Segment Reporting Geographic Information (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended																12 Months Ended
	Dec. 31, 2013		Sep. 30, 2013		Jun. 30, 2013		Mar. 31, 2013		Dec. 31, 2012		Sep. 30, 2012		Jun. 30, 2012		Mar. 31, 2012		Dec. 31, 2013		Dec. 31, 2012		Dec. 31, 2011
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales	$ 4,533	[1]	$ 4,181	[1]	$ 4,497	[1]	$ 4,574	[1]	$ 3,993	[1],[2]	$ 4,486	[1],[2]	$ 3,696	[1],[2]	$ 2,399	[1],[2]	$ 17,785		$ 14,574		$ 9,127
Other revenues from operations																	988		951		933
Property, plant and equipment, net	8,077								7,661								8,077		7,661
United States
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales																	13,171	[3]	10,202	[3]	4,459	[3]
Other revenues from operations																	937	[3]	914	[3]	900	[3]
Property, plant and equipment, net	6,207	[3]							5,959	[3]							6,207	[3]	5,959	[3]
Geographic information, Germany [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales																	1,339	[3]	1,175	[3]	1,302	[3]
Other revenues from operations																	0	[3]	0	[3]	0	[3]
Property, plant and equipment, net	425	[3]							403	[3]							425	[3]	403	[3]
Geographic information, Other [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales																	3,275	[3]	3,197	[3]	3,366	[3]
Other revenues from operations																	51	[3]	37	[3]	33	[3]
Property, plant and equipment, net	$ 1,445	[3]							$ 1,299	[3]							$ 1,445	[3]	$ 1,299	[3]

[1] Amounts for all periods presented differ from each respective Form 10-Q filing due to our acquisition of a controlling interest in New ARL on October 2, 2013, which is an entity under common control and which we consolidated on an as-if-pooling basis.

[2] We consolidated the results of CVR effective May 5, 2012.

[3] Geographic location is based on location of the customer and location of the asset.