CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (UNAUDITED) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Cash flows from operating activities
Net income	$ 47.8	$ 47.5
Adjustments to reconcile net income to net cash provided by operating activities
Depreciation	0.7	0.7
Non-cash expenses	0.1	0.1
Income from equity method investments	(30.3)	(31.3)
Distributions of earnings received from equity method investments	28.3	31.4
Changes in operating assets and liabilities
Accounts receivable	0.7	1.1
Prepaid expenses and other current assets	2.5	2.3
Accounts payable	(1.2)	0.3
Deferred revenues and credits – related parties	(0.9)	0.6
Other	0.3	(3.8)
Net cash provided by operating activities	48.0	48.9
Cash flows from investing activities
Capital expenditures	(3.4)	(0.7)
Distributions in excess of earnings from equity method investments	1.9	2.8
Net cash (used in) provided by investing activities	(1.5)	2.1
Cash flows from financing activities
Proceeds from issuance of debt – related parties	0.0	(468.0)
Distributions to unitholders and general partner	(37.6)	(37.6)
Distributions to non-controlling interests	(6.4)	(6.7)
Net cash used in financing activities	(44.0)	(44.3)
Net change in cash and cash equivalents	2.5	6.7
Cash and cash equivalents at beginning of the period	126.9	98.8
Cash and cash equivalents at end of the period	129.4	105.5
Supplemental cash flow information
Cash paid for interest	1.2	7.5
Non-cash investing transactions
Accrued capital expenditures	2.0	0.2
Proceeds from Issuance of Long-term Debt	$ 0.0	$ 468.0