Note 11—Loss Per Share

The numerator and denominator used for the computation of basic and diluted per share loss were as follows (in millions, except per share data):


	Three months ended September 30,								Nine months ended September 30,
	2018				2017				2018				2017
	Basic		Diluted		Basic		Diluted		Basic		Diluted		Basic		Diluted
Numerator for loss per share
Net loss attributable to controlling interest	$	(409)	$	(409)	$	(1,417)	$	(1,417)	$	(1,754)	$	(1,754)	$	(3,016)	$	(3,016)
Undistributed earnings allocable to participating securities		—		—		—		—		—		—		—		—
Net loss available to shareholders	$	(409)	$	(409)	$	(1,417)	$	(1,417)	$	(1,754)	$	(1,754)	$	(3,016)	$	(3,016)

Denominator for loss per share
Weighted-average shares outstanding		463		463		391		391		454		454		391		391
Effect of share-based awards and other equity instruments		—		—		—		—		—		—		—		—
Weighted-average shares for per share calculation		463		463		391		391		454		454		391		391

Per share loss	$	(0.88)	$	(0.88)	$	(3.62)	$	(3.62)	$	(3.86)	$	(3.86)	$	(7.72)	$	(7.72)

In the three and nine months ended September 30, 2018, we excluded from the calculation 10.7 million share‑based awards since the effect would have been anti‑dilutive. In the three and nine months ended September 30, 2017, we excluded from the calculation 5.6 million and 4.7 million share‑based awards, respectively, since the effect would have been anti‑dilutive. In the three and nine months ended September 30, 2018, we excluded from the calculation 84.0 million and 74.9 million shares issuable upon conversion of the Exchangeable Bonds, respectively, since the effect would have been anti‑dilutive.