From the piece:
Officials say the plan would be part of a broader effort to save Detroit tens of millions of dollars in health costs each year, a major element in a restructuring package that must be approved by a bankruptcy judge. It is being watched closely by municipal leaders around the nation, many of whom complain of mounting, unsustainable prices for the health care promised to retired city workers.
Similar proposals that could shift public sector retirees into the new insurance markets, called exchanges, are already being planned or contemplated in places like Chicago; Sheboygan County, Wis.; and Stockton, Calif. While large employers that eliminate health benefits for full-time workers can be penalized under the health care law, retirees are a different matter.