Related Party Costs and Expenses [Text] (Details) (SAC Holdings, Four SAC, Five SAC, Galaxy, and Private Mini, USD $) In Millions, unless otherwise specified	9 Months Ended
	Dec. 31, 2012
SAC Holdings, Four SAC, Five SAC, Galaxy, and Private Mini
Related party costs and expenses:
Revenue, excluding dealer agreement commissions and expenses	$ 24
Revenue, generated by the dealer agreement from related parties	158
Commission expenses, generated from dealer agreement with related parties	35
Expenses, related parties	(2)
Cash flow, related party	$ (153)