Geographic Information Schedule of Net Property by Country (Details) (USD $) In Millions, unless otherwise specified	Dec. 31, 2014		Dec. 31, 2013		Dec. 31, 2012
Net Property by Country [Line Items]
Net Property	$ 13,386	[1]	$ 12,993	[1]	$ 12,741	[1]
Geographic information threshold	2.00%		2.00%		2.00%
UNITED STATES
Net Property by Country [Line Items]
Net Property	8,905	[1]	8,598	[1]	8,512	[1]
CANADA
Net Property by Country [Line Items]
Net Property	152	[1]	142	[1]	149	[1]
Denmark [Member]
Net Property by Country [Line Items]
Net Property	242	[1]	280	[1]	320	[1]
FRANCE
Net Property by Country [Line Items]
Net Property	253	[1]	269	[1]	243	[1]
SPAIN
Net Property by Country [Line Items]
Net Property	251	[1]	270	[1]	269	[1]
NETHERLANDS
Net Property by Country [Line Items]
Net Property	306	[1]	308	[1]	289	[1]
Europe, Middle East, and Africa, Other [Member]
Net Property by Country [Line Items]
Net Property	1,180	[1]	1,255	[1]	1,182	[1]
Europe, Middle East, and Africa [Member]
Net Property by Country [Line Items]
Net Property	2,232	[1],[2]	2,382	[1],[2]	2,303	[1],[2]
CHINA
Net Property by Country [Line Items]
Net Property	348	[1]	356	[1]	423	[1]
Asia Pacific, Other [Member]
Net Property by Country [Line Items]
Net Property	634	[1]	638	[1]	624	[1]
Asia Pacific [Member]
Net Property by Country [Line Items]
Net Property	982	[1]	994	[1]	1,047	[1]
BRAZIL
Net Property by Country [Line Items]
Net Property	415	[1]	394	[1]	348	[1]
MEXICO
Net Property by Country [Line Items]
Net Property	601	[1]	421	[1]	307	[1]
Latin America, Other [Member]
Net Property by Country [Line Items]
Net Property	99	[1]	62	[1]	75	[1]
Latin America [Member]
Net Property by Country [Line Items]
Net Property	$ 1,115	[1]	$ 877	[1]	$ 730	[1]

[1] Net property is presented for locations with greater than two percent of the total and includes property, plant and equipment less accumulated depreciation.

[2] Europe, Middle East, and Africa (EMEA).