General - Discontinued Operations (Details) - USD ($) $ / shares in Units, $ in Millions	Jan. 04, 2021	Mar. 31, 2021	Dec. 31, 2020
Merger Agreement
Discontinued Operations
Cash price paid per share	$ 95.00
MCC Business | Discontinued Operations, Disposed of by Sale
Discontinued Operations
Disposal Group, Including Discontinued Operation, Consideration		$ 850	$ 850
Disposal Group, Including Discontinued Operation, Consideration, Closing Adjustments		$ 158	$ 158