Cash And Cash Equivalents Non-Cash Investing and Financing Activities (Details) (USD $) In Millions, unless otherwise specified	9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012
NON-CASH INVESTING ACTIVITIES:
Accrued capital expenditures	$ 190	$ 391
NON-CASH FINANCING ACTIVITIES:
Contributions receivable related to noncontrolling interest	0	13
Issuance of common units in connection with acquisitions	0	112
AmeriGas [Member]
NON-CASH INVESTING ACTIVITIES:
AmeriGas limited partner interests received in exchange for contribution of Propane Business	0	1,123
Regency [Member]
NON-CASH INVESTING ACTIVITIES:
AmeriGas limited partner interests received in exchange for contribution of Propane Business	961	0
Holdco Acquisition [Member]
NON-CASH FINANCING ACTIVITIES:
Issuance of common units in connection with acquisitions	$ 2,464	$ 0