Share-Based Incentive Plan (Stock Awards) (Details)	9 Months Ended
	Sep. 30, 2015 $ / shares shares
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Number of shares under stock awards, outstanding at beginning of period | shares	16,207,777
Weighted average exercise price per share, outstanding at beginning of period	$ 33.21
Number of shares under stock awards granted | shares	555,558
Weighted average exercise price per share, granted	$ 59.20
Number of shares under stock awards, exercised | shares	(4,892,485)
Weighted average exercise price per share, exercised	$ 22.28
Number of shares under stock awards, forfeited | shares	(163,692)
Weighted average exercise price per share, forfeited	$ 45.50
Number of shares under stock awards converted | shares	(4,100,000)
Weighted average exercise price per share, converted	$ 53.33
Number of shares under stock awards, outstanding at end of period | shares	7,607,158
Weighted average exercise price per share, outstanding at end of period	$ 31.01
Number of shares under stock awards, vested and expected to vest at end of period | shares	7,260,973
Weighted average exercise price per share, vested and expected to vest at end of period	$ 30.24
Number of shares under stock awards, options exercisable at end of period | shares	5,208,129
Weighted average exercise price per share, options exercisable at end of period	$ 23.11