Investments Schedule of Earnings from Investments (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Schedule of Equity Method Investments [Line Items]
Equity Method Investments	$ 2,225	$ 1,856
Held-to-maturity Securities	8	8
Long-term Investments	2,233	1,864	3,346
Equity Method Investment, Summarized Financial Information, Current Assets	483	440
Equity Method Investment, Summarized Financial Information, Revenue	1,655	2,199	2,313
Earnings from equity investments	297	295	224
Other Depreciation and Amortization	10	7	7
Equity Method Investment, Summarized Financial Information, Cost of Sales	1,186	1,617	1,747
Equity Method Investment, Summarized Financial Information, Net Income (Loss)	469	582	566
Equity Method Investment, Summarized Financial Information, Noncurrent Assets	5,827	5,736
Equity Method Investment, Summarized Financial Information, Current Liabilities	895	1,009
Equity Method Investment, Summarized Financial Information, Noncurrent Liabilities	2,053	2,015
Equity Method Investment, Summarized Financial Information, Equity Excluding Noncontrolling Interests	3,362	3,152
Plantation Pipe Line Company [Member]
Schedule of Equity Method Investments [Line Items]
Equity Method Investments	179	181
Earnings from equity investments	56	51	45
Fayettville Express Pipeline LLC [Member]
Schedule of Equity Method Investments [Line Items]
Equity Method Investments	144	159
Earnings from equity investments	55	55	24
Midcontinent Express Pipeline LLC [Member]
Schedule of Equity Method Investments [Line Items]
Equity Method Investments	602	633
Earnings from equity investments	40	42	43
Red Cedar Gathering Company [Member]
Schedule of Equity Method Investments [Line Items]
Equity Method Investments	176	172
Earnings from equity investments	31	32	32
Cortez Pipeline Company [Member]
Schedule of Equity Method Investments [Line Items]
Equity Method Investments	12	11
Earnings from equity investments	24	25	24
Eagle Ford Gathering LLC [Member]
Schedule of Equity Method Investments [Line Items]
Equity Method Investments		151
Earnings from equity investments	14	34	11
Watco Companies, LLC [Member]
Schedule of Equity Method Investments [Line Items]
Equity Method Investments	103	103
Earnings from equity investments	13	13	6
Fort Union Pipeline [Member]
Schedule of Equity Method Investments [Line Items]
Equity Method Investments	161	0
Earnings from equity investments	11	0	0
EagleHawk Field Services LLC [Member]
Schedule of Equity Method Investments [Line Items]
Equity Method Investments	272	208
Earnings from equity investments	9	11	3
Parkway Pipeline LLC [Member]
Schedule of Equity Method Investments [Line Items]
Equity Method Investments	131	58
Earnings from equity investments	1	0	0
Double Eagle [Member]
Schedule of Equity Method Investments [Line Items]
Equity Method Investments	144	0
Earnings from equity investments	1	0	0
KinderHawk Field Services LLC [Member]
Schedule of Equity Method Investments [Line Items]
Earnings from equity investments	0	0	22
Industrial, Miscellaneous, and All Others [Member]
Schedule of Equity Method Investments [Line Items]
Equity Method Investments	301	180
Earnings from equity investments	$ 42	$ 32	$ 14