Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Millions	Mar. 31, 2019	Dec. 31, 2018
ASSETS
Allowance for bad debt	$ 0.5	$ 0.3
Property and equipment, accumulated depreciation	3,080.1	2,967.4
Intangible assets, accumulated amortization	$ 453.1	$ 422.2
Members’ equity:
Common units issued (in shares)	487,160,080.000	181,309,981
Common units outstanding (in shares)	487,160,080	181,309,981