Subsequent Events Subsequent Events - Composition of Acquisition Consideration (Details) - Subsequent Event [Member] - USD ($) $ in Millions		Jul. 16, 2021	Jul. 16, 2020	Jul. 16, 2018
Schedule of Business Acquisitions by Acquisition, Consideration [Line Items]
Total purchase price				$ 1,700
Centaur Holdings, LLC [Member]
Schedule of Business Acquisitions by Acquisition, Consideration [Line Items]
Cash paid on the Centaur Closing Date				1,630
Business Combination Deferred Consideration Present Value	[1]			$ 66
Total purchase price			$ 1,696
Business Combination Deferred Consideration Face Value	[1]	$ 50	$ 25

[1] (1) Deferred consideration is payable in an installment of $25 million on the second anniversary of the Centaur Closing Date and $50 million on the third anniversary of the Centaur Closing Date with prepayments and right of setoff permitted, subject to the terms and conditions of the Unit Purchase Agreement. $66 million represents the present value of future expected cash flows.