Earnings per Share - Basic Earnings per share reconciliation (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Income (Loss) from Continuing Operations, Per Basic Share (in USD per share)	$ 0.04	$ (0.04)	$ 0.02	$ (0.54)
Net Income (Loss)	$ 11	$ (7)	$ 12	$ (107)
Dividend - Preferred Stock	(2)	(2)	(7)	(7)
Adjusted Net Income (Loss) Available to Common Shareholders	$ 9	$ (9)	$ 5	$ (114)
Weighted Average Number of Shares Outstanding, Basic (in shares)	212,633	209,244	212,438	209,958
Restricted Stock and Performance Shares [Member]
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Incremental Common Shares Attributable to Dilutive Effect of Share-based Payment Arrangements (in shares)	7,184	0	7,239	0