You can't copyright or patent ideas. Copyrights protect original works of authorship fixed in tangible media of expression, such as literary, musical, dramatic, pantomime, choreographic, pictorial, graphic, sculptural, motion-picture, audiovisual, or architectural works, or sound recordings. 17 U.S.C. § 102. Patents protect inventions, namely, processes, machines, manufactures, compositions of matter, or any new and useful improvements thereof, so long as they aren't directed to laws of nature, natural phenomena, and abstract ideas. 35 U.S.C. § 101; Alice Corp. v. CLS Bank International, 134 S. Ct. 2347 (2014). You may be able to patent a business method provided you can define it as a process that is not directed to an abstract idea, or is directed to something significantly more than an ineligible abstract idea.
If you want to disclose your idea to others but don't want them to blab about it, or make use of it for their own profit, you will want to have some sort of contractual arrangement with them in place prior to telling them. This typically takes the form of a non-disclosure agreement (NDA) or non-compete agreement. Because these can be complicated, you will want to consult with an attorney.