Financing (Tables)

6 Months Ended

Jun. 30, 2017

Debt Disclosure [Abstract]

Schedule of Long-term Debt Instruments

For the six months ended June 30, 2017 and 2016, the Partnership completed the following debt issuances (in millions, except interest rates):

Date of Issuance	Issuing Subsidiary	Amount of  Issuance		Purchaser Discounts and Expenses		Net Proceeds			Interest Rate	Maturity Date	Interest Payable
January 2017	Boardwalk Pipelines	$	500.0	$	6.0	$	494.0	(1)	4.45%	July 15, 2027	January 15 and July 15
May 2016	Boardwalk Pipelines	$	550.0	$	10.9	$	539.1	(2)	5.95%	June 1, 2026	June 1 and December 1

(1) The net proceeds of this offering will be used to refinance future maturities of debt and to fund growth capital expenditures. Initially, the proceeds were used to reduce outstanding borrowings under the revolving credit facility.

(2) The net proceeds of this offering were used to retire the outstanding $250.0 million aggregate principal amount of Boardwalk Pipelines 5.875% notes due 2016 and the outstanding $300.0 million aggregate principal amount of Boardwalk Pipelines 5.50% notes due 2017 at their maturity. Initially, the Partnership used the net proceeds to reduce outstanding borrowings under its revolving credit facility.