Consolidated Statements of Equity (Parenthetical) - USD ($) $ in Millions	6 Months Ended		12 Months Ended
	Dec. 31, 2014	Jul. 09, 2014	Dec. 31, 2016
Issuance of stock (in shares)	13,102
Issuance of shares of nonvested stock (in shares)	111,060		61,244
Issuance of shares of RSUs (in shares)			3,138
Series A Preferred Stock
Issuance of stock (in shares)			27,061,856
Predecessor
Issuance of new equity interests in connection with emergence from Chapter 11 in connection with the Rights Offering		$ 100
Issuance of new equity interests in connection with emergence from Chapter 11 in connection with the Rights Offering (in shares)		6,029,976