Equity Based Compensation (Tables)

12 Months Ended

Dec. 31, 2016

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, 2015	2,825,440		$	62.82
Granted	329,345		$	93.53
Exercised	(577,071	)	$	54.06
Forfeited	(4,491	)	$	71.21
Outstanding December 31, 2016	2,573,223		$	68.70	$	147.0
Options exercisable	1,888,577		$	60.43	$	123.5

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 12/31/2016	Weighted-Average Remaining Contractual Life (years)	Weighted- Average Exercise Price		Number Exercisable as of 12/31/2016	Weighted-Average Exercise Price
$0.00 - $49.99	307,889	2.5	$	40.35	307,889	$	40.35
$50.00 - $59.99	1,224,805	4.9	$	58.11	1,224,805	$	58.11
$60.00 - $69.99	839	6.0	$	60.24	839	$	60.24
$70.00 - $79.99	211,708	7.0	$	78.48	154,393	$	78.48
$90.00 +	827,982	8.7	$	92.41	200,651	$	91.48
Totals	2,573,223	6.0	$	68.70	1,888,577	$	60.43

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,	2016			2015			2014
Dividend yield	1.58		%	1.47		%	1.53		%
Risk-free rate of return	1.69		%	2.04		%	2.27		%
Expected volatility	28.1		%	35.0		%	35.7		%
Expected life (years)	7.0			7.0			7.0
Weighted average exercise price of stock options granted	$	93.53		$	91.65		$	78.48
Weighted average fair value of stock options granted	$	24.52		$	30.05		$	26.76

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, 2015	631,322		70,887
Granted	206,550		28,995
Paid	(94,436	)	—
Forfeited	(157,465	)	(3,254	)
Outstanding December 31, 2016	585,971		96,628