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Borrowings (Schedule of Debt) (Details) - USD ($) $ in Millions | Dec. 31, 2020 | Dec. 31, 2019
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Debt Disclosure [Abstract] |  |
Short-term commercial paper borrowings | $ 0.0 | $ 1,494.2
Long-term notes | 16,348.7 | 13,638.5
Other long-term debt | 14.8 | 12.9
Unamortized debt issuance costs | (89.1) | (73.6)
Fair value adjustment on hedged long-term notes | 320.9 | 245.2
Total debt | 16,595.3 | 15,317.2
Less current portion | (8.7) | (1,499.3)
Long-term debt | $ 16,586.6 | $ 13,817.9

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