USB Type-C Specification
USB Type-C is the new USB-IF standard that solves several challenges faced by today's Type-A and Type-B cables and connectors. USB Type-C uses a slimmer connector (measuring only 2.4-mm in height) to allow for increasing miniaturization of consumer and industrial products. The specification allows for fully reversible plugs and enables transport of both USB signals and PCIe or DisplayPort signals on the same connector. The Type-C specification also increases the power delivery capability from 7.5 W to 100 W.
USB 3.1 specification (including Type-C)
USB Power Delivery specification