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Debt - Summary of Debt (Detail) - USD ($) $ in Millions | Dec. 31, 2018 | Dec. 31, 2017
--- | --- | ---
Debt Instrument [Line Items] |  |
Commercial paper | $ 0.0 | $ 0.0
Receivables facilities |  | 298.3
Other debt | 48.4 | 70.6
Total debt | 7,015.0 | 10,551.0
Debt |  |
Total debt | 7,015.0 | 10,551.0
Short-term debt and current portion of long-term debt | (318.7) | (661.8)
Long-term debt | 6,696.3 | 9,889.2
2.15% Senior Notes Due 2018 [Member] |  |
Debt Instrument [Line Items] |  |
Total Debt |  | 299.5
2.60% Senior Notes Due 2019 [Member] |  |
Debt Instrument [Line Items] |  |
Total Debt | 267.3 | 266.7
2.875% Senior Notes Due 2019 [Member] |  |
Debt Instrument [Line Items] |  |
Total Debt |  | 348.6
4.70% Senior Notes Due 2020 [Member] |  |
Debt Instrument [Line Items] |  |
Total Debt | 304.6 | 304.3
3.15% Senior Notes Due 2021 [Member] |  |
Debt Instrument [Line Items] |  |
Total Debt | 97.5 | 993.6
3.75% Senior Notes Due 2021 [Member] |  |
Debt Instrument [Line Items] |  |
Total Debt | 353.2 | 373.2
4.00% Senior Notes Due 2022 [Member] |  |
Debt Instrument [Line Items] |  |
Total Debt | 249.0 | 248.8
3.85% Senior Notes Due 2023 [Member] |  |
Debt Instrument [Line Items] |  |
Total Debt | 1,740.8 | 1,738.8
5.00% Senior Notes Due 2023 [Member] |  |
Debt Instrument [Line Items] |  |
Total Debt | 310.0 | 312.1
4.00% Senior Notes Due 2024 [Member] |  |
Debt Instrument [Line Items] |  |
Total Debt | 496.4 | 495.8
3.90% Senior Notes Due 2025 [Member] |  |
Debt Instrument [Line Items] |  |
Total Debt | 90.3 | 297.2
4.20% Senior Notes Due 2026 [Member] |  |
Debt Instrument [Line Items] |  |
Total Debt | 1,984.5 | 1,982.7
5.375% Senior Notes Due 2036 [Member] |  |
Debt Instrument [Line Items] |  |
Total Debt | 415.8 | 495.0
5.50% Senior Notes Due 2046 [Member] |  |
Debt Instrument [Line Items] |  |
Total Debt | $ 657.2 | 1,726.0
Term Loan [Member] |  |
Debt Instrument [Line Items] |  |
Total Debt |  | $ 299.8

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