Restructuring Charges (Restructuring Charges) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended				12 Months Ended
	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2014		Dec. 31, 2013	Dec. 31, 2012
Restructuring Cost and Reserve [Line Items]
Restructuring Charges	$ 58	$ 154	$ 59	$ 70	$ 331		$ 0	$ 0
Restructuring Reserve	79				79		0
Corporate and Research and Development [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Charges					31
Restructuring Reserve	12				12
North America [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Charges					74
Restructuring Reserve	33				33
Middle East/North Africa/Asia [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Charges					141
Restructuring Reserve	14				14
Europe/Sub-Sahara Africa/Russia [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Charges					36
Restructuring Reserve	11				11
Latin America [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Charges					49
Restructuring Reserve	9				9
Employee Severance [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Charges					58
Restructuring Reserve	53				53
Employee Severance [Member] | Corporate and Research and Development [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Reserve	1				1
Employee Severance [Member] | North America [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Reserve	32				32
Employee Severance [Member] | Middle East/North Africa/Asia [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Reserve	6				6
Employee Severance [Member] | Europe/Sub-Sahara Africa/Russia [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Reserve	5				5
Employee Severance [Member] | Latin America [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Reserve	9				9
Severance and Other Restructuring Liabilities [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Charges					196
Restructuring Reserve	26				26
Severance and Other Restructuring Liabilities [Member] | Corporate and Research and Development [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Reserve	11				11
Severance and Other Restructuring Liabilities [Member] | North America [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Reserve	1				1
Severance and Other Restructuring Liabilities [Member] | Middle East/North Africa/Asia [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Reserve	8				8
Severance and Other Restructuring Liabilities [Member] | Europe/Sub-Sahara Africa/Russia [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Reserve	6				6
Severance and Other Restructuring Liabilities [Member] | Latin America [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Reserve	0				0
Other Restructuring [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Charges					24
2015 Plan [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Charges					58
Restructuring Reserve	53				53
2015 Plan [Member] | Corporate and Research and Development [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Charges					1
2015 Plan [Member] | North America [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Charges					32
Restructuring Reserve							0
2015 Plan [Member] | Middle East/North Africa/Asia [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Charges					8
2015 Plan [Member] | Europe/Sub-Sahara Africa/Russia [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Charges					5
2015 Plan [Member] | Latin America [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Charges					12
2014 Plan [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Charges					273
Restructuring Reserve							0
2014 Plan [Member] | Corporate and Research and Development [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Charges					30
2014 Plan [Member] | North America [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Charges					42
2014 Plan [Member] | Middle East/North Africa/Asia [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Charges					133
2014 Plan [Member] | Europe/Sub-Sahara Africa/Russia [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Charges					31
2014 Plan [Member] | Latin America [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Charges					37
2014 Plan [Member] | Employee Severance [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Charges					114
2014 Plan [Member] | Employee Severance [Member] | Corporate and Research and Development [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Charges					28
2014 Plan [Member] | Employee Severance [Member] | North America [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Charges					15
2014 Plan [Member] | Employee Severance [Member] | Middle East/North Africa/Asia [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Charges					23
2014 Plan [Member] | Employee Severance [Member] | Europe/Sub-Sahara Africa/Russia [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Charges					18
2014 Plan [Member] | Employee Severance [Member] | Latin America [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Charges					30
2014 Plan [Member] | Severance and Other Restructuring Liabilities [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Charges					138
Restructuring Reserve	26				26		0
2014 Plan [Member] | Asset impairment charges [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Charges					135
2014 Plan [Member] | Asset impairment charges [Member] | Corporate and Research and Development [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Charges					2
2014 Plan [Member] | Asset impairment charges [Member] | North America [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Charges					24
2014 Plan [Member] | Asset impairment charges [Member] | Middle East/North Africa/Asia [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Charges					105
2014 Plan [Member] | Asset impairment charges [Member] | Europe/Sub-Sahara Africa/Russia [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Charges					4
2014 Plan [Member] | Asset impairment charges [Member] | Latin America [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Charges					0
2014 Plan [Member] | Other Restructuring [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Charges					24	[1]
Restructuring Reserve	12				12		0
2014 Plan [Member] | Other Restructuring [Member] | Corporate and Research and Development [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Charges					0
2014 Plan [Member] | Other Restructuring [Member] | North America [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Charges					3
2014 Plan [Member] | Other Restructuring [Member] | Middle East/North Africa/Asia [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Charges					5
2014 Plan [Member] | Other Restructuring [Member] | Europe/Sub-Sahara Africa/Russia [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Charges					9
2014 Plan [Member] | Other Restructuring [Member] | Latin America [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Charges					$ 7

[1] Includes reversal of $5 million severance charges and $2 million facility related charges for the 2014 Plan.