Restructuring Related Activities (Details in Narrative) - USD ($) $ in Millions	12 Months Ended			19 Months Ended	50 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2017	Dec. 31, 2017
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Incurred Cost	$ 95	$ 78	$ 83
Restructuring Charges Incurred to Date					$ 190
Restructuring Charges	37	28	26
Payments for Restructuring	(70)				(341)
Restructuring and Related Cost, Cost Incurred to Date	403			$ 403	403
Restructuring-related Costs Incurred to Date					213
Restructuring Related Expenses	58	50	57
2016 Restructuring Plan [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Charges Incurred to Date				65
Payments for Restructuring	(70)			(97)
Restructuring and Related Cost, Cost Incurred to Date	142			142	142
Restructuring-related Costs Incurred to Date				77
2014 Restructuring plan [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Incurred Cost		47	87
Restructuring Charges Incurred to Date					125
Payments for Restructuring	0				(244)
Restructuring and Related Cost, Cost Incurred to Date	261			261	261
Restructuring-related Costs Incurred to Date					136
Other Restructuring [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Incurred Cost		31	4
Employee Severance [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Incurred Cost	25	19	23
Restructuring Charges Incurred to Date					140
Restructuring Reserve	22	16	29	22	22
Restructuring Charges	25	19	23
Payments for Restructuring	(19)	(32)			(120)
Restructuring Related Expenses	0	0	0
Employee Severance [Member] | 2016 Restructuring Plan [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Charges Incurred to Date				49
Restructuring Reserve	22	16	0	22	22
Restructuring Charges	25	24
Payments for Restructuring	(19)	(8)		(27)
Employee Severance [Member] | 2014 Restructuring plan [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Incurred Cost		24	27
Restructuring Charges Incurred to Date					91
Restructuring Reserve	0	0	29	0	0
Restructuring Charges	0	(5)
Payments for Restructuring	0	(24)			(93)
Employee Severance [Member] | Other Restructuring [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Incurred Cost		5	(4)
Impairment of an asset in value [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Incurred Cost		2	31
Restructuring Charges Incurred to Date					2
Restructuring Charges		2	0
Restructuring Related Expenses		0	31
Impairment of an asset in value [Member] | 2016 Restructuring Plan [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Incurred Cost		0
Restructuring Charges Incurred to Date				0
Impairment of an asset in value [Member] | 2014 Restructuring plan [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Incurred Cost		2	31
Restructuring Charges Incurred to Date					2
Impairment of an asset in value [Member] | Other Restructuring [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Incurred Cost			0
Other Restructuring [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Incurred Cost	18	18	26
Restructuring Charges Incurred to Date					48
Restructuring Charges	12	7	3
Payments for Restructuring	(6)				(87)
Restructuring Related Expenses	6	11	23
Other Restructuring [Member] | 2016 Restructuring Plan [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Charges Incurred to Date				16
Payments for Restructuring	(6)			(10)
Restructuring-related Costs Incurred to Date				8
Other Restructuring [Member] | 2014 Restructuring plan [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Incurred Cost		7	26
Restructuring Charges Incurred to Date					32
Payments for Restructuring	0				(77)
Other Restructuring [Member] | Other Restructuring [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Incurred Cost		11	0
Reduced Depreciation [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Incurred Cost	7	5	3
Restructuring Charges	0	0	0
Restructuring-related Costs Incurred to Date					21
Restructuring Related Expenses	7	5	3
Reduced Depreciation [Member] | 2016 Restructuring Plan [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring-related Costs Incurred to Date				9
Reduced Depreciation [Member] | 2014 Restructuring plan [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Incurred Cost		1	3
Restructuring-related Costs Incurred to Date					12
Reduced Depreciation [Member] | Other Restructuring [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Incurred Cost		4	0
Transfer costs [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Incurred Cost	45	34
Restructuring Charges	0	0
Payments for Restructuring	(45)				(134)
Restructuring-related Costs Incurred to Date					135
Restructuring Related Expenses	45	34
Transfer costs [Member] | 2016 Restructuring Plan [Member]
Restructuring Cost and Reserve [Line Items]
Payments for Restructuring	(45)			(60)
Restructuring-related Costs Incurred to Date				60
Transfer costs [Member] | 2014 Restructuring plan [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Incurred Cost		15
Payments for Restructuring	0				(74)
Restructuring-related Costs Incurred to Date					75
Transfer costs [Member] | Other Restructuring [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Incurred Cost		19
Restructuring Related To Plan [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring-related Costs Incurred to Date					57
Restructuring Related To Plan [Member] | 2014 Restructuring plan [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring-related Costs Incurred to Date					49
Maximum [Member] | 2016 Restructuring Plan [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring plan estimated future cash outflow	300
Restructuring and Related Cost, Expected Cost	325			325	325
Minimum [Member] | 2016 Restructuring Plan [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring plan estimated future cash outflow	250
Restructuring and Related Cost, Expected Cost	275			$ 275	275
Cost of Sales [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Related Expenses	45
Cost of Sales [Member] | Employee Severance [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Related Expenses	0
Cost of Sales [Member] | Impairment of an asset in value [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Related Expenses		0
Cost of Sales [Member] | Other Restructuring [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Related Expenses	0
Cost of Sales [Member] | Reduced Depreciation [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Related Expenses	0
Cost of Sales [Member] | Transfer costs [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Related Expenses	45
Cost of products sold [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Related Expenses		34	31
Cost of products sold [Member] | Employee Severance [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Related Expenses		0	0
Cost of products sold [Member] | Other Restructuring [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Related Expenses		0	0
Cost of products sold [Member] | Reduced Depreciation [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Related Expenses		0	0
Cost of products sold [Member] | Transfer costs [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Related Expenses		34	31
Selling, General and Administrative Expenses [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Related Expenses	13	16	26
Selling, General and Administrative Expenses [Member] | Employee Severance [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Related Expenses	0	0	0
Selling, General and Administrative Expenses [Member] | Impairment of an asset in value [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Related Expenses		0	0
Selling, General and Administrative Expenses [Member] | Other Restructuring [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Related Expenses	6	11	23
Selling, General and Administrative Expenses [Member] | Reduced Depreciation [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Related Expenses	7	5	$ 3
Selling, General and Administrative Expenses [Member] | Transfer costs [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Related Expenses	$ 0	$ 0
Restructuring Related To Plan [Member] | Other Restructuring [Member] | 2014 Restructuring plan [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Incurred Cost					136
Restructuring Plan [Member] | Employee Severance [Member] | 2014 Restructuring plan [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Incurred Cost					91
Restructuring Plan [Member] | Other Restructuring [Member] | 2014 Restructuring plan [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Incurred Cost					$ 34