Risks And Uncertainties (Details) $ in Millions	12 Months Ended
	Dec. 31, 2019 USD ($) segment business integer	Dec. 31, 2018 USD ($)
Unusual Risk or Uncertainty [Line Items]
Number of Reportable Segments | segment	4
Segment Reporting, Additional Information about Entity's Reportable Segments | business	2
Cash and Cash Equivalents, at Carrying Value	$ 1,029	$ 1,166
Percentage of Total Revenue Non-U.S.	68.00%
Goodwill, Gross	$ 3,670	3,792
Number Of Single Customers That Accounted For Ten Percent Or More Of Total Revenue | integer	0
Cash and Cash Equivalents [Member]
Unusual Risk or Uncertainty [Line Items]
Cash and Cash Equivalents, at Carrying Value	$ 1,000
Operating Segments [Member] | ANDES [Member]
Unusual Risk or Uncertainty [Line Items]
Reporting Unit, Percentage of Fair Value in Excess of Carrying Amount	3.00%
Goodwill, Gross	$ 868	$ 868