Note 10 - Non-wholly Owned Entities (Details) - Equity Method Investments (USD $) In Millions, unless otherwise specified	Dec. 31, 2014		Dec. 31, 2013
Schedule of Equity Method Investments [Line Items]
Equity Method Investments	$ 80		$ 86
Triton [Member]
Schedule of Equity Method Investments [Line Items]
Equity Method Investments	62		70
Horizon Pipeline [Member]
Schedule of Equity Method Investments [Line Items]
Equity Method Investments	14		15
Other Equity Investments [Member]
Schedule of Equity Method Investments [Line Items]
Equity Method Investments	$ 4	[1]	$ 1	[1]

[1] Includes our current investment in PennEast Pipeline of $1 million and Atlantic Coast pipeline of $2 million as of December 31, 2014.