Net Income Per Share (Tables)

6 Months Ended

Jun. 30, 2019

Earnings Per Share [Abstract]

Reconciliation of earnings attributable to common stockholders, basic and diluted

The components of basic and diluted net income per share attributable to common stockholders are as follows:

	Three Months Ended June 30,					Six Months Ended June 30,
	2019			2018		2019			2018
	(in millions)
Net income (loss) attributable to common stockholders	$	(169	)	$	66	$	181		$	244
Participating share-based earnings	—			—		(1		)	(2		)
Basic and diluted net income (loss) attributable to common stockholders	$	(169	)	$	66	$	180		$	242

Basic weighted average shares outstanding is reconciled to diluted weighted average shares outstanding as follows:

	Three Months Ended June 30,		Six Months Ended June 30,
	2019	2018	2019	2018
	(in millions)
Basic weighted average shares outstanding	168	170	168	170
Dilution attributable to stock-based compensation awards	—	1	1	1
Diluted weighted average shares outstanding	168	171	169	171