Stock-Based Compensation (Stock-Option Rollforward) (Details)	12 Months Ended
	Dec. 31, 2015 $ / shares shares
Options activity, Shares [Roll Forward]
Outstanding (shares), beginning balance | shares	15,634,317
Granted (shares) | shares	1,885,683
Exercised (shares) | shares	(5,723,239)
Forfeited or expired (shares) | shares	(491,726)
Outstanding (shares), ending balance | shares	11,305,035
Stock options exercisable (shares) | shares	6,199,611
Weighted average exercise price of options outstanding [Abstract]
Outstanding, beginning balance | $ / shares	$ 33.12
Granted | $ / shares	59.41
Exercised | $ / shares	24.88
Forfeited or expired | $ / shares	31.60
Outstanding, ending balance | $ / shares	41.75
Stock options exercisable | $ / shares	$ 31.40