Business Disposition - Schedule of Condensed Consolidated Balance Sheets (Detail) - USD ($) $ in Millions	Jun. 30, 2016	Dec. 31, 2015
ASSETS
Current assets	$ 879.6	$ 896.2
Restricted cash	22.3	19.6
Property and equipment, net	668.4	665.7
LIABILITIES
Current maturities of long-term debt	38.8	9.5
Long-term debt	970.5	951.0
Contran \| Trade Accounts Payables
LIABILITIES
Payable to affiliates	28.7	26.1
Waste Management
ASSETS
Current assets	10.8	10.1
Restricted cash	18.9	16.2
Property and equipment, net	144.3	150.0
LIABILITIES
Current maturities of long-term debt	4.3	4.9
Long-term debt	69.8	71.4
Accrued noncurrent closure and post closure costs	28.4	27.4
Waste Management \| Capitalized Operating Permits
ASSETS
Waste disposal site operating permits, net	46.2	48.1
Waste Management \| Contran \| Trade Accounts Payables
LIABILITIES
Payable to affiliates	$ 28.7	$ 26.1

The estimated amount of costs required as of the balance sheet date to comply with regulatory requirements pertaining to the retirement of a waste management facility, which will be paid after one year or beyond the normal operating cycle, if longer.

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