Acquisitions and Divestitures (Acquisitions Schedule of Purchase Price Allocation) (Details) - USD ($) $ in Millions	3 Months Ended	5 Months Ended	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2014	Dec. 31, 2014	Sep. 19, 2016	Dec. 31, 2015	Aug. 15, 2014	Apr. 30, 2014
Business Acquisition [Line Items]
Goodwill	$ 924.7	$ 263.8	$ 263.8		$ 270.6
Measurement Period Adjustments
Cash and cash equivalents	0.0
Receivables	0.0
Inventories	0.0
Other current assets	1.7
Property, plant and equipment	112.3
Goodwill	(77.5)
Intangible assets (excluding IPRD)	(9.8)
In-process research and development	31.8
Other non-current assets	(4.6)
Total assets acquired	53.9
Accounts payable	0.0
Other current liabilities	8.0
Deferred tax liabilities	45.9
Other non-current liabilities	0.0
Total liabilities assumed	53.9
Net assets acquired/purchase price	0.0
Fairchild [Member]
Business Acquisition [Line Items]
Cash and cash equivalents	255.0			$ 255.0
Receivables	227.3			227.3
Inventories	342.3			342.3
Other current assets	61.0			59.3
Property, plant and equipment	925.8			813.5
Goodwill	656.1			733.6
Intangible assets	413.6			423.4
In-process research and development	134.2			102.4
Other non-current assets	13.1			17.7
Total assets acquired	3,028.4			2,974.5
Accounts payable	79.4			79.4
Other current liabilities	168.1			160.1
Deferred tax liabilities	213.5			167.6
Other non-current liabilities	35.2			35.2
Total liabilities assumed	496.2			442.3
Net assets acquired	2,532.2			$ 2,532.2
Measurement Period Adjustments
Inventories	$ 67.5
Aptina [Member]
Business Acquisition [Line Items]
Cash and cash equivalents						$ 30.3
Receivables						53.2
Inventories						84.8
Other current assets						5.7
Property, plant and equipment						36.3
Goodwill						64.4
Intangible assets						207.8
In-process research and development						51.3
Other non-current assets						2.3
Total assets acquired						536.1
Accounts payable						66.6
Other current liabilities						49.7
Other non-current liabilities						14.4
Total liabilities assumed						130.7
Net assets acquired						$ 405.4
Measurement Period Adjustments
Inventories		$ 22.3
Truesense Imaging, Inc. [Member]
Business Acquisition [Line Items]
Cash and cash equivalents							$ 4.2
Receivables							8.8
Inventories							18.3
Other current assets							3.6
Property, plant and equipment							26.4
Goodwill							23.5
Intangible assets							35.5
In-process research and development							10.2
Total assets acquired							130.5
Accounts payable							3.8
Other current liabilities							6.0
Other non-current liabilities							25.0
Total liabilities assumed							34.8
Net assets acquired							$ 95.7
Measurement Period Adjustments
Inventories			$ 4.7