Contingencies - Summary of Cumulative Trauma Product Liability Claims Activity (Detail)	12 Months Ended
	Dec. 31, 2019 trauma_claim lawsuit	Dec. 31, 2018 trauma_claim lawsuit	Dec. 31, 2017 trauma_claim lawsuit
Lawsuits
Loss Contingency, Quantities [Roll Forward]
Open lawsuits/Pending claims, January 1 | lawsuit	1,481	1,420	1,794
New lawsuits/claims | lawsuit	346	369	398
Settled and dismissed lawsuits/claims | lawsuit	(222)	(308)	(772)
Open lawsuits/Pending claims, December 31 | lawsuit	1,605	1,481	1,420
Pending claims
Loss Contingency, Quantities [Roll Forward]
Open lawsuits/Pending claims, January 1 | trauma_claim	2,355	2,242	3,023
New lawsuits/claims | trauma_claim	486	479	455
Settled and dismissed lawsuits/claims | trauma_claim	(385)	(366)	(1,236)
Open lawsuits/Pending claims, December 31 | trauma_claim	2,456	2,355	2,242