Answer by taking a quote from the following article:

Kidman was born 20 June 1967 in Honolulu, Hawaii, while her Australian parents were temporarily in the United States on student visas. Her father was Antony Kidman (1938-2014), a biochemist, clinical psychologist and author, who died of a heart attack in Singapore aged 75. Her mother, Janelle Ann (nee Glenny), is a nursing instructor who edited her husband's books and was a member of the Women's Electoral Lobby. Kidman's ancestry includes Irish, Scottish and English heritage.

In 2002, Kidman first appeared on the Australian rich list published annually in the Business Review Weekly with an estimated net worth of A$122 million. In the 2011 published list, Kidman's wealth was estimated at A$304 million, down from A$329 million in 2010. Kidman has raised money for, and drawn attention to, disadvantaged children around the world. In 1994, she was appointed a goodwill ambassador for UNICEF, and in 2004, she was honoured as a "Citizen of the World" by the United Nations. Kidman joined the Little Tee Campaign for breast cancer care to design T-shirts or vests to raise money to fight the disease; motivated by her mother's own battle with breast cancer in 1984.  In the 2006 Australia Day Honours, Kidman was made a Companion of Order of Australia (AC) for "service to the performing arts as an acclaimed motion picture performer, to health care through contributions to improve medical treatment for women and children and advocacy for cancer research, to youth as a principal supporter of young performing artists, and to humanitarian causes in Australia and internationally." However, due to film commitments and her wedding to Urban, it wasn't until 13 April 2007 that she was presented with the honour. It was presented by the Governor-General of Australia, Major General Michael Jeffery, in a ceremony at Government House, Canberra. Kidman was appointed goodwill ambassador of the United Nations Development Fund for Women (UNIFEM) in 2006. In this capacity, Kidman has addressed international audiences at UN events, raised awareness through the media and testified before the United States House of Representatives Committee on Foreign Affairs to support the International Violence against Women Act. Kidman visited Kosovo in 2006 to learn about women's experiences of conflict and UNIFEM's support efforts. She is the international spokesperson for UNIFEM's Say NO - UNiTE to End Violence against Women initiative. Kidman and the UNIFEM executive director presented over five million signatures collected during the first phase of this to the UN Secretary-General on 25 November 2008.  In the beginning of 2009, Kidman appeared in a series of postage stamps featuring Australian actors. She, Geoffrey Rush, Russell Crowe, and Cate Blanchett each appear twice in the series: once as themselves and once as their Academy Award-nominated character, Kidman's second stamp showed her as Satine from Moulin Rouