Restructuring Related Activities (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended		23 Months Ended	50 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2015	Dec. 31, 2014	Mar. 31, 2014
Restructuring and Related Cost [Line Items]
Restructuring Charges Incurred to Date						$ 361
Restructuring-related Costs Incurred to Date						129
Estimated costs of restructuring program by major type of cost
Restructuring and Related Cost, Cost Incurred to Date	$ 490		$ 490		$ 490	490
Payments for Restructuring	(20)		(66)			(446)
Restructuring Related Expenses	14	$ 15	42	$ 33
Restructuring and Related Cost, Incurred Cost	21	17	58	70
Restructuring Charges	7	2	16	37
2014 Restructuring plan [Member]
Restructuring and Related Cost [Line Items]
Restructuring Charges Incurred to Date					114
Restructuring-related Costs Incurred to Date					90
Estimated costs of restructuring program by major type of cost
Restructuring and Related Cost, Cost Incurred to Date	204		204		204	204
Payments for Restructuring	(20)		(66)		(159)
Restructuring and Related Cost, Incurred Cost		16	62	66
2011 Restructuring Plan [Member]
Restructuring and Related Cost [Line Items]
Restructuring Charges Incurred to Date						247
Restructuring-related Costs Incurred to Date						39
Estimated costs of restructuring program by major type of cost
Expected total costs associated with the plan	286		286		286	286
Restructuring and Related Cost, Cost Incurred to Date	286		286		286	286
Payments for Restructuring	0		0			(287)
Restructuring and Related Cost, Incurred Cost		1	4	4
Termination Benefits [Member]
Restructuring and Related Cost [Line Items]
Restructuring Reserve	32		32		32	32	$ 43
Restructuring Charges Incurred to Date						221
Estimated costs of restructuring program by major type of cost
Payments for Restructuring	(6)		(24)			(188)
Restructuring Related Expenses	0	0	0	0
Restructuring and Related Cost, Incurred Cost	5	0	13	19
Restructuring Charges	5	0	13	19
Termination Benefits [Member] | 2014 Restructuring plan [Member]
Restructuring and Related Cost [Line Items]
Restructuring Reserve	32		32		32	32	39
Restructuring Charges Incurred to Date					86
Estimated costs of restructuring program by major type of cost
Payments for Restructuring	(6)		(24)		(55)
Restructuring and Related Cost, Incurred Cost		(1)	17	18
Restructuring Charges			17
Termination Benefits [Member] | 2011 Restructuring Plan [Member]
Restructuring and Related Cost [Line Items]
Restructuring Reserve	0		0		0	0	4
Restructuring Charges Incurred to Date						135
Estimated costs of restructuring program by major type of cost
Payments for Restructuring	0		0			(133)
Restructuring and Related Cost, Incurred Cost		1	(4)	1
Restructuring Charges			(4)
Accelerated depreciation [Member]
Restructuring and Related Cost [Line Items]
Restructuring-related Costs Incurred to Date						13
Estimated costs of restructuring program by major type of cost
Restructuring Related Expenses	1	1	3	3
Restructuring and Related Cost, Incurred Cost	1	1	3	3
Restructuring Charges	0	0	0	0
Accelerated depreciation [Member] | 2014 Restructuring plan [Member]
Restructuring and Related Cost [Line Items]
Restructuring-related Costs Incurred to Date					8
Estimated costs of restructuring program by major type of cost
Restructuring and Related Cost, Incurred Cost		1	3	3
Accelerated depreciation [Member] | 2011 Restructuring Plan [Member]
Restructuring and Related Cost [Line Items]
Restructuring-related Costs Incurred to Date						5
Estimated costs of restructuring program by major type of cost
Restructuring and Related Cost, Incurred Cost		0	0	0
Transfer costs [Member]
Restructuring and Related Cost [Line Items]
Restructuring-related Costs Incurred to Date						45
Estimated costs of restructuring program by major type of cost
Payments for Restructuring	(5)		(20)			(45)
Restructuring Related Expenses	5	9	20	15
Restructuring and Related Cost, Incurred Cost	5	9	20	15
Restructuring Charges	0	0	0	0
Transfer costs [Member] | 2014 Restructuring plan [Member]
Restructuring and Related Cost [Line Items]
Restructuring-related Costs Incurred to Date					45
Estimated costs of restructuring program by major type of cost
Payments for Restructuring	(5)		(20)		(45)
Restructuring and Related Cost, Incurred Cost		9	20	15
Transfer costs [Member] | 2011 Restructuring Plan [Member]
Restructuring and Related Cost [Line Items]
Restructuring-related Costs Incurred to Date						0
Estimated costs of restructuring program by major type of cost
Payments for Restructuring	0		0			0
Restructuring and Related Cost, Incurred Cost		0	0	0
Impairment of an asset in value [Member]
Restructuring and Related Cost [Line Items]
Restructuring Charges Incurred to Date						(1)
Impairment of an asset in value [Member] | 2014 Restructuring plan [Member]
Restructuring and Related Cost [Line Items]
Restructuring Charges Incurred to Date					0
Impairment of an asset in value [Member] | 2011 Restructuring Plan [Member]
Restructuring and Related Cost [Line Items]
Restructuring Charges Incurred to Date						(1)
Other [Member]
Restructuring and Related Cost [Line Items]
Restructuring Reserve	5		5		5	5	$ 6
Restructuring Charges Incurred to Date						141
Restructuring-related Costs Incurred to Date						71
Estimated costs of restructuring program by major type of cost
