Business Segment Information Business Segment Information (Restructuring Costs) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013
Restructuring Cost and Reserve [Line Items]
Restructuring costs	$ 110
Paid in cash	25
Non-cash portion	46
Remaining accrual	39
Implementation Costs [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring costs	19
Paid in cash	19
Non-cash portion	0
Remaining accrual	0
Employee Severance [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring costs	45
Paid in cash	6
Non-cash portion	0
Remaining accrual	39
Benefits Related Costs [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring costs	26
Paid in cash	0
Non-cash portion	26
Remaining accrual	0
Property, Plant, and Equipment Impairments [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring costs	20
Paid in cash	0
Non-cash portion	20
Remaining accrual	$ 0