Significant Accounting Policies (Details 3) (Recurring, USD $) In Millions, unless otherwise specified	Jun. 30, 2013	Dec. 31, 2012
Level 1
Fair Value Measurement:
Marketable securities with Level 1 fair value inputs	$ 125.1	$ 170.2
Level 2
Fair Value Measurement:
Interest rate swap agreements and foreign currency forward contracts, gross liability balance	1.0	1.5
Interest rate swap agreements and foreign currency forward contracts, gross asset balance	4.3	3.0
Level 3
Fair Value Measurement:
Investments	$ 0

Fair value of derivative asset, presented on a gross basis even when the derivative instrument is subject to master netting arrangements and qualifies for net presentation in the statement of financial position.

+ References+ Details

Fair value of derivative liability, presented on a gross basis even when the derivative instrument is subject to master netting arrangements and qualifies for net presentation in the statement of financial position.

+ References+ Details

- Definition

This element represents the portion of the balance sheet assertion valued at fair value by the entity whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission. This item represents investment securities as of the balance sheet date which may include marketable securities, derivative financial instruments, and investments accounted for under the equity method.

+ References+ Details

- Definition

Total debt and equity financial instruments including: (1) securities held-to-maturity, (2) trading securities, and (3) securities available-for-sale.

+ References+ Details