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		9 Months Ended
	Mar. 31, 2013	Mar. 31, 2012	Mar. 31, 2013	Mar. 31, 2012
Numerator:
Net income attributable to common shareholders	$ 256,560	$ 312,074	$ 677,263	$ 849,858
Denominator:
Basic - weighted average common shares	149,287,628	151,017,910	149,191,583	151,472,380
Increase in weighted average common shares from dilutive effect of equity-based awards	3,072,984	3,926,336	2,661,939	3,432,169
Diluted - weighted average common shares, assuming exercise of equity-based awards	152,360,612	154,944,246	151,853,522	154,904,549
Basic earnings per share (in usd per share)	$ 1.72	$ 2.07	$ 4.54	$ 5.61
Diluted earnings per share (in usd per share)	$ 1.68	$ 2.01	$ 4.46	$ 5.49