Information By Segment and Geographic Region (Corporate Related Expenses And Assets) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Segment Reporting Information [Line Items]
Capital Expenditures	$ 271	$ 175	$ 181
Depreciation Expense	182	142	169
Products
Segment Reporting Information [Line Items]
Capital Expenditures	104	76	87
Depreciation Expense	68	82	94
Services
Segment Reporting Information [Line Items]
Capital Expenditures	167	99	94
Depreciation Expense	$ 114	$ 60	$ 75