Reorganization of Businesses (Net Charges Incurred By Business Segment) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Restructuring Cost and Reserve [Line Items]
Reorganization of business charges	$ 140	$ 117	$ 73
Products
Restructuring Cost and Reserve [Line Items]
Reorganization of business charges	106	84	48
Services
Restructuring Cost and Reserve [Line Items]
Reorganization of business charges	$ 34	$ 33	$ 25