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Schedule of Segment Earnings (Detail) - USD ($) $ in Millions | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2017 | Sep. 30, 2017 | Jun. 30, 2017 | Mar. 31, 2017 | Dec. 31, 2016 | Sep. 30, 2016 | Jun. 30, 2016 | Mar. 31, 2016 | Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Net sales | $ 768.6 | $ 749.9 | $ 738.2 | $ 740.0 | $ 698.1 | $ 683.9 | $ 667.0 | $ 636.9 | $ 2,996.7 | $ 2,685.9 | $ 2,536.5
Segment earnings |  |  |  |  |  |  |  |  | 577.9 | 515.0 | 452.9
Other income (expense) |  |  |  |  |  |  |  |  | 10.4 | 9.4 | 10.8
Interest expense |  |  |  |  |  |  |  |  | (10.1) | (7.3) | (7.4)
Earnings before provision for income taxes |  |  |  |  |  |  |  |  | 520.8 | 462.5 | 402.5
Provision for income taxes |  |  |  |  |  |  |  |  | (224.3) | (136.0) | (119.6)
Earnings from continuing operations | $ 22.7 | $ 93.7 | $ 92.4 | $ 87.7 | $ 82.7 | $ 83.2 | $ 87.1 | $ 73.5 | 296.5 | 326.5 | 282.9
Inter-segment |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  | (24.4) | (22.9) | (32.6)
Corporate |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Other income (expense) |  |  |  |  |  |  |  |  | (47.0) | (45.2) | (43.0)
North America | Operating Segments |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  | 1,904.8 | 1,743.2 | 1,703.0
Segment earnings |  |  |  |  |  |  |  |  | 428.6 | 385.9 | 339.9
Rest of World | Operating Segments |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  | 1,116.3 | 965.6 | 866.1
Segment earnings |  |  |  |  |  |  |  |  | $ 149.3 | $ 129.1 | $ 113.0

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