Discontinued Operations and Held for sale businesses (Details) - USD ($) $ in Millions		3 Months Ended			9 Months Ended
	Apr. 21, 2017	Sep. 30, 2017	Mar. 31, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016	Oct. 02, 2017	Dec. 31, 2016
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Assets Carrying Amount Disclosure Nonrecurring		$ 622			$ 622
Accumulated Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment, Net of Tax		(2,030)			(2,030)			$ (2,147)
Discontinued Operation, Gain (Loss) on Disposal of Discontinued Operation, Net of Tax		0		$ 0	0	$ (382)
Discontinued Operation, Tax Effect of Discontinued Operation		0		0	0	(4)
Income (Loss) from Discontinued Operations, Net of Tax, Attributable to Parent		0		(1)	0	(389)
Proceeds from Divestiture of Businesses and Interests in Affiliates					39	157
Kazakhstan Hydro [Member] | Disposal Group, Held-for-sale, Not Discontinued Operations [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Pre-tax income of disposed businesses, Excluding gain on disposal, included in continuing operations		12		10	33	28
Disposal Group, Including Discontinued Operation, Consideration		77			77
Zimmer Station [Member] | Disposal Group, Held-for-sale, Not Discontinued Operations [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Pre-tax income of disposed businesses, Excluding gain on disposal, included in continuing operations		11			19
Pre-tax loss of disposed businesses, Excluding gain on disposal, included in continuing operations				1		(10)
Proceeds from Divestiture of Businesses and Interests in Affiliates	$ 50
Kazakhstan [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Impairment of Long-Lived Assets to be Disposed of		0		0	94	0
Kazakhstan Hydro [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Impairment of Long-Lived Assets to be Disposed of		2		0	92	0
Sul Subsidiary [Member]
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	68
Disposal Group, Including Discontinued Operation, Revenue				213		632
Disposal Group, Including Discontinued Operation, Costs of Goods Sold				(200)		(608)
Impairment Expense Pre Tax Total				0		(783)
Disposal Group, Including Discontinued Operation, Other Expense				(14)		(35)
Discontinued Operation, Income (Loss) from Discontinued Operation, before Income Tax				(1)		(794)
Discontinued Operation, Tax Effect of Discontinued Operation				0		405
Income (Loss) from Discontinued Operations, Net of Tax, Attributable to Parent		0		$ (1)	0	(389)
Cash Provided by (Used in) Investing Activities, Discontinued Operations					0	$ (63)
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			0
Disposal Group, Including Discontinued Operation, Liabilities		0			0			$ 0
Disposal Group, Held-for-sale, Not Discontinued Operations [Member] | Kazakhstan [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Assets Carrying Amount Disclosure Nonrecurring			$ 171
Fair Value Less Costs To Sell			29
Impairment of Long-Lived Assets to be Disposed of			$ 94
Disposal Group, Held-for-sale, Not Discontinued Operations [Member] | Kazakhstan Hydro [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Assets Carrying Amount Disclosure Nonrecurring		114			114
Accumulated Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment, Net of Tax		$ 103			103
Impairment of Long-Lived Assets to be Disposed of					$ 92
Subsequent Event [Member] | Kazakhstan Hydro [Member] | Disposal Group, Held-for-sale, Not Discontinued Operations [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Noncontrolling Interest, Ownership Percentage by Parent							100.00%