Summary of Short-Term Borrowings and Long-Term Debt (Details) - USD ($) $ in Millions	6 Months Ended	12 Months Ended
Jun. 30, 2019	Dec. 31, 2018
Short-term borrowings
Commercial paper issuances	$ 109.8	$ 0.0
Various debt due to international banks	1.8	1.8
Total short-term borrowings	111.6	1.8
Long-term debt
Debt issuance costs, net	(12.8)	(13.1)
Fair value adjustment asset (liability) related to hedged fixed rate debt instrument	(0.8)	(3.0)
Total long-term debt	2,108.0	2,105.3
Less: current maturities	(299.0)	(596.5)
Net long-term debt	1,809.0	1,508.8
Floating Rate Senior notes due January 25, 2019
Long-term debt
Senior notes	0.0	300.0
2.45% Senior notes due December 15, 2019
Long-term debt
Senior notes	300.0	300.0
Term Loan
Long-term debt
Term loan	300.0	0.0
2.45% Senior notes due August 1, 2022
Long-term debt
Senior notes	300.0	300.0
Less: Discount	(0.2)	(0.3)
2.875% Senior notes due October 1, 2022
Long-term debt
Senior notes	400.0	400.0
Less: Discount	(0.1)	(0.1)
3.15% Senior notes due August 1, 2027
Long-term debt
Senior notes	425.0	425.0
Less: Discount	(0.4)	(0.4)
3.95% Senior notes due August 1, 2047
Long-term debt
Senior notes	400.0	400.0
Less: Discount	$ (2.7)	$ (2.8)

Carrying value as of the balance sheet date of short-term borrowings using unsecured obligations issued by banks, corporations and other borrowers to investors. The maturities of these money market securities generally do not exceed 270 days.

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