Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Millions	Sep. 30, 2020	Dec. 31, 2019
ASSETS
Allowance for bad debt	$ 0.5	$ 0.5
Property and equipment, accumulated depreciation	3,775.9	3,418.6
Intangible assets, accumulated amortization	$ 638.0	$ 545.9
Members’ equity:
Common units issued (in shares)	489,734,530	487,791,612
Common units outstanding (in shares)	487,791,612	489,734,530

Amount of accumulated depreciation, depletion and amortization for physical assets used in the normal conduct of business to produce goods and services.

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