Consolidated Balance Sheets (Parenthetical) - USD ($) shares in Thousands, $ in Millions	Jun. 30, 2021	Dec. 31, 2020
Successor [Member]
Allowances for accounts receivable, current	$ 18
Common stock, par value (in dollars per share)	$ 0.01
Common stock, shares authorized (in shares)	1,750,000
Common stock, shares issued (in shares)	244,401
Common stock, shares outstanding (in shares)	244,401
Predecessor [Member]
Allowances for accounts receivable, current		$ 130
Common stock, par value (in dollars per share)		$ 0.25
Common stock, shares authorized (in shares)		175,000
Common stock, shares issued (in shares)		106,025
Common stock, shares outstanding (in shares)		104,793