It covers every mode of transport under the IDFM umbrella:

Beyond the mathematical calculation of savings, the Navigo Annuel provides a qualitative benefit often described as "psychological freedom." When a user pays per ride, every journey carries an implicit cost-benefit analysis. The Navigo Annuel eliminates this friction. A holder can disembark a train to run a quick errand and board the next one without penalty; they can take the bus for a single stop or use the RER to travel across the city for a social engagement.