Consolidated Condensed Statements of Income (Parenthetical) (USD $) In Millions, unless otherwise specified	3 Months Ended	9 Months Ended
Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Consolidated Condensed Statements Of Income [Abstract]
Pension and post-retirement plans expense reclassified from accumulated other comprehensive income	$ 0.9	$ 2.7	$ 2.6	$ 8.1
Income tax benefit reclassified from accumulated other comprehensive income	$ 0.3	$ 1.0	$ 1.0	$ 3.1

Amount before tax of reclassification adjustment from accumulated other comprehensive (income) loss related to net period benefit cost (credit) for pension and other postretirement defined benefit plans.

No definition available.

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