CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY (Parenthetical) - USD ($) $ in Millions		Dec. 31, 2019	Dec. 31, 2018	Jan. 01, 2018	Dec. 31, 2017
Common stock, shares authorized (in shares)		500,000,000	500,000,000		500,000,000
Common stock, par value per share (in dollars per share)		$ 0.001	$ 0.001		$ 0.001
Noncontrolling interests			$ 141		$ 184
Cumulative effect of change in accounting principle	[1]			$ 0
Accumulated Other Comprehensive Loss
Cumulative effect of change in accounting principle	[1]			$ (4)

[1] In 2018, the Company adopted ASU No. 2018-02, Income Statement - Reporting Comprehensive Income (Topic 220): Reclassification of Certain Tax Effects from Accumulated Other Comprehensive Income, and made a $4 million adjustment to reclassify stranded tax effects in Accumulated Other Comprehensive Loss to Retained Earnings.