Equity Based Compensation (Tables)

12 Months Ended

Dec. 31, 2015

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

Disclosure of Share-based Compensation Arrangements by Share-based Payment Award [Table Text Block]

	Number of Options		Weighted-Average Exercise Price		Aggregate Intrinsic Value (in millions)
Outstanding December 31, 2014	2,978,733		$	55.41
Granted	506,344		$	91.65
Exercised	(652,015	)	$	51.43
Forfeited	(7,622	)	$	57.29
Outstanding December 31, 2015	2,825,440		$	62.82	$	81.5
Options exercisable	2,087,712		$	56.12	$	74.2

Schedule of Share-based Compensation, Shares Authorized under Stock Option Plans, by Exercise Price Range [Table Text Block]

	Options Outstanding				Options Exercisable
Range of Exercise Prices	Number Outstanding as of 12/31/2015	Weighted-Average Remaining Contractual Life (years)	Weighted- Average Exercise Price		Number Exercisable as of 12/31/2015	Weighted-Average Exercise Price
$25.00 - $44.99	208,347	3.0	$	32.20	208,347	$	32.20
$45.00 - $54.99	267,249	3.8	$	47.11	267,249	$	47.11
$55.00 +	2,349,844	6.6	$	67.32	1,612,116	$	60.71
Totals	2,825,440	6.1	$	62.82	2,087,712	$	56.12

Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block]

The following table presents the weighted average assumptions used to determine the fair value of stock options issued:

For the years ended December 31,	2015			2014			2013
Dividend yield	1.47		%	1.53		%	1.63		%
Risk-free rate of return	2.04		%	2.27		%	1.36		%
Expected volatility	35.0		%	35.7		%	35.4		%
Expected life (years)	7.0			7.0			6.8
Weighted average exercise price of stock options granted	$	91.65		$	78.48		$	58.77
Weighted average fair value of stock options granted	$	30.05		$	26.76		$	18.58

Schedule of Share-based Compensation, Activity [Table Text Block]

The following table presents a summary of Performance Share and Restricted Stock Unit activity:

	Performance Contingent Units		Restricted Stock Units
Outstanding December 31, 2014	692,663		36,065
Granted	185,783		37,078
Paid	(192,725	)	—
Forfeited	(54,399	)	(2,256	)
Outstanding December 31, 2015	631,322		70,887