Share-Based Payments (Details 5) - Market stock units - USD ($)	12 Months Ended
	Dec. 31, 2016		Dec. 31, 2015	Dec. 31, 2014
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	0.60%		0.20%	0.10%
Maximum range of risk-free interest rates	0.90%		1.00%	0.70%
Average stock price on grant date minimum	$ 260.67		$ 227.35	$ 280.88
Average stock price on grant date maximum	$ 304.86		$ 426.27	$ 335.65
Weighted average grant date fair value	$ 328.03	[1]	$ 493.43	$ 395.22
Minimum
Assumptions used in valuation of market based stock units
Range of expected stock price volatility	38.20%		31.00%	31.70%
Maximum
Assumptions used in valuation of market based stock units
Range of expected stock price volatility	40.70%		33.20%	35.10%

[1] MSUs granted in 2016 include approximately 15,000 and 20,000 MSUs issued in 2016 based upon the attainment of performance criteria set for 2013 and 2012, respectively, in relation to awards granted in those years. The remainder of MSUs granted during 2016 include awards granted in conjunction with our annual awards made in February 2016 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.