Commitments and Contingencies Loss Contingencies (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2015	Dec. 31, 2014
Fox River Site [Member]
Loss Contingencies [Line Items]
Threshold For Environmental Cleanup Costs	$ 75
Allocation Litigation Final Judgment	76
Net Loss Contingency Accrual	39	40
Total Amount Received from Settlements with Insurance Carriers	173
Fox River LLC Funding Remainder Other Current Asset	0
Estimate of Indemnity Asset Due From Related Party	25	30
Portion of Insurance Settlements Subject to Competing Claims	9
Foreign Tax Authority [Member]
Loss Contingencies [Line Items]
Loss Contingency, Damages Sought, Value	52
Loss Contingency, Range of Possible Loss, Minimum	0
Loss Contingency, Range of Possible Loss, Maximum	$ 54