Share-Based Payments (Details 5) - Market stock units - USD ($)	12 Months Ended
	Dec. 31, 2019		Dec. 31, 2018	Dec. 31, 2017
Assumptions used in valuation of market based stock units
Expected dividend yield	0.00%		0.00%	0.00%
Minimum range of risk-free interest rates	2.50%		1.90%	0.90%
Maximum range of risk-free interest rates	2.50%		2.30%	1.60%
Average stock price on grant date minimum	$ 228.59		$ 279.47	$ 263.18
Average stock price on grant date maximum	$ 331.18		$ 346.76	$ 267.88
Weighted average grant date fair value	$ 378.08	[1]	$ 378.85	$ 382.59
Minimum
Assumptions used in valuation of market based stock units
Range of expected stock price volatility	31.20%		27.50%	33.00%
Maximum
Assumptions used in valuation of market based stock units
Range of expected stock price volatility	33.60%		32.40%	35.60%

[1] MSUs granted during 2019 include awards granted in conjunction with our annual awards made in February 2019 and MSUs granted in conjunction with the hiring of employees. These grants reflect the target number of shares eligible to be earned at the time of grant. MSUs granted in 2019 also reflect an adjustment based upon the final performance multiplier in relation to shares granted in 2018, 2017 and 2016.