Long-Term Debt and Financing Arrangements (Tables)

9 Months Ended

Sep. 30, 2017

Notes To Financial Statements [Abstract]

Long-Term Debt and Financing Arrangements

Long-term debt and financing arrangements at September 30, 2017 and December 31, 2016 are as follows:

		September 30, 2017																December 31, 2016
(Millions of Dollars)	Interest Rate	Original Notional		Unamortized Discount			Unamortized Gain/(Loss) Terminated Swaps (1)			Purchase Accounting FV Adjustment		Deferred Financing Fees			Carrying Value			Carrying Value
Notes payable due 2018	2.45%	$	632.5	$	—		$	—		$	—	$	(2.0	)	$	630.5		$	629.2
Notes payable due 2018	1.62%	345.0		—			—			—		(1.1		)	343.9			343.1
Notes payable due 2021	3.40%	400.0		(0.2		)	14.5			—		(1.4		)	412.9			415.2
Notes payable due 2022	2.90%	754.3		(0.3		)	—			—		(3.2		)	750.8			750.3
Notes payable due 2028	7.05%	150.0		—			11.7			11.4		—			173.1			174.7
Notes payable due 2040	5.20%	400.0		(0.2		)	(33.8		)	—		(3.1		)	362.9			361.7
Notes payable due 2052 (junior subordinated)	5.75%	750.0		—			—			—		(19.1		)	730.9			730.4
Notes payable due 2053 (junior subordinated)	5.75%	400.0		—			4.7			—		(8.1		)	396.6			396.5
Other, payable in varying amounts through 2022	0.00% - 2.73%	25.1		—			—			—		—			25.1			22.0
Total long-term debt, including current maturities		$	3,856.9	$	(0.7	)	$	(2.9	)	$	11.4	$	(38.0	)	$	3,826.7		$	3,823.1
Less: Current maturities of long-term debt															(8.7		)	(7.8		)
Long-term debt															$	3,818.0		$	3,815.3