Commitments and Contingencies Purchase Obligations (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
Dec. 31, 2013
Commitments and Contingencies Disclosure [Abstract]
Long-term Purchase Commitment, Amount	$ 66

The minimum amount the entity agreed to spend under the long-term purchase commitment.

No definition available.

Name:	us-gaap_LongTermPurchaseCommitmentAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration