Property, Plant and Equipment (Details 2) (USD $) In Millions, unless otherwise specified	9 Months Ended	12 Months Ended		3 Months Ended	0 Months Ended
	Dec. 31, 2011	Dec. 31, 2013	Dec. 31, 2012	Mar. 31, 2012 Predecessor	Apr. 02, 2012 Office Building	Apr. 02, 2013 Office Building
Property, plant and equipment
Depreciation expense	$ 914	$ 1,099	$ 1,175	$ 393
Proceeds from sale of office building					133
Deferred Gain on Sale of Property						$ (16)
Deferred Gain on Sale of Property, Recognition Period					10 years