Information by Segment and Geographic Region - Corporate Related Expenses and Assets (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Segment Reporting Information [Line Items]
Capital Expenditures	$ 248	$ 197	$ 227
Depreciation Expense	186	172	192
Products and Systems Integration
Segment Reporting Information [Line Items]
Capital Expenditures	98	72	113
Depreciation Expense	82	71	69
Software and Services
Segment Reporting Information [Line Items]
Capital Expenditures	150	125	114
Depreciation Expense	$ 104	$ 101	$ 123