Texas Pipeline Business Acquisition - Assets Acquired and Liabilities Assumed (Details) - USD ($) $ in Millions	Dec. 31, 2015	Oct. 01, 2015	Dec. 31, 2014
Assets
Noncurrent other assets (goodwill, see Note 1 - Goodwill and Other Intangible Assets)	$ 778		$ 147
NET Holdings Management, LLC [Member]
Assets
Property, plant and equipment		$ 806
Cash		1
Other receivables and current other assets		21
Noncurrent other assets (other intangible assets, see Note 1 - Goodwill and Other Intangible Assets)		720
Noncurrent other assets (goodwill, see Note 1 - Goodwill and Other Intangible Assets)		622
Total assets		2,170
Liabilities
Long-term debt, including current portion		706
Accounts payable and current other liabilities		46
Noncurrent other liabilities, primarily acquisition holdbacks		415
Total liabilities		1,167
Less noncontrolling interest at fair value		69
Total cash consideration		$ 934