Family leave in the United States is a patchwork of policies. If you have employees in more than one state (sometimes more than one county), it can be a nightmare for your employee handbook, for anyone who has to administer programs and payroll, and for managers who may not understand the state-by-state variations.
Only 14 states (and D.C.) currently require paid family leave. Seven more states have created systems for employers to opt in (with two more on the way). And many companies offer it privately.
However, there is little in common among the programs. Each has its own eligibility rules, payment percentages, and math challenges like, "$19,200 -OR- total wages ≥$6,400 AND $3,200 in one base quarter AND total wages ≥1.5x highest quarter of earnings." (Thanks, Rhode Island.)