Stock-Based Incentive Compensation Plans (Option price assumptions used for stock option incentive plans) (Details) - Stock options [Member] - $ / shares	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Assumptions used for stock-based incentive compensation plans [Abstract]
Weighted-average fair value per option granted (in dollars per share)	$ 13.00	$ 12.95	$ 7.39
Dividend yield	1.90%	2.20%	2.40%
Expected volatility	28.00%	33.20%	34.10%
Risk-free interest rate, minimum	1.40%	0.90%	0.60%
Risk-free interest rate, maximum	1.70%	1.80%	0.90%
Expected life (in years)	5 years 6 months	5 years 4 months 24 days	5 years 7 months 6 days