Short-Term Borrowings (Tables)
 12 Months Ended
Dec. 31, 2015
Short-term Debt [Abstract]  
Schedule Of Short-Term Borrowings
At December 31, (in millions)
2015
 
2014
Credit facility borrowings, weighted average interest rate of 1.28% at December 31, 2015
$
15.0

 
$
—