Discontinued Operations Reconciliation of Major Classes of Assets and Liabilities of the Discontinued Operation classified as Held for Sale (Details) - USD ($) $ in Millions	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Disposal Group, Including Discontinued Operation, Assets [Abstract]
Cash and cash equivalents	$ 0	$ 44	$ 45
Discontinued Operations, Held-for-sale or Disposed of by Sale | Thermal Systems
Disposal Group, Including Discontinued Operation, Assets [Abstract]
Cash and cash equivalents		44
Accounts receivable, net		79
Inventories, net		17
Property, net		74
Intangible assets, net		1
Other assets		8
Total assets classified as held for sale		223
Disposal Group, Including Discontinued Operation, Liabilities [Abstract]
Accounts payable		97
Accrued liabilities		27
Other liabilities		6
Total liabilities classified as held for sale		130
Discontinued Operations, Held-for-sale or Disposed of by Sale | Thermal Systems | SDAAC
Disposal Group, Including Discontinued Operation, Liabilities [Abstract]
Noncontrolling interest attributable to discontinued operations		$ 109