Commitments and Contingencies Loss Contingencies (Details) (USD $) In Millions, unless otherwise specified	Mar. 31, 2014	Dec. 31, 2013
Fox River Site [Member]
Loss Contingencies [Line Items]
Threshold For Environmental Cleanup Costs	$ 75
Portion Of Costs Below Threshold, Percentage	45.00%
Portion Of Costs Exceeding Threshold, Percentage	40.00%
Allocation Litigation Final Judgment	76
Claimed Damages for OU1	95
Estimated Total Clean Up Costs	825
Estimated Federal Government Maximum NRD Costs	382
Net Loss Contingency Accrual	102	112
Fox River LLC Funding Remainder Other Current Asset	0	0
Estimate of Indemnity Asset Due From Related Party	51	51
Total Amount Received from Settlements with Insurance Carriers	173
Portion of Insurance Settlements Subject to Competing Claims	9
Fox River Site [Member] | Minimum [Member]
Loss Contingencies [Line Items]
Estimated Maximum NRD Costs	0
Fox River Site [Member] | Maximum [Member]
Loss Contingencies [Line Items]
Estimated Maximum NRD Costs	246
Kalamazoo River Site [Member]
Loss Contingencies [Line Items]
Alleged Portion Of GP Clean Up Costs	79
API [Member] | Fox River Site [Member]
Loss Contingencies [Line Items]
Accounts Receivable, Gross	$ 84