CONSOLIDATED STATEMENT OF EQUITY (Parenthetical) (USD $) In Millions	9 Months Ended
	Sep. 30, 2011
Paid-in Capital [Member]
Sale of subsidiary units, tax	$ 18
Conversion of subordinated limited partner units to common units, tax	82
Noncontrolling Interests [Member]
Sale of subsidiary units, tax	9
Conversion of subordinated limited partner units to common units, tax	$ (82)