Restructuring Related Activities (Details in Narrative) (USD $) In Millions, unless otherwise specified	12 Months Ended			72 Months Ended	15 Months Ended	41 Months Ended	59 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2014	Dec. 31, 2014	Dec. 31, 2014	Dec. 31, 2014
Restructuring Cost and Reserve [Line Items]
Restructuring Charges Incurred to Date				$ 526
Restructuring Charges	69	101	136
Payments for Restructuring	112			628
Restructuring and Related Cost, Cost Incurred to Date	717			717	717	717	717
Restructuring Related Expenses	48	23	24
Restructuring-related Costs Incurred to Date				191
2014 Restructuring plan [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Charges Incurred to Date					94
Payments for Restructuring	93
Restructuring and Related Cost, Cost Incurred to Date	142			142	142	142	142
Restructuring-related Costs Incurred to Date					48
2011 Restructuring Plan [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Charges Incurred to Date						250
Payments for Restructuring	19					287
Restructuring and Related Cost, Cost Incurred to Date	289			289	289	289	289
Restructuring-related Costs Incurred to Date						39
2010 Restructuring Plan [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Charges Incurred to Date							152
Payments for Restructuring	0						145
Restructuring and Related Cost, Cost Incurred to Date	160			160	160	160	160
Restructuring and Related Cost, Expected Cost	160			160	160	160	160
Restructuring-related Costs Incurred to Date							8
Plant Network Optimization [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Charges Incurred to Date				30
Payments for Restructuring	0			103
Restructuring and Related Cost, Cost Incurred to Date	126			126	126	126	126
Restructuring and Related Cost, Expected Cost	126			126	126	126	126
Restructuring-related Costs Incurred to Date				96
Other Restructuring [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Charges Incurred to Date				189
Restructuring Reserve	6	8		6	6	6	6
Restructuring Charges	27	56	43
Payments for Restructuring	48			247
Restructuring Related Expenses	19	20	14
Other Restructuring [Member] | 2014 Restructuring plan [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Charges Incurred to Date					25
Payments for Restructuring	38				38
Other Restructuring [Member] | 2011 Restructuring Plan [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Charges Incurred to Date						113
Payments for Restructuring	10					154
Other Restructuring [Member] | 2010 Restructuring Plan [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Charges Incurred to Date							51
Payments for Restructuring	0						55
Other Restructuring [Member] | Plant Network Optimization [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Charges Incurred to Date				0
Payments for Restructuring	0			0
Maximum [Member] | 2014 Restructuring plan [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring plan estimated future cash outflow	285
Restructuring and Related Cost, Expected Cost	300			300	300	300	300
Maximum [Member] | 2011 Restructuring Plan [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring plan estimated future cash outflow	291
Restructuring and Related Cost, Expected Cost	292			292	292	292	292
Minimum [Member] | 2014 Restructuring plan [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring plan estimated future cash outflow	235
Restructuring and Related Cost, Expected Cost	250			250	250	250	250
Minimum [Member] | 2011 Restructuring Plan [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring plan estimated future cash outflow	287
Restructuring and Related Cost, Expected Cost	289			289	289	289	289
Minimum [Member] | Plant Network Optimization [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Expected Cost	$ 126			$ 126	$ 126	$ 126	$ 126