Business and Basis of Presentation (Narrative) (Details) $ in Millions	3 Months Ended	9 Months Ended
	Sep. 30, 2020 USD ($)	Sep. 30, 2020 subsidiary
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Number Of Subsidiaries | subsidiary		1
Income (loss) from operations before income taxes and equity in earnings of operating joint venture
Out of period adjustment | $	$ (8)