Partners' Equity, Income Allocations and Cash Distributions - Issuances (Details) $ in Millions	3 Months Ended
	Mar. 31, 2020 USD ($) shares
Partners' Capital [Abstract]
Common units held by HFC (in shares) | shares	59,630,030
Ownership percentage, controlling interest	57.00%
Common Unit Issuance Program | $	$ 200.0
Partners' capital account, units, sale of units (in shares) | shares	2,413,153
Gross proceeds from issuance of common units | $	$ 82.3