Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Millions	Dec. 31, 2017	Dec. 31, 2016
Allowance for doubtful accounts	$ 3
Preferred stock, par value (in USD per share)
Preferred stock, shares authorized
Preferred stock, shares issued
Preferred stock, shares outstanding
Common stock, par value (in USD per share)
Common stock, shares authorized
Common stock, shares issued
Common stock, shares outstanding
Predecessor
Allowance for doubtful accounts		$ 29
Preferred stock, par value (in USD per share)		$ 0.01
Preferred stock, shares authorized		10,000,000
Preferred stock, shares issued		0
Preferred stock, shares outstanding		0
Common stock, par value (in USD per share)		$ 0.01
Common stock, shares authorized		433,333,333
Common stock, shares issued		356,374,473
Common stock, shares outstanding		356,374,473