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Recently Issued Accounting Pronouncements Topic 606 (Details) - USD ($) $ in Millions | 3 Months Ended |  |
--- | --- | --- | ---
Jun. 30, 2018 | Jun. 30, 2017 | Apr. 01, 2018 | Mar. 31, 2018
Revenue, Initial Application Period Cumulative Effect Transition [Line Items] |  |  |  |  |
Net sales |  | $ 1,212.5 | $ 972.1 |  |
Cost of Goods Sold | [1] | 570.5 | 387.7 |  |
Gross Profit |  | 642.0 | 584.4 |  |
Income tax provision (benefit) |  | 2.0 | (4.4) |  |
Net income |  | 35.7 | $ 170.6 |  |
Accounts Receivable, Net, Current |  | 789.4 |  | $ 518.1 | $ 563.7
Inventories |  | 1,104.8 |  | 471.1 | 476.2
Other Assets, Current |  | 274.5 |  | 73.1 | 119.8
Long-term deferred tax assets |  | 1,675.8 |  | 1,656.5 | 100.2
Accrued liabilities |  | 491.3 |  | 248.1 | 229.6
Deferred income on shipments to distributors |  | 0.0 |  | 0.0 | 333.8
Long-term deferred tax liability |  | 854.2 |  | 221.5 | 205.8
Retained earnings |  | 3,149.2 |  | $ 3,199.0 | 1,397.3
Accounting Standards Update 2014-09 |  |  |  |  |
Revenue, Initial Application Period Cumulative Effect Transition [Line Items] |  |  |  |  |
Accounts Receivable, Net, Current |  |  |  |  | (45.6)
Inventories |  |  |  |  | (5.1)
Other Assets, Current |  |  |  |  | 17.2
Long-term deferred tax assets |  |  |  |  | (23.1)
Accrued liabilities |  |  |  |  | 18.5
Deferred income on shipments to distributors |  |  |  |  | (333.8)
Long-term deferred tax liability |  |  |  |  | 16.8
Retained earnings |  |  |  |  | $ 241.9
Calculated under Revenue Guidance in Effect before Topic 606 |  |  |  |  |
Revenue, Initial Application Period Cumulative Effect Transition [Line Items] |  |  |  |  |
Net sales |  | 1,210.0 |  |  |
Cost of Goods Sold | [1] | 571.7 |  |  |
Gross Profit |  | 638.3 |  |  |
Income tax provision (benefit) |  | (0.3) |  |  |
Net income |  | 34.3 |  |  |
Accounts Receivable, Net, Current |  | 845.7 |  |  |
Inventories |  | 1,109.9 |  |  |
Other Assets, Current |  | 256.8 |  |  |
Long-term deferred tax assets |  | 1,700.5 |  |  |
Accrued liabilities |  | 471.2 |  |  |
Deferred income on shipments to distributors |  | 349.5 |  |  |
Long-term deferred tax liability |  | 837.4 |  |  |
Retained earnings |  | 2,905.0 |  |  |
Difference between Revenue Guidance in Effect before and after Topic 606 | Accounting Standards Update 2014-09 |  |  |  |  |
Revenue, Initial Application Period Cumulative Effect Transition [Line Items] |  |  |  |  |
Net sales |  | 2.5 |  |  |
Cost of Goods Sold | [1] | (1.2) |  |  |
Gross Profit |  | 3.7 |  |  |
Income tax provision (benefit) |  | 2.3 |  |  |
Net income |  | 1.4 |  |  |
Accounts Receivable, Net, Current |  | (56.3) |  |  |
Inventories |  | (5.1) |  |  |
Other Assets, Current |  | 17.7 |  |  |
Long-term deferred tax assets |  | (24.7) |  |  |
Accrued liabilities |  | 20.1 |  |  |
Deferred income on shipments to distributors |  | (349.5) |  |  |
Long-term deferred tax liability |  | 16.8 |  |  |
Retained earnings |  | $ 244.2 |  |  |
[1] | Includes share-based compensation expense as follows:Cost of sales 3.6 3.4 Research and development 14.1 10.3 Selling, general and administrative 11.7 8.7Special charges and other, net 15.9 0

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