Payments for Restructuring	(9)		(22)			(213)
Restructuring Related Expenses	8	5	19	15
Restructuring and Related Cost, Incurred Cost	10	7	22	33
Restructuring Charges	2	2	3	18
Other [Member] | 2014 Restructuring plan [Member]
Restructuring and Related Cost [Line Items]
Restructuring Charges Incurred to Date					28
Restructuring-related Costs Incurred to Date					37
Estimated costs of restructuring program by major type of cost
Payments for Restructuring	(9)		(22)		(59)
Restructuring and Related Cost, Incurred Cost		7	22	30
Other [Member] | 2011 Restructuring Plan [Member]
Restructuring and Related Cost [Line Items]
Restructuring Charges Incurred to Date						113
Restructuring-related Costs Incurred to Date						34
Estimated costs of restructuring program by major type of cost
Payments for Restructuring	0		0			(154)
Restructuring and Related Cost, Incurred Cost		0	0	3
Restructuring Plan [Member] | Termination Benefits [Member] | 2011 Restructuring Plan [Member]
Estimated costs of restructuring program by major type of cost
Expected total costs associated with the plan	135		135		135	135
Restructuring Plan [Member] | Other [Member] | 2011 Restructuring Plan [Member]
Estimated costs of restructuring program by major type of cost
Expected total costs associated with the plan	112		112		112	112
Restructuring Related To Plan [Member] | Other [Member] | 2011 Restructuring Plan [Member]
Estimated costs of restructuring program by major type of cost
Expected total costs associated with the plan	39		39		39	39
Minimum [Member] | 2014 Restructuring plan [Member]
Estimated costs of restructuring program by major type of cost
Expected total costs associated with the plan	250		250		250	250
Restructuring plan estimated future cash outflow	235
Minimum [Member] | Restructuring Plan [Member] | Termination Benefits [Member] | 2014 Restructuring plan [Member]
Estimated costs of restructuring program by major type of cost
Expected total costs associated with the plan	115		115		115	115
Minimum [Member] | Restructuring Plan [Member] | Other [Member] | 2014 Restructuring plan [Member]
Estimated costs of restructuring program by major type of cost
Expected total costs associated with the plan	25		25		25	25
Minimum [Member] | Restructuring Related To Plan [Member] | Other [Member] | 2014 Restructuring plan [Member]
Estimated costs of restructuring program by major type of cost
Expected total costs associated with the plan	110		110		110	110
Maximum [Member] | 2014 Restructuring plan [Member]
Estimated costs of restructuring program by major type of cost
Expected total costs associated with the plan	300		300		300	300
Restructuring plan estimated future cash outflow	285
Maximum [Member] | 2011 Restructuring Plan [Member]
Estimated costs of restructuring program by major type of cost
Restructuring and Related Cost, Cost Incurred to Date								$ 53
Maximum [Member] | Restructuring Plan [Member] | Termination Benefits [Member] | 2014 Restructuring plan [Member]
Estimated costs of restructuring program by major type of cost
Expected total costs associated with the plan	135		135		135	135
Maximum [Member] | Restructuring Plan [Member] | Other [Member] | 2014 Restructuring plan [Member]
Estimated costs of restructuring program by major type of cost
Expected total costs associated with the plan	35		35		35	35
Maximum [Member] | Restructuring Related To Plan [Member] | Other [Member] | 2014 Restructuring plan [Member]
Estimated costs of restructuring program by major type of cost
Expected total costs associated with the plan	130		130		$ 130	$ 130
Cost of products sold [Member]
Estimated costs of restructuring program by major type of cost
Restructuring Related Expenses	5	9	20	15
Cost of products sold [Member] | Termination Benefits [Member]
Estimated costs of restructuring program by major type of cost
Restructuring Related Expenses	0	0	0	0
Cost of products sold [Member] | Accelerated depreciation [Member]
Estimated costs of restructuring program by major type of cost
Restructuring Related Expenses	0	0	0	0
Cost of products sold [Member] | Transfer costs [Member]
Estimated costs of restructuring program by major type of cost
Restructuring Related Expenses	5	9	20	15
Cost of products sold [Member] | Other [Member]
Estimated costs of restructuring program by major type of cost
Restructuring Related Expenses	0	0	0	0
Selling, General and Administrative Expenses [Member]
Estimated costs of restructuring program by major type of cost
Restructuring Related Expenses	9	6	22	18
Selling, General and Administrative Expenses [Member] | Termination Benefits [Member]
Estimated costs of restructuring program by major type of cost
Restructuring Related Expenses	0	0	0	0
Selling, General and Administrative Expenses [Member] | Accelerated depreciation [Member]
Estimated costs of restructuring program by major type of cost
Restructuring Related Expenses	1	1	3	3
Selling, General and Administrative Expenses [Member] | Transfer costs [Member]
Estimated costs of restructuring program by major type of cost
Restructuring Related Expenses	0	0	0	0
Selling, General and Administrative Expenses [Member] | Other [Member]
Estimated costs of restructuring program by major type of cost
Restructuring Related Expenses	$ 8	$ 5	$ 19	$ 15