Income Taxes - Details Income (Loss) Before Income Taxes (Detail) (USD $) In Millions, unless otherwise specified	1 Months Ended	11 Months Ended	12 Months Ended
	Jan. 31, 2011	Dec. 31, 2011	Dec. 31, 2013	Dec. 31, 2012
Schedule Of Income Taxes [Line Items]
Income (Loss) before Income Taxes	$ 632	$ 262	$ (61)	$ 1,008
Successor [Member]
Schedule Of Income Taxes [Line Items]
Income (Loss) before Income Taxes		262	(61)	1,008
Successor [Member] | Australia [Member]
Schedule Of Income Taxes [Line Items]
Income (Loss) before Income Taxes		70	(185)	1,019
Successor [Member] | United States [Member]
Schedule Of Income Taxes [Line Items]
Income (Loss) before Income Taxes		120	(285)	10
Successor [Member] | Other [Member]
Schedule Of Income Taxes [Line Items]
Income (Loss) before Income Taxes		72	409	(21)
Predecessor [Member]
Schedule Of Income Taxes [Line Items]
Income (Loss) before Income Taxes	632
Predecessor [Member] | Australia [Member]
Schedule Of Income Taxes [Line Items]
Income (Loss) before Income Taxes	107
Predecessor [Member] | United States [Member]
Schedule Of Income Taxes [Line Items]
Income (Loss) before Income Taxes	497
Predecessor [Member] | Other [Member]
Schedule Of Income Taxes [Line Items]
Income (Loss) before Income Taxes	$ 28