Commitments and Contingencies (Details 2) (Naming, promotional and sponsorship agreement, Subsidiary, USD $) In Millions, unless otherwise specified	Dec. 31, 2012
Naming, promotional and sponsorship agreement \| Subsidiary
Commitments and Contingencies
Amount expected to be paid in next year	$ 2.9
Increase in successive annual payment (as a percent)	0.023

Minimum amount of other commitment maturing in the next fiscal year following the latest fiscal year for commitments not otherwise specified in the taxonomy. Excludes commitments explicitly modeled in this taxonomy, including but not limited to, long-term and short-term purchase commitments, recorded and unrecorded purchase obligations, supply commitments, registration payment arrangements, leases, debt, product warranties, guarantees, environmental remediation obligations, and pensions.

No definition available.

Name:	us-gaap_OtherCommitmentDueInNextTwelveMonths
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant