Fair Value Measurements (Tables)

12 Months Ended

Dec. 31, 2015

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, 2015:
Assets:
Available-for-sale securities	$	342.3	$	—	$	—	$	342.3
Liabilities:
Deferred compensation plans	—		77.4		—		77.4
December 31, 2014:
Assets:
Available-for-sale securities	$	257.5	$	—	$	—	$	257.5
Liabilities:
Deferred compensation plans	—		73.1		—		73.1

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):

	2015				2014
	Carrying Amount		Fair Value		Carrying Amount		Fair Value
Assets:
Available-for-sale securities	$	342.3	$	342.3	$	257.5	$	257.5
Liabilities:
Short-term borrowings	845.2		845.2		71.9		71.9
Long-term borrowings	12,025.2		12,471.4		3,401.5		3,809.1