Share-Based Compensation Plans (Narrative) (Details)	3 Months Ended
	Mar. 31, 2016 $ / shares shares
Restricted Shares [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options, granted | shares	155,710
Share-based compensation awards, per option fair value | $ / shares	$ 186.015
Performance Shares [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options, granted | shares	11,130
Share-based compensation awards, per option fair value | $ / shares	$ 186.015