Equity (Change In Common Units) (Details)	9 Months Ended
	Sep. 30, 2011
Partners' Capital Notes [Abstract]
Outstanding at December 31, 2010	193,212,590
Common Units issued in connection with public offerings	14,202,500
Common Units issued in connection with the Equity Distribution Agreement	1,895,715
Common Units issued in connection with the Distribution Reinvestment Plan	175,863
Common Units issued in connection with propane asset purchase	66,499
Common Units issued under equity incentive plans	25,388
Outstanding at September 30, 2011	209,578,555