Commitments and Contingencies (Details 2) (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
Operating Leases
Operating Leases, Rent Expense	$ 125	$ 83		$ 93	$ 58
Sublease rental income received	10	4		8	4
Operating leases:
2014		59
2015		51
2016		46
2017		41
2018		34
2019 and thereafter		61
Total future minimum payments		292	[1]
Minimum sublease rentals due in the future under non-cancelable subleases		32
Purchase Obligations
Total purchase commitments		284
2014		100
2015 through 2016		134
2016 through 2017		46
2018 and thereafter		$ 4

[1] Minimum payments have not been reduced by minimum sublease rentals of $32 million due in the future under non-cancelable subleases.