and Denominator of Basic and Diluted Earnings Per Share (Details) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2012	Dec. 31, 2011
Numerator:
Net income attributable to common shareholders	$ 180,962	$ 240,766	$ 420,703	$ 537,784
Denominator:
Basic - weighted average common shares	149,001,273	150,960,202	149,143,561	151,699,614
Increase in weighted average common shares from dilutive effect of equity-based awards	3,197,431	3,757,009	2,874,464	3,324,865
Diluted - weighted average common shares, assuming exercise of equity-based awards	152,198,704	154,717,211	152,018,025	155,024,479
Basic earnings per share	$ 1.21	$ 1.59	$ 2.82	$ 3.55
Diluted earnings per share	$ 1.19	$ 1.56	$ 2.77	$ 3.47