Indebtedness	9 Months Ended
Sep. 30, 2012
Debt Disclosure [Abstract]
Indebtedness	Indebtedness Revolving Credit Facility In June 2012 our $360.0 million senior unsecured revolving credit facility expired and was not renewed. No borrowings were made under this credit facility.

- Definition

The entire disclosure for information about short-term and long-term debt arrangements, which includes amounts of borrowings under each line of credit, note payable, commercial paper issue, bonds indenture, debenture issue, own-share lending arrangements and any other contractual agreement to repay funds, and about the underlying arrangements, rationale for a classification as long-term, including repayment terms, interest rates, collateral provided, restrictions on use of assets and activities, whether or not in compliance with debt covenants, and other matters important to users of the financial statements, such as the effects of refinancing and noncompliance with debt covenants.

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