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Segment Reporting - Reconciliation of Consolidated Segment Earnings to Consolidated Income Before Provision for Income Taxes (Detail) - USD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items] |  |  |
Consolidated income before interest, other expense, provision for income taxes and equity in net income of affiliates | $ 1,654.1 | $ 1,608.3 | $ 1,461.4
Interest expense | 84.1 | 85.7 | 82.5
Other (income) expense, net | 31.6 | (4.1) | 40.6
Consolidated income before provision for income taxes and equity in net income of affiliates | 1,538.4 | 1,526.7 | 1,338.3
Operating segments |  |  |
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items] |  |  |
Consolidated income before interest, other expense, provision for income taxes and equity in net income of affiliates | 1,892.1 | 1,892.4 | 1,727.3
Other |  |  |
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items] |  |  |
Consolidated income before interest, other expense, provision for income taxes and equity in net income of affiliates | $ (238.0) | $ (284.1) | $ (265.9)

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