Information By Segment and Geographic Region (Corporate Related Expenses And Assets) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Segment Reporting Information [Line Items]
Capital Expenditures	$ 175	$ 181	$ 169
Depreciation Expense	142	169	157
Products
Segment Reporting Information [Line Items]
Capital Expenditures	76	87	90
Depreciation Expense	82	94	93
Services
Segment Reporting Information [Line Items]
Capital Expenditures	99	94	79
Depreciation Expense	$ 60	$ 75	$ 64