Significant Risks And Uncertainties - Additional Information (Detail)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Vizient | Minimum
Unusual Risk or Uncertainty [Line Items]
Customer revenue as a percentage of net revenue	37.00%	40.00%
Vizient | Maximum
Unusual Risk or Uncertainty [Line Items]
Customer revenue as a percentage of net revenue	40.00%	37.00%
Premier | Minimum
Unusual Risk or Uncertainty [Line Items]
Customer revenue as a percentage of net revenue	19.00%	19.00%
Premier | Maximum
Unusual Risk or Uncertainty [Line Items]
Customer revenue as a percentage of net revenue	21.00%	21.00%
HPG | Minimum
Unusual Risk or Uncertainty [Line Items]
Customer revenue as a percentage of net revenue	13.00%	13.00%
HPG | Maximum
Unusual Risk or Uncertainty [Line Items]
Customer revenue as a percentage of net revenue	14.00%	14.00%