CONSOLIDATED STATEMENTS OF CASH FLOWS (Parenthetical) (USD $) In Millions, unless otherwise specified	9 Months Ended	12 Months Ended		3 Months Ended
	Dec. 31, 2011	Dec. 31, 2013	Dec. 31, 2012	Mar. 31, 2011 Predecessor
Interest paid, capitalized interest	$ 8	$ 17	$ 18	$ 3