Acquisitions (Details Numeric) - Allegorithmic $ in Millions	Jan. 23, 2019 USD ($)
Business Acquisition
Business combination, purchase price for remaining interest	$ 106
Total estimated purchase price	161
Business combination, step acquisition, equity interest in acquiree, remeasurement gain (loss), net	42
Business combination, step acquisition, equity interest in acquiree, fair value	55
Goodwill, acquired during period	126
Business combination, Identifiable assets acquired	$ 45