Subsequent Events (Details) (USD $) In Millions, except Per Share data, unless otherwise specified	0 Months Ended
	Feb. 11, 2013 Depositary units [Member]	Nov. 01, 2013 Limited partners Depositary units [Member] Dividend Declared [Member]	Aug. 06, 2013 Limited partners Depositary units [Member] Dividend Declared [Member]	Apr. 29, 2013 Limited partners Depositary units [Member] Dividend Declared [Member]	Oct. 02, 2013 American Entertainment Properties Corp. [Member] Railcar Segment [Member]	Oct. 02, 2013 ARL [Member] Railcar Segment [Member]	Oct. 02, 2013 New ARL [Member] Railcar Segment [Member]
Subsequent Event [Line Items]
Distribution declared per depositary unit	$ 1.00	$ 1.25	$ 1.25	$ 1.00
Amount paid for management contract between related parties					$ 21
Cash contribution to newly capitalized entity					279	71
Future planned contribution to newly capitalized entity, percentage					100.00%
Note receivable contribution to newly capitalized entity						171
Percentage of equity ownership in subsidiary							75.00%
Future debt expected to be incurred by new capitalized entity							381
Future cash expected to be distributed by newly capitalized entity							$ 381