Segment Information - Concentration (Details) - Revenue - Product concentration risk	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Details on the percentage of revenue for each group of similar products sold or services provided in segments
Percentage of revenue	100.00%	100.00%	100.00%	100.00%
Medical Equipment Solutions
Details on the percentage of revenue for each group of similar products sold or services provided in segments
Percentage of revenue	63.30%	66.00%	64.30%	66.90%
Medical Equipment Solutions | Equipment usage solutions
Details on the percentage of revenue for each group of similar products sold or services provided in segments
Percentage of revenue	60.10%	60.90%	61.20%	61.60%
Medical Equipment Solutions | Equipment/disposable sales
Details on the percentage of revenue for each group of similar products sold or services provided in segments
Percentage of revenue	3.20%	5.10%	3.10%	5.30%
Clinical Engineering Solutions | Service solutions
Details on the percentage of revenue for each group of similar products sold or services provided in segments
Percentage of revenue	22.10%	20.20%	21.80%	20.10%
Surgical Services
Details on the percentage of revenue for each group of similar products sold or services provided in segments
Percentage of revenue	14.60%	13.80%	13.90%	13.00%
Surgical Services | Equipment usage solutions
Details on the percentage of revenue for each group of similar products sold or services provided in segments
Percentage of revenue	14.40%	13.60%	13.70%	12.80%
Surgical Services | Equipment/disposable sales
Details on the percentage of revenue for each group of similar products sold or services provided in segments
Percentage of revenue	0.20%	0.20%	0.20%	0.20%