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Equity Based Compensation (Tables)
 12 Months Ended
Dec. 31, 2020
Share-based Payment Arrangement [Abstract]  
Disclosure of Share-based Compensation Arrangements by Share-based Payment Award [Table Text Block]
The following table presents a summary of stock option and SAR activity:
  
Number of Options and SARsWeighted-Average Exercise/Conversion PriceAggregate Intrinsic Value (in millions)
Outstanding at December 31, 20192,031,797 $92.63 
Granted455,455 $117.96 
Exercised(312,345)$61.70 
Forfeited(6,512)$126.50 
Outstanding at December 31, 20202,168,395 $102.30 $43.5 
Awards exercisable1,695,704 $95.68 $43.5 
Share-based Payment Arrangement, Option, Exercise Price Range [Table Text Block]
 Awards OutstandingAwards Exercisable
Range of Exercise PricesNumber Outstanding as
of 12/31/2020		Weighted-Average
Remaining
Contractual Life (years)		Weighted-
Average Exercise
Price		Number
Exercisable as of
12/31/2020		Weighted-Average
Exercise Price
$50.00 - $89.99
503,239 2.0$62.41 503,239 $62.41 
$90.00 - $99.99
711,645 4.8$92.55 711,645 $92.55 
$100.00 - $139.99
608,599 8.4$120.90 269,284 $124.74 
$140.00 +
344,912 7.7$147.80 211,536 $148.37 
Totals2,168,395 5.6$102.30 1,695,704 $95.68 
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 SARs issued:
For the years ended December 31,202020192018
Dividend yield2.37 %1.65 %1.33 %
Risk-free rate of return0.69 %2.67 %2.79 %
Expected volatility18.8 %18.2 %21.4 %
Expected life (years)7.06.07.0
Weighted average exercise price of stock options granted$117.85 $145.25 $150.87 
Weighted average fair value of stock options granted$15.14 $26.59 $36.31 
Share-based Payment Arrangement, 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 at December 31, 2019325,851 62,194 
Granted175,047 37,135 
Change in units based on performance factor(67,847)— 
Paid(138,785)(20,232)
Forfeited(3,137)(2,707)
Outstanding at December 31, 2020 (1)
291,129 76,390 
(1)Amount outstanding at December 31, 2020, includes the amount of shares to be issued under RSUs expected to vest and number of shares to be issued under PCUs at target performance. The PCU amount of shares do not reflect potential increases or decreases that may result from the performance factor, except for the 2018 – 2020 PCU grants, which vested as of December 31, 2020.