Earnings Per Share (Tables)

12 Months Ended

Dec. 31, 2018

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Schedule Of Basic And Diluted Earnings Per Share

		Years Ended December 31,
In millions except per share amounts		2018		2017			2016
Basic earnings per share:
	Net income (loss) available to common shareholders		(296)		(1,605)		(338)
	Basic weighted average shares (1)		89.0		118.9		133.0
	Net income (loss) per basic common share	$	(3.33)	$	(13.50)	$	(2.54)
Diluted earnings per share:
	Net income (loss) available to common shareholders		(296)		(1,605)		(338)
	Diluted weighted average shares		89.0		118.9		133.0
	Net income (loss) per diluted common share	$	(3.33)	$	(13.50)	$	(2.54)
	Potentially dilutive securities excluded from the diluted EPS because of antidilutive affect		4.4		14.1		16.5
	(1) Includes 0.8 million, 0.3 million and 0.9 million of participating securities that met the service condition and were eligible to receive nonforfeitable dividends or dividend
	equivalents for the years ended December 31, 2018, 2017 and 2016, respectively.