Income Taxes - Components of Deferred Taxes (Detail) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Deferred tax assets:
Inventory	$ 297.2	$ 295.6
Net operating loss carryover	511.2	514.4
Tax credit carryover	55.1	33.8
Capital loss carryover	9.0	8.3
Product liability and litigation	53.9	40.4
Accrued liabilities	86.1	101.6
Share-based compensation	30.4	28.6
Accounts receivable	19.0	24.6
Foreign currency hedges	69.0
Other	19.2	16.8
Total deferred tax assets	1,150.1	1,064.1
Less: Valuation allowances	(542.1)	(546.1)
Total deferred tax assets after valuation allowances	608.0	518.0
Deferred tax liabilities:
Fixed assets	119.2	77.6
Intangible assets	787.6	772.3
Foreign currency hedges		13.8
Other	39.8	23.0
Total deferred tax liabilities	946.6	886.7
Total net deferred income taxes	$ (338.6)	$ (368.7)