Consolidated Statements of Operations and Comprehensive Income - USD ($)
shares in Millions, $ in Millions
3 Months Ended
Mar. 30, 2018
Mar. 31, 2017
Income Statement [Abstract]    
Revenues $ 1,377.6 $ 1,436.7
Cost of revenues (exclusive of amortization shown below) 860.2 933.6
Gross profit 517.4 503.1
Operating expenses:    
Research and development 155.2 140.1
Selling and marketing 77.8 77.5
General and administrative 70.9 68.4
Amortization of acquisition-related intangible assets 27.4 29.1
Restructuring, asset impairments and other, net 0.4 0.5
Intangible asset impairment 0.0 4.4
Total operating expenses 331.7 320.0
Operating income 185.7 183.1
Other (expense) income, net:    
Interest expense (31.5) (38.4)
Interest income 0.9 0.6
Loss on debt refinancing and prepayment 0.0 (26.2)
Licensing income 3.8 0.0
Other expense (2.0) (4.1)
Other (expense) income, net (28.8) (68.1)
Income before income taxes 156.9 115.0
Income tax provision (16.4) (36.3)
Net income 140.5 78.7
Less: Net income attributable to non-controlling interest (0.9) (0.5)
Net income attributable to ON Semiconductor Corporation 139.6 78.2
Comprehensive income, net of tax:    
Net income 140.5 78.7
Foreign currency translation adjustments 2.4 6.3
Effects of cash flow hedges 3.8 0.8
Other comprehensive income, net of tax of $1.0 and $0.6, respectively 6.2 7.1
Comprehensive income 146.7 85.8
Comprehensive income attributable to non-controlling interest (0.9) (0.5)
Comprehensive income attributable to ON Semiconductor Corporation $ 145.8 $ 85.3
Net income per common share attributable to ON Semiconductor Corporation:    
Basic (in dollars per share) $ 0.33 $ 0.19
Diluted (in dollars per share) $ 0.31 $ 0.18
Weighted-average common shares outstanding:    
Basic (in shares) 425.9 419.8
Diluted (in shares) 444.2 425.8