Goodwill - Key assumptions (Detail)		Dec. 31, 2019		Dec. 31, 2018
Image-Guided Therapy [Member]
Goodwill - Text Details (Detail) [Line Items]
Initial forecast period		9.30%	[1]	8.10%	[2]
Growth rate used to extrapolate cash flow projections		6.40%	[1],[3]	5.20%	[2],[4]
Used to calculate terminal value		2.50%	[1],[5]	2.30%	[2],[6]
Discount rate applied to cash flow projections		8.80%		9.30%
Monitoring and Analytics [member]
Goodwill - Text Details (Detail) [Line Items]
Initial forecast period	[1]	4.60%
Growth rate used to extrapolate cash flow projections	[1],[3]	3.80%
Used to calculate terminal value	[1],[5]	2.50%
Discount rate applied to cash flow projections		10.10%
Patient Care & Monitoring Solutions [Member]
Goodwill - Text Details (Detail) [Line Items]
Initial forecast period	[2]			6.50%
Growth rate used to extrapolate cash flow projections	[2],[4]			4.00%
Used to calculate terminal value	[2],[6]			2.30%
Discount rate applied to cash flow projections				9.90%
Sleep & Respiratory Care [Member]
Goodwill - Text Details (Detail) [Line Items]
Initial forecast period		8.10%	[1]	8.40%	[2]
Growth rate used to extrapolate cash flow projections		4.80%	[1],[3]	4.80%	[2],[4]
Used to calculate terminal value		2.50%	[1],[5]	2.30%	[2],[6]
Discount rate applied to cash flow projections		9.70%		10.60%

[1] Compound sales growth rate is the annualized steady nominal growth rate over the forecast period

[2] Compound sales growth rate is the annualized steady nominal growth rate over the forecast period

[3] Also referred to later in the text as compound long-term sales growth rate

[4] Also referred to later in the text as compound long-term sales growth rate

[5] The historical long-term growth rate is only applied to the first year after the 4 year extrapolation period, after which no further growth is assumed for the terminal value calculation

[6] The historical long-term growth rate is only applied to the first year after the 5 year extrapolation period, after which no further growth is assumed for the terminal value calculation