Discontinued Operations and Held for sale businesses (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Dec. 31, 2016
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Cash Provided by (Used in) Operating Activities, Discontinued Operations	$ 0	$ 14
Discontinued Operation, Tax Effect of Discontinued Operation	0	4
Income (Loss) from Discontinued Operations, Net of Tax, Attributable to Parent	0	(9)
Cash Provided by (Used in) Investing Activities, Discontinued Operations	0	(42)
Sul Subsidiary [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Disposal Group, Including Discontinued Operation, Revenue		200
Disposal Group, Including Discontinued Operation, Costs of Goods Sold		(204)
Disposal Group, Including Discontinued Operation, Other Expense		(9)
Discontinued Operation, Income (Loss) from Discontinued Operation, before Income Tax		(13)
Discontinued Operation, Tax Effect of Discontinued Operation		4
Income (Loss) from Discontinued Operations, Net of Tax, Attributable to Parent	0	$ (9)
Sul Subsidiary [Member] | Discontinued Operations [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Disposal Group, Including Discontinued Operation, Assets	0		$ 0
Disposal Group, Including Discontinued Operation, Liabilities	$ 0		$ 0