CONDENSED CONSOLIDATED STATEMENTS OF CHANGES IN PARTNERS' CAPITAL (Unaudited) - USD ($) $ in Millions	Total	Accumulated Other Comprehensive (Loss) Income	Partners' Capital
Beginning balance at Dec. 31, 2020	$ 5,249.1	$ (79.8)	$ 5,328.9
Add (deduct):
Net income	117.5		117.5
Other comprehensive income, net of tax	0.5	0.5
Ending balance at Mar. 31, 2021	5,367.1	(79.3)	5,446.4
Beginning balance at Dec. 31, 2021	5,469.1	(72.6)	5,541.7
Add (deduct):
Net income	125.2		125.2
Other comprehensive income, net of tax	0.5	0.5
Ending balance at Mar. 31, 2022	$ 5,594.8	$ (72.1)	$ 5,666.9