Subsequent Events (Details) (USD $)	0 Months Ended						3 Months Ended							0 Months Ended		12 Months Ended	1 Months Ended	0 Months Ended		3 Months Ended		1 Months Ended		0 Months Ended			0 Months Ended	12 Months Ended
	Feb. 11, 2013 Common Stock [Member]	Nov. 01, 2013 Common Stock [Member] Limited partners	Aug. 06, 2013 Common Stock [Member] Limited partners	Apr. 29, 2013 Common Stock [Member] Limited partners	Feb. 25, 2014 Dividend Declared [Member] Common Stock [Member] Limited partners	Jan. 24, 2014 2010-2012 Notes [Member] Senior unsecured notes [Member]	Mar. 31, 2014 2010-2012 Notes [Member] Senior unsecured notes [Member]	Jan. 21, 2014 2017 Notes [Member] Senior unsecured notes [Member]	Jan. 15, 2010 2017 Notes [Member] Senior unsecured notes [Member]	Jan. 21, 2014 2019 Notes [Member] Senior unsecured notes [Member]	Jan. 15, 2010 2019 Notes [Member] Senior unsecured notes [Member]	Jan. 29, 2014 Additional 2020 Notes [Member] Senior unsecured notes [Member]	Jan. 21, 2014 Additional 2020 Notes [Member] Senior unsecured notes [Member]	Jan. 29, 2014 2022 Notes [Member] Senior unsecured notes [Member]	Feb. 28, 2007 Railcar Segment [Member] Senior unsecured notes [Member]	Dec. 31, 2013 Railcar Segment [Member] Term Loan [Member]	Jan. 31, 2014 Railcar Segment [Member] ARI Notes due 2020 [Member] Term Loan [Member]	Feb. 25, 2014 Railcar Segment [Member] NCI I Term Loan [Member] Term Loan [Member]	Feb. 21, 2014 Railcar Segment [Member] NCI I Term Loan [Member] Term Loan [Member]	Mar. 31, 2014 Food Packaging Segment [Member] Viskase Senior Secured Notes due 2021 [Member] Secured Debt [Member]	Jan. 30, 2014 Food Packaging Segment [Member] Viskase Senior Secured Notes due 2021 [Member] Secured Debt [Member]	Jan. 31, 2014 Honeywell [Member] Automotive Segment [Member]	Jan. 31, 2014 Affinia [Member] Automotive Segment [Member]	Feb. 24, 2014 New ARL [Member] [Member] Railcar Segment [Member]	Oct. 02, 2013 New ARL [Member] [Member] Railcar Segment [Member]	Jan. 31, 2014 New ARL [Member] [Member] Railcar Segment [Member]	Mar. 03, 2014 Limited partners Dividend Declared [Member] Depositary Units [Member]	Dec. 31, 2013 Limited partners Dividend Declared [Member] Depositary Units [Member]
Subsequent Event [Line Items]
Term Loan Facility								$ 1,175,000,000		$ 1,275,000,000			$ 1,200,000,000	$ 1,350,000,000	$ 275,000,000						$ 275,000,000					$ 385,000,000
Interest rate, long-term debt									3.50%		4.875%	5.875%	6.00%
Proceeds from Issuance of Debt														1,340,000,000
Common Stock, Dividends, Per Share, Declared	$ 1.00	$ 1.25	$ 1.25	$ 1.00	$ 1.50
Distribution Made to Limited Partner, Distributions Declared, Per Unit																												$ 5.00
Future distribution policy amount, annualized, per unit																											$ 6.00
Use of portion of debt proceeds						3,500,000,000
Loss on extinguishment of debt							108,000,000													16,000,000
Payments to Acquire Businesses, Gross																						155,000,000	150,000,000
Proceeds from Issuance of Long-term Debt																	316,000,000	135,000,000	250,000,000
Proceeds from issuance of Long-term debt after proceeds used to refinance prior debt																	122,000,000
Future cash expected to be distributed by newly capitalized entity																								381,000,000	381,000,000
Business combination, potential earn out payment																						5,000,000
Additional borrowing availability																	$ 100,000,000
Debt Instrument, Basis Spread on Variable Rate																2.50%	2.00%	3.70%	2.00%