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Long-Term Debt (Tables)

12 Months Ended

Dec. 31, 2018

Long-term Debt, Current and Noncurrent [Abstract]

Schedule of Long-Term Debt

Our long-term debt as of December 31, 2018 and 2017 is as follows:

Long-term debt type	Maturity as of December 31, 2018	Weighted average interest rate (%)			Outstanding balance as of December 31, (in millions)
					2018				2017
Senior notes:
NiSource	March 2018	6.40	%		—				275.1
NiSource	January 2019	6.80	%		—				255.1
NiSource	September 2020	5.45	%		—				325.1
NiSource	December 2021	4.45	%		63.6				63.6
NiSource	March 2022	6.13	%		—				180.0
NiSource	November 2022	2.65	%		500.0				500.0
NiSource	February 2023	3.85	%		250.0				250.0
NiSource	June 2023	3.65	%		350.0				—
NiSource	November 2025	5.89	%		265.0				265.0
NiSource	May 2027	3.49	%		1,000.0				1,000.0
NiSource	December 2027	6.78	%		3.0				3.0
NiSource	December 2040	6.25	%		250.0				250.0
NiSource	June 2041	5.95	%		400.0				400.0
NiSource	February 2042	5.80	%		250.0				250.0
NiSource	February 2043	5.25	%		500.0				500.0
NiSource	February 2044	4.80	%		750.0				750.0
NiSource	February 2045	5.65	%		500.0				500.0
NiSource	May 2047	4.38	%		1,000.0				1,000.0
NiSource	March 2048	3.95	%		750.0				750.0
Total senior notes					$	6,831.6			$	7,516.9
Medium term notes:
NiSource	April 2022 to May 2027	7.99	%		$	49.0			$	49.0
NIPSCO	August 2022 to August 2027	7.61	%		68.0				68.0
Columbia of Massachusetts	December 2025 to February 2028	6.30	%		40.0				40.0
Total medium term notes					$	157.0			$	157.0
Capital leases:
NIPSCO	May 2018	3.95	%		$	—			$	3.8
NiSource Corporate Services	January 2019 to October 2022	3.68	%		11.6				1.4
Columbia of Ohio	October 2021 to June 2038	6.33	%		91.5				88.5
Columbia of Virginia	July 2029 to December 2037	7.12	%		15.2				5.2
Columbia of Kentucky	May 2027	3.79	%		0.3				0.4
Columbia of Pennsylvania	August 2027 to June 2036	5.42	%		30.0				31.0
Columbia of Massachusetts	December 2033 to November 2043	5.48	%		45.7				22.8
Total capital leases					194.3				153.1
Pollution control bonds - NIPSCO	April 2019	5.85	%		41.0				41.0
Unamortized issuance costs and discounts					(68.5		)		$	(71.5	)
Total Long-Term Debt					$	7,155.4			$	7,796.5

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- Definition

Tabular disclosure of information pertaining to short-term and long-debt instruments or arrangements, including but not limited to identification of terms, features, collateral requirements and other information necessary to a fair presentation.

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