Subsequent Events Narrative (Details) (USD $) In Millions, unless otherwise specified		3 Months Ended		3 Months Ended	9 Months Ended	3 Months Ended
	Dec. 31, 2009 Property	Dec. 31, 2013 Subsequent Event [Member] Barnett Lease [Member]	Nov. 01, 2013 Subsequent Event [Member] Barnett Lease [Member] Property	Dec. 31, 2013 Subsequent Event [Member] Scenario, Forecast [Member] Barnett Lease [Member]	Sep. 30, 2013 Rigs	Dec. 31, 2013 Rigs Subsequent Event [Member]	Dec. 31, 2013 Rigs Subsequent Event [Member] Scenario, Forecast [Member]	Dec. 31, 2013 Minimum Rigs Subsequent Event [Member] Scenario, Forecast [Member]
Subsequent Event [Line Items]
Number Of Real Estate Assets Financed	111		106
Lease Termination Costs		$ 257
Gain (Loss) on Contract Termination				120
Number of repurchased equipment					28	9
Operating Leases, Future Minimum Payments Due					239			58
Payments to Acquire Property, Plant, and Equipment							$ 70