Id
Data Gathering Parameter
Active 
Release 7
Release 8
Id
Parameter Value: [Salesforce ID]
&Id={!Account.Id}
Master Object ID
Sets the master object. All fields are retrieved from this object.
You can also use dynamic field content for the parameter value: &Id={!Account.Id}
This parameter is required in order for Conga Composer to function.
A Conga Composer URL must contain one (and only one) instance of this parameter.