Consolidated Balance Sheet Parentheticals - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020
Accounts Receivable, Allowance for Credit Loss, Current	$ 0	$ 0
Finite-Lived Intangible Assets, Accumulated Amortization	$ 103	$ 97
Common stock, shares authorized (in shares)	1,000	1,000
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares issued (in shares)	935.51	935.51