Notes Payable and Long-Term Debt (Tables)

12 Months Ended

Dec. 31, 2017

Debt Instrument [Line Items]

Outstanding Notes Payable And Long Term Debt [Text Block]

	December 31,
(millions of dollars)	2017		2016
Short-term debt
Short-term borrowings	$	68.8	$	156.5
Long-term debt
8.00% Senior notes due 10/01/19 ($134 million par value)	137.4		139.1
4.625% Senior notes due 09/15/20 ($250 million par value)	251.4		251.9
1.80% Senior notes due 11/7/22 (€500 million par value)	595.7		520.7
3.375% Senior notes due 03/15/25 ($500 million par value)	496.1		495.6
7.125% Senior notes due 02/15/29 ($121 million par value)	118.9		118.8
4.375% Senior notes due 03/15/45 ($500 million par value)	493.5		493.3
Term loan facilities and other	26.5		43.6
Total long-term debt	$	2,119.5	$	2,063.0
Less: current portion	15.8		19.4
Long-term debt, net of current portion	$	2,103.7	$	2,043.6

Annual principal payments [Text Block]

(millions of dollars)
2018	$	84.6
2019	138.7
2020	252.7
2021	2.7
2022	600.4
After 2022	1,121.0
Total payments	$	2,200.1
Less: unamortized discounts	11.8
Total	$	2,188.3