Share Incentive Plans (Details 2) (USD $) In Millions, except Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2013
Information regarding options outstanding and exercisable
Options Outstanding, Options	8,470,532
Options Outstanding, Weighted Average Remaining Contractual Life in Years	5 years 7 months 5 days
Options Outstanding, Weighted Average Exercise Price	$ 43.67
Options Exercisable, Options	6,046,489
Options Exercisable, Weighted Average Exercise Price	$ 38.76
Options, Vested and expected to vest	8,293,422
Options, Weighted Average Remaining Contractual Life in Years	5 years 6 months 20 days
Options, Weighted Average Exercise Price	$ 43.42
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Exercisable, Aggregate Intrinsic Value	$ 85.6
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Intrinsic Value	$ 85.5
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Remaining Contractual Term	4 years 6 months 15 days
Exercise Price Range One [Member]
Information regarding options outstanding and exercisable
Options Outstanding, Options	1,235,980
Options Outstanding, Weighted Average Remaining Contractual Life in Years	5 years 0 months 30 days
Options Outstanding, Weighted Average Exercise Price	$ 23.07
Options Exercisable, Options	1,235,980
Options Exercisable, Weighted Average Exercise Price	$ 23.07
Exercise Price Range Two [Member]
Information regarding options outstanding and exercisable
Options Outstanding, Options	386,723
Options Outstanding, Weighted Average Remaining Contractual Life in Years	0 years 28 days
Options Outstanding, Weighted Average Exercise Price	$ 29.25
Options Exercisable, Options	386,723
Options Exercisable, Weighted Average Exercise Price	$ 29.25
Exercise Price Range Three [Member]
Information regarding options outstanding and exercisable
Options Outstanding, Options	1,332,280
Options Outstanding, Weighted Average Remaining Contractual Life in Years	4 years 6 months 28 days
Options Outstanding, Weighted Average Exercise Price	$ 32.61
Options Exercisable, Options	1,332,280
Options Exercisable, Weighted Average Exercise Price	$ 32.61
Exercise Price Range Four [Member]
Information regarding options outstanding and exercisable
Options Outstanding, Options	1,347,487
Options Outstanding, Weighted Average Remaining Contractual Life in Years	3 years 2 months 12 days
Options Outstanding, Weighted Average Exercise Price	$ 40.46
Options Exercisable, Options	1,347,487
Options Exercisable, Weighted Average Exercise Price	$ 40.46
Exercise Price Range Five [Member]
Information regarding options outstanding and exercisable
Options Outstanding, Options	61,187
Options Outstanding, Weighted Average Remaining Contractual Life in Years	6 years 6 months 18 days
Options Outstanding, Weighted Average Exercise Price	$ 48.41
Options Exercisable, Options	23,059
Options Exercisable, Weighted Average Exercise Price	$ 48.06
Exercise Price Range Six [Member]
Information regarding options outstanding and exercisable
Options Outstanding, Options	2,774,770
Options Outstanding, Weighted Average Remaining Contractual Life in Years	6 years 11 months 25 days
Options Outstanding, Weighted Average Exercise Price	$ 53.91
Options Exercisable, Options	1,226,038
Options Exercisable, Weighted Average Exercise Price	$ 53.64
Exercise Price Range Seven [Member]
Information regarding options outstanding and exercisable
Options Outstanding, Options	1,332,105
Options Outstanding, Weighted Average Remaining Contractual Life in Years	8 years 2 months 12 days
Options Outstanding, Weighted Average Exercise Price	$ 59.76
Options Exercisable, Options	494,922
Options Exercisable, Weighted Average Exercise Price	$ 59.98