Earnings Per Share (Narrative) (Details) (USD $) Share data in Millions	0 Months Ended	3 Months Ended
	Aug. 29, 2011	Sep. 30, 2011	Jun. 30, 2011
Date of accelerated repurchase agreement		August 29, 2011
Amount paid for common stock under accelerated repurchase agreement (in shares)	4
Payment amount allocated to treasury stock for accelerated share repurchase agreement		$ 346,244,000	$ 136,631,000
Bank Of America N.A. [Member]
Amount paid for common stock under accelerated repurchase agreement	209,700,000
Payment amount allocated to treasury stock for accelerated share repurchase agreement		$ 209,700,000