Restructuring Charges (Restructuring Liability) (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 Reserve [Roll Forward]
Accrued balance at beginning of period				$ 0	$ 0
Restructuring Charges	58	154	59	70	331		0	0
Cash Payments					(111)
Other					(6)
Accrued balance at end of period	79				79		0
Corporate and Research and Development [Member]
Restructuring Reserve [Roll Forward]
Restructuring Charges					31
Accrued balance at end of period	12				12
North America [Member]
Restructuring Reserve [Roll Forward]
Restructuring Charges					74
Accrued balance at end of period	33				33
Middle East/North Africa/Asia [Member]
Restructuring Reserve [Roll Forward]
Restructuring Charges					141
Accrued balance at end of period	14				14
Europe/Sub-Sahara Africa/Russia [Member]
Restructuring Reserve [Roll Forward]
Restructuring Charges					36
Accrued balance at end of period	11				11
Latin America [Member]
Restructuring Reserve [Roll Forward]
Restructuring Charges					49
Accrued balance at end of period	9				9
Other Restructuring [Member]
Restructuring Reserve [Roll Forward]
Restructuring Charges					24
Severance and Other Restructuring Liabilities [Member]
Restructuring Reserve [Roll Forward]
Restructuring Charges					196
Cash Payments					(106)
Accrued balance at end of period	26				26
Severance and Other Restructuring Liabilities [Member] | Corporate and Research and Development [Member]
Restructuring Reserve [Roll Forward]
Accrued balance at end of period	11				11
Severance and Other Restructuring Liabilities [Member] | North America [Member]
Restructuring Reserve [Roll Forward]
Accrued balance at end of period	1				1
Severance and Other Restructuring Liabilities [Member] | Middle East/North Africa/Asia [Member]
Restructuring Reserve [Roll Forward]
Accrued balance at end of period	8				8
Severance and Other Restructuring Liabilities [Member] | Europe/Sub-Sahara Africa/Russia [Member]
Restructuring Reserve [Roll Forward]
Accrued balance at end of period	6				6
Severance and Other Restructuring Liabilities [Member] | Latin America [Member]
Restructuring Reserve [Roll Forward]
Accrued balance at end of period	0				0
2015 Plan [Member]
Restructuring Reserve [Roll Forward]
Restructuring Charges					58
Cash Payments					(5)
Other					0
Accrued balance at end of period	53				53
2015 Plan [Member] | Corporate and Research and Development [Member]
Restructuring Reserve [Roll Forward]
Restructuring Charges					1
2015 Plan [Member] | North America [Member]
Restructuring Reserve [Roll Forward]
Accrued balance at beginning of period				0	0
Restructuring Charges					32
2015 Plan [Member] | Middle East/North Africa/Asia [Member]
Restructuring Reserve [Roll Forward]
Restructuring Charges					8
2015 Plan [Member] | Europe/Sub-Sahara Africa/Russia [Member]
Restructuring Reserve [Roll Forward]
Restructuring Charges					5
2015 Plan [Member] | Latin America [Member]
Restructuring Reserve [Roll Forward]
Restructuring Charges					12
2014 Plan [Member]
Restructuring Reserve [Roll Forward]
Accrued balance at beginning of period				0	0
Restructuring Charges					273
2014 Plan [Member] | Corporate and Research and Development [Member]
Restructuring Reserve [Roll Forward]
Restructuring Charges					30
2014 Plan [Member] | North America [Member]
Restructuring Reserve [Roll Forward]
Restructuring Charges					42
2014 Plan [Member] | Middle East/North Africa/Asia [Member]
Restructuring Reserve [Roll Forward]
Restructuring Charges					133
2014 Plan [Member] | Europe/Sub-Sahara Africa/Russia [Member]
Restructuring Reserve [Roll Forward]
Restructuring Charges					31
2014 Plan [Member] | Latin America [Member]
Restructuring Reserve [Roll Forward]
Restructuring Charges					37
2014 Plan [Member] | Employee Severance [Member]
Restructuring Reserve [Roll Forward]
Restructuring Charges					(5)
2014 Plan [Member] | One-time Termination Benefits [Member]
Restructuring Reserve [Roll Forward]
Restructuring Charges					114	[1]
Cash Payments					(94)
Other					(6)
Accrued balance at end of period	14				14
2014 Plan [Member] | Other Restructuring [Member]
Restructuring Reserve [Roll Forward]
Accrued balance at beginning of period				0	0
Restructuring Charges					24	[1]
Cash Payments					(12)
Other					0
Accrued balance at end of period	12				12
2014 Plan [Member] | Other Restructuring [Member] | Corporate and Research and Development [Member]
Restructuring Reserve [Roll Forward]
Restructuring Charges					0
2014 Plan [Member] | Other Restructuring [Member] | North America [Member]
Restructuring Reserve [Roll Forward]
Restructuring Charges					3
2014 Plan [Member] | Other Restructuring [Member] | Middle East/North Africa/Asia [Member]
Restructuring Reserve [Roll Forward]
Restructuring Charges					5
2014 Plan [Member] | Other Restructuring [Member] | Europe/Sub-Sahara Africa/Russia [Member]
Restructuring Reserve [Roll Forward]
Restructuring Charges					9
2014 Plan [Member] | Other Restructuring [Member] | Latin America [Member]
Restructuring Reserve [Roll Forward]
Restructuring Charges					7
2014 Plan [Member] | Severance and Other Restructuring Liabilities [Member]
Restructuring Reserve [Roll Forward]
Accrued balance at beginning of period				0	0
Restructuring Charges					138
Cash Payments					(106)
Other					(6)
Accrued balance at end of period	26				26
2014 Plan [Member] | Facility [Member]
Restructuring Reserve [Roll Forward]
Restructuring Charges					$ (2)

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