Restructuring Related Activities (Details in Narrative) - USD ($) $ in Millions	12 Months Ended			26 Months Ended	53 Months Ended	84 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2015	Dec. 31, 2015	Dec. 31, 2015
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Incurred Cost	$ 83	$ 117	$ 124
Restructuring Charges Incurred to Date						$ 372
Restructuring Charges	26	69	101
Payments for Restructuring	95					476
Restructuring and Related Cost, Cost Incurred to Date	515			$ 515	$ 515	515
Restructuring Related Expenses	57	48	23
Restructuring-related Costs Incurred to Date						143
Proceeds on disposals of property, plant and equipment	0	0	53
2014 Restructuring plan [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Incurred Cost		113	30
Restructuring Charges Incurred to Date				125
Payments for Restructuring	95			189
Restructuring and Related Cost, Cost Incurred to Date	229			229	229	229
Restructuring-related Costs Incurred to Date				104
2011 Restructuring Plan [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Incurred Cost		4	100
Restructuring Charges Incurred to Date					247
Payments for Restructuring	0				287
Restructuring and Related Cost, Cost Incurred to Date	286			286	286	286
Restructuring-related Costs Incurred to Date					39
Other Restructuring [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Incurred Cost	26	46	76
Restructuring Charges Incurred to Date						142
Restructuring Reserve	3	6		3	3	3
Restructuring Charges	3	27	56
Payments for Restructuring	27					219
Restructuring Related Expenses	23	19	20
Other Restructuring [Member] | 2014 Restructuring plan [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Incurred Cost	26	43	1
Restructuring Charges Incurred to Date				29
Payments for Restructuring	27			65
Other Restructuring [Member] | 2011 Restructuring Plan [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Incurred Cost	0	$ 3	$ 75
Restructuring Charges Incurred to Date					113
Payments for Restructuring	0				154
Maximum [Member] | 2014 Restructuring plan [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring plan estimated future cash outflow	255
Restructuring and Related Cost, Expected Cost	270			270	270	270
Minimum [Member] | 2014 Restructuring plan [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring plan estimated future cash outflow	240
Restructuring and Related Cost, Expected Cost	255			255	255	255
Restructuring Plan [Member] | 2011 Restructuring Plan [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Expected Cost	286			286	286	286
Restructuring Plan [Member] | Other Restructuring [Member] | 2011 Restructuring Plan [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Expected Cost	112			112	112	112
Restructuring Plan [Member] | Maximum [Member] | Other Restructuring [Member] | 2014 Restructuring plan [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Expected Cost	35			35	35	35
Restructuring Plan [Member] | Minimum [Member] | Other Restructuring [Member] | 2014 Restructuring plan [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Expected Cost	$ 30			$ 30	$ 30	$ 30