Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020
Consolidated Balance Sheets
Accounts payable to affiliates	$ 1	$ 7
Deferred revenue to affiliates	$ 24	$ 38
Common stock, par value (in dollars per share)	$ 1	$ 1
Common stock, authorized shares	1,250,000	1,250,000
Common stock, issued shares	1,160,779	1,160,779
Common stock, outstanding shares	1,160,779	1,160,779