Income Taxes (Details 1) - USD ($) $ in Millions	Dec. 31, 2017	Dec. 31, 2016
Components of deferred tax assets and liabilities
Tax credits	$ 60.0	$ 201.1
Inventory, other reserves, and accruals	147.8	250.6
Intangibles, net	378.8	459.8
Net operating loss	209.8	65.9
Share-based compensation	26.9	61.5
Other	25.1	49.0
Valuation allowance	(16.6)	(16.1)
Total deferred tax assets	831.8	1,071.8
Purchased intangible assets	(250.7)	(376.6)
Depreciation, amortization and other	(107.9)	(113.5)
Total deferred tax liabilities	$ 358.6	$ 490.1