Junior Subordinated Debentures (Junior Subordinated Debentures)	12 Months Ended
	Dec. 31, 2013
Junior Subordinated Debentures
Debt Instrument [Line Items]
Junior Subordinated Debentures	Junior Subordinated Debentures In 2013, the Company issued $350,000,000 aggregate principal amount of 5.625% Subordinated Debentures due April 2053 (the “Debentures”). At December 31, 2013, the carrying value of the Debentures, net of unamortized discount, was $339,800,000. The net proceeds of the offering was primarily used to repay the $250 million aggregate principal amount of the Company's 6.750% Subordinated Debentures due 2045. The Company realized a loss from the early redemption of $7 million.

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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