Condensed Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Millions	Jun. 30, 2021	Dec. 31, 2020
Statement Of Financial Position [Abstract]
Accounts receivable, allowance for doubtful accounts	$ 1	$ 1
Property, plant and equipment, accumulated depreciation	$ 725	$ 692
Common stock, par value	$ 0.001	$ 0.001
Common stock, shares authorized	2,000,000,000	2,000,000,000
Common stock, shares issued	210,000,000	210,000,000
Common stock, shares outstanding	210,000,000	210,000,000