Debt Table (Details) - USD ($) $ in Millions	Jun. 30, 2016	Dec. 31, 2015
Debt Instrument [Line Items]
Debt	$ 12,969	$ 12,594
Automotive Segment [Member]
Debt Instrument [Line Items]
Debt	3,254	3,135
Energy Segment [Member]
Debt Instrument [Line Items]
Debt	1,168	667
Gaming Segment [Member]
Debt Instrument [Line Items]
Debt	288	289
Railcar Segment [Member]
Debt Instrument [Line Items]
Debt	2,426	2,671
Food Packaging Segment [Member]
Debt Instrument [Line Items]
Debt	266	267
Senior unsecured notes [Member] | 2022 Notes [Member]
Debt Instrument [Line Items]
Debt	1,339	1,338
Senior unsecured notes [Member] | 2020 Notes [Member]
Debt Instrument [Line Items]
Debt	1,705	1,706
Senior unsecured notes [Member] | 2019 Notes [Member]
Debt Instrument [Line Items]
Debt	1,271	1,270
Senior unsecured notes [Member] | 2017 Notes [Member]
Debt Instrument [Line Items]
Debt	1,173	1,172
Senior unsecured notes [Member] | Railcar Segment [Member]
Debt Instrument [Line Items]
Debt	2,426	2,671
Debt facilities [Member] | Automotive Segment [Member]
Debt Instrument [Line Items]
Debt	3,239	3,121
Debt facilities [Member] | Energy Segment [Member]
Debt Instrument [Line Items]
Debt	1,120	619
Secured credit facilities [Member] | Gaming Segment [Member]
Debt Instrument [Line Items]
Debt	288	289
Secured credit facilities [Member] | Food Packaging Segment [Member]
Debt Instrument [Line Items]
Debt	266	267
Other Debt Obligations [Member]
Debt Instrument [Line Items]
Debt	$ 142	$ 141