Lease Accounting (Tables)

3 Months Ended

Mar. 31, 2020

Leases [Abstract]

Lessee, Lease

Leases are reflected in the following balance sheet accounts:

(Millions of dollars)	Classification	March 31, 2020		December 31, 2019
Assets
Operating (Right-of-use)	Other Assets	$	128.9	$	124.2
Finance	Property, plant, and equipment, at cost, less accumulated depreciation of $2.4 at March 31, 2020 and $2.2 at December 31, 2019	2.9		3.0
Total leased assets		$	131.8	$	127.2
Liabilities
Current
Operating	Trade accounts payable and accrued liabilities	$	6.9	$	6.8
Finance	Current maturities of long-term debt	1.2		1.2
Noncurrent
Operating	Deferred credits and other liabilities	123.4		118.5
Finance	Long-term debt, including capitalized lease obligations	1.1		1.2
Total lease liabilities		$	132.6	$	127.7

Lease, Cost

Lease Cost:

		Three Months Ended March 31,		Three Months Ended March 31,
(Millions of dollars)	Classification	2020		2019
Operating lease cost	Station and other operating expenses	$	3.9	$	3.5
Finance lease cost
Amortization of leased assets	Depreciation & amortization expense	0.3		0.3
Interest on lease liabilities	Interest expense	—		—
Net lease costs		$	4.2	$	3.8

Cash flow information:

	Three Months Ended March 31,
(Millions of dollars)	2020		2019
Cash paid for amounts included in the measurement of liabilities
Operating cash flows from operating leases	$	3.7	$	3.3
Operating cash flows from finance leases	$	—	$	—
Financing cash flows from finance leases	$	0.4	$	0.4

Maturity of Lease Liabilities at March 31, 2020:

(Millions of dollars)	Operating leases		Finance leases
2020	$	11.3	$	1.1
2021	14.6		1.0
2022	13.8		0.4
2023	13.2		—
2024	12.8		—
After 2024	152.2		—
Total lease payments	217.9		2.5
less: interest	87.7		0.2
Present value of lease liabilities	$	130.2	$	2.3

	Three Months Ended March 31,
	2020
Weighted average remaining lease term (years)
Finance leases	2.0
Operating leases	15.6
Weighted average discount rate
Finance leases	4.8	%
Operating leases	6.0	%

Finance Lease, Liability, Maturity

Maturity of Lease Liabilities at March 31, 2020:

(Millions of dollars)	Operating leases		Finance leases
2020	$	11.3	$	1.1
2021	14.6		1.0
2022	13.8		0.4
2023	13.2		—
2024	12.8		—
After 2024	152.2		—
Total lease payments	217.9		2.5
less: interest	87.7		0.2
Present value of lease liabilities	$	130.2	$	2.3

Lessee, Operating Lease, Liability, Maturity

Maturity of Lease Liabilities at March 31, 2020:

(Millions of dollars)	Operating leases		Finance leases
2020	$	11.3	$	1.1
2021	14.6		1.0
2022	13.8		0.4
2023	13.2		—
2024	12.8		—
After 2024	152.2		—
Total lease payments	217.9		2.5
less: interest	87.7		0.2
Present value of lease liabilities	$	130.2	$	2.3