Share-Based Compensation (Narrative) (Details)	9 Months Ended
	Sep. 30, 2015 $ / shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shareholder, weighting	25.00%
Performance based, restricted stock unit
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Revenue, weighting	37.50%
Earnings per share, weighting	37.50%
Weighted average fair value of PSUs	$ 122.90
Minimum | Performance based, restricted stock unit
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage of shares issued	0.00%
Maximum | Performance based, restricted stock unit
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage of shares issued	200.00%