Goodwill and Intangible Assets - Textual Information (Details) - USD ($) $ in Millions	3 Months Ended			9 Months Ended
	Sep. 30, 2016	Jun. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Finite-Lived Intangible Assets [Line Items]
Goodwill impairment	$ 17		$ 0	$ 1,858	$ 0
Amortization expense for intangible assets included in net income	$ 17		$ 26	59	$ 77
Minimum
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Asset, Useful Life	3 years
Maximum
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Asset, Useful Life	30 years
Customer Relationships and Technology [Member]
Finite-Lived Intangible Assets [Line Items]
Impairment of Intangible Assets, Finite-lived	$ 15			116
North America
Finite-Lived Intangible Assets [Line Items]
Goodwill impairment		$ 1,530		1,549
Industrial Services
Finite-Lived Intangible Assets [Line Items]
Goodwill impairment		$ 311		$ 309