Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Millions	Mar. 31, 2017	Dec. 31, 2016
ASSETS
Allowance for bad debt	$ 0.1	$ 0.1
Property and equipment, accumulated depreciation	2,220.6	2,124.1
Intangible assets, accumulated amortization	201.1	171.6
Liabilities:
Current installment payable discount	19.9	0.5
Noncurrent installment payable discount	$ 0.0	$ 26.3
Members’ equity:
Common units issued (in shares)	180,551,299	180,049,316
Common units outstanding (in shares)	180,551,299	180,049,316

Amount of current portion of discount available based on when a payment is made.

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Amount of noncurrent portion of discount available based on when a payment is made.

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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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A valuation allowance for trade and other receivables due to an Entity within one year (or the normal operating cycle, whichever is longer) that are expected to be uncollectible.

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Number of common units issued of limited liability company (LLC).

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Number of common units of ownership outstanding of a limited liability company (LLC).

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Accumulated amount of amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

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