Fair Value Measurements (Tables)

12 Months Ended

Dec. 31, 2014

Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]

Financial Assets And Liabilities Carried At Fair Value

A summary of financial assets and liabilities that are measured at fair value on a recurring basis were as follows ($ in millions):

	Quoted Prices in Active Market (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)	Total
December 31, 2014:
Assets:
Available-for-sale securities	$	257.5	—		—	$	257.5
Liabilities:
Deferred compensation plans	—		$	73.1	—	73.1
December 31, 2013:
Assets:
Available-for-sale securities	$	385.2	—		—	$	385.2
Liabilities:
Deferred compensation plans	—		$	68.6	—	68.6

Carrying Amounts And Fair Values Of Financial Instruments

The carrying amounts and fair values of the Company's financial instruments as of December 31 were as follows ($ in millions):

	2014				2013
	Carrying Amount		Fair Value		Carrying Amount		Fair Value
Financial assets:
Available-for-sale securities	$	257.5	$	257.5	$	385.2	$	385.2
Liabilities:
Short-term borrowings	71.9		71.9		62.3		62.3
Long-term borrowings	3,401.5		3,809.1		3,436.7		3,877.6