Document any measurable improvements you make to any system.
In organizations above a certain size, the fact that you made some system better is easily lost in the thousands of goals and activities in progress at any given time.
One could cynically demur that a 0.2x improvement well-documented and demonstrated is better recieved than a 10x improvement done modestly and internally... But the fact of the matter is that clear communication about meaningful activities going on in the organization, such as 0.2x or 10x improvements, is itself an important activity.
Important work getting done that no one is aware of is liable to be lost or cut or broken unknowingly. It is your responsibility to demonstrate the value of your work, not just for career progression or vanity, but because your job as a knowledge worker in a complex organization is to convey meaningful information about the activities of the members of that organization to the rest of the organization, particularly those tasked with making high-level decisions about sizeable branches of the organization.
If a boss is sufficiently unaware or unimpressed or unappreciative of some piece of work of yours to consider cutting it or otherwise passing it over, this is reflective of your failure to effectively convey to him information that it is your job to produce, process, and present.
Do your job!