Supplemental Guarantor Financial Information - Condensed Consolidating Balance Sheets (Details) - USD ($) $ in Millions	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Current Assets
Cash and cash equivalents	$ 219.7	$ 113.7	$ 129.5	$ 149.0
Accounts receivable, net	203.0	188.5
Inventories	91.1	80.7
Prepaid and other current assets	14.4	16.6
Assets held for sale	632.5	194.0
Total Current Assets	1,160.7	593.5
Property, Plant and Equipment, Net	109.9	109.3
Investment in Consolidated Subsidiaries	0.0	0.0
Goodwill	764.7	762.3	678.4
Other Intangible Assets, net	148.9	168.2
Other Assets	11.7	11.6
Assets held for sale	0.0	426.9
TOTAL ASSETS	2,195.9	2,071.8
Current Liabilities
Current portion of long-term debt	39.8	0.0
Trade accounts payable	171.2	160.6
Accrued expenses	144.9	138.4
Liabilities held for sale	33.9	25.4
Total Current Liabilities	389.8	324.4
Long-Term Debt	541.1	579.0
Other Long-Term Liabilities	49.6	59.2
Liabilities held for sale	0.0	6.7
Total Liabilities	980.5	969.3
Total Equity	1,215.4	1,102.5	1,055.3	1,491.2
TOTAL LIABILITIES AND STOCKHOLDERS’ EQUITY	2,195.9	2,071.8
Eliminations
Current Assets
Cash and cash equivalents	0.0	0.0	(2.5)	0.0
Accounts receivable, net	(687.4)	(607.0)
Inventories	0.0	0.0
Prepaid and other current assets	0.0	(0.3)
Assets held for sale	0.0	0.0
Total Current Assets	(687.4)	(607.3)
Property, Plant and Equipment, Net	0.0	0.0
Investment in Consolidated Subsidiaries	(2,557.5)	(2,358.2)
Goodwill	0.0	0.0
Other Intangible Assets, net	0.0	0.0
Other Assets	0.0	0.0
Assets held for sale		0.0
TOTAL ASSETS	(3,244.9)	(2,965.5)
Current Liabilities
Current portion of long-term debt	0.0
Trade accounts payable	(679.6)	(601.9)
Accrued expenses	(8.0)	(5.4)
Liabilities held for sale	0.0	0.0
Total Current Liabilities	(687.6)	(607.3)
Long-Term Debt	0.0	0.0
Other Long-Term Liabilities	0.0	0.0
Liabilities held for sale		0.0
Total Liabilities	(687.6)	(607.3)
Total Equity	(2,557.3)	(2,358.2)
TOTAL LIABILITIES AND STOCKHOLDERS’ EQUITY	(3,244.9)	(2,965.5)
Parent \| Reportable legal entities
Current Assets
Cash and cash equivalents	114.5	54.2	92.3	101.2
Accounts receivable, net	1.1	3.1
Inventories	0.0	0.0
Prepaid and other current assets	0.6	5.0
Assets held for sale	0.3	0.0
Total Current Assets	116.5	62.3
Property, Plant and Equipment, Net	0.0	0.0
Investment in Consolidated Subsidiaries	2,154.3	2,029.5
Goodwill	0.0	0.0
Other Intangible Assets, net	0.0	0.0
Other Assets	0.3	0.7
Assets held for sale		0.3
TOTAL ASSETS	2,271.1	2,092.8
Current Liabilities
Current portion of long-term debt	39.8
Trade accounts payable	454.0	398.3
Accrued expenses	11.6	11.1
Liabilities held for sale	0.0	0.0
Total Current Liabilities	505.4	409.4
Long-Term Debt	541.1	579.0
Other Long-Term Liabilities	9.2	1.9
Liabilities held for sale		0.0
Total Liabilities	1,055.7	990.3
Total Equity	1,215.4	1,102.5
TOTAL LIABILITIES AND STOCKHOLDERS’ EQUITY	2,271.1	2,092.8
Guarantor Subsidiaries \| Reportable legal entities
Current Assets
Cash and cash equivalents	16.0	9.5	0.0	3.9
Accounts receivable, net	623.0	552.5
Inventories	76.0	69.2
Prepaid and other current assets	11.7	10.1
Assets held for sale	546.7	162.3
Total Current Assets	1,273.4	803.6
Property, Plant and Equipment, Net	92.9	96.7
Investment in Consolidated Subsidiaries	403.2	328.7
Goodwill	738.1	736.1
Other Intangible Assets, net	139.5	159.5
Other Assets	6.0	7.7
Assets held for sale		380.0
TOTAL ASSETS	2,653.1	2,512.3
Current Liabilities
Current portion of long-term debt	0.0
Trade accounts payable	347.0	325.9
Accrued expenses	113.9	108.5
Liabilities held for sale	7.8	8.3
Total Current Liabilities	468.7	442.7
Long-Term Debt	0.0	0.0
Other Long-Term Liabilities	36.1	52.9
Liabilities held for sale		1.5
Total Liabilities	504.8	497.1
Total Equity	2,148.3	2,015.2
TOTAL LIABILITIES AND STOCKHOLDERS’ EQUITY	2,653.1	2,512.3
Non-Guarantor Subsidiaries \| Reportable legal entities
Current Assets
Cash and cash equivalents	89.2	50.0	$ 39.7	$ 43.9
Accounts receivable, net	266.3	239.9
Inventories	15.1	11.5
Prepaid and other current assets	2.1	1.8
Assets held for sale	85.5	31.7
Total Current Assets	458.2	334.9
Property, Plant and Equipment, Net	17.0	12.6
Investment in Consolidated Subsidiaries	0.0	0.0
Goodwill	26.6	26.2
Other Intangible Assets, net	9.4	8.7
Other Assets	5.4	3.2
Assets held for sale		46.6
TOTAL ASSETS	516.6	432.2
Current Liabilities
Current portion of long-term debt	0.0
Trade accounts payable	49.8	38.3
Accrued expenses	27.4	24.2
Liabilities held for sale	26.1	17.1
Total Current Liabilities	103.3	79.6
Long-Term Debt	0.0	0.0
Other Long-Term Liabilities	4.3	4.4
Liabilities held for sale		5.2
Total Liabilities	107.6	89.2
Total Equity	409.0	343.0
TOTAL LIABILITIES AND STOCKHOLDERS’ EQUITY	$ 516.6	$ 432.2

Deferred Tax and Other Assets Noncurrent

No definition available.

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Namespace Prefix:	hyh_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Carrying value as of the balance sheet date of liabilities incurred (and for which invoices have typically been received) and payable to vendors for goods and services received that are used in an entity's business. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).