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Other Non-current Liabilities (Details) $ in Millions	Sep. 30, 2016 USD ($)
Other Non-Current Liabilities [Abstract]
Convertible Preferred Instrument	$ 91

X

- Definition

Convertible Preferred Instrument

+ References

No definition available.

+ Details

Name:	cva_ConvertiblePreferredInstrument
Namespace Prefix:	cva_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

Other Non-Current Liabilities [Abstract]

+ References

No definition available.

+ Details

Name:	cva_OtherNonCurrentLiabilitiesAbstract
Namespace Prefix:	cva_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration