Costs Associated with Rationalization Programs (Details 1) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Restructuring Cost and Reserve [Line Items]
Rationalizations	$ 95	$ 58	$ 175
Asset Write-off and Accelerated Depreciation Charges	7	23	20
Plans Initiated In 2014 [Member]
Restructuring Cost and Reserve [Line Items]
Rationalizations	23
Plans Initiated In 2014 [Member] | Associate Related Costs
Restructuring Cost and Reserve [Line Items]
Rationalizations	22
Plans Initiated In 2014 [Member] | Other Exit Costs And Noncancelable Lease Costs
Restructuring Cost and Reserve [Line Items]
Rationalizations	1
Plans Initiated in 2013 [Member]
Restructuring Cost and Reserve [Line Items]
Rationalizations	72	45
Plans Initiated in 2013 [Member] | Associate Related Costs
Restructuring Cost and Reserve [Line Items]
Rationalizations	49	42
Plans Initiated in 2013 [Member] | Other Exit Costs And Noncancelable Lease Costs
Restructuring Cost and Reserve [Line Items]
Rationalizations	45	3
Plans Initiated in 2012
Restructuring Cost and Reserve [Line Items]
Rationalizations		13	141
Plans Initiated in 2012 | Associate Related Costs
Restructuring Cost and Reserve [Line Items]
Rationalizations		3	125
Plans Initiated in 2012 | Other Exit Costs And Noncancelable Lease Costs
Restructuring Cost and Reserve [Line Items]
Rationalizations		10	16
Plans Initiated In 2011
Restructuring Cost and Reserve [Line Items]
Rationalizations			34
Plans Initiated In 2011 | Associate Related Costs
Restructuring Cost and Reserve [Line Items]
Rationalizations			15
Plans Initiated In 2011 | Other Exit Costs And Noncancelable Lease Costs
Restructuring Cost and Reserve [Line Items]
Rationalizations			19
Plans Initiated In 2011 | Pension Curtailment [Member]
Restructuring Cost and Reserve [Line Items]
Rationalizations			0
Plans Initiated in 2012
Restructuring Cost and Reserve [Line Items]
Rationalizations			74
Plans Initiated in 2012 | Pension Curtailment [Member]
Restructuring Cost and Reserve [Line Items]
Rationalizations		0
Plans Initiated in 2013 [Member] | Pension Curtailment [Member]
Restructuring Cost and Reserve [Line Items]
Rationalizations	$ (22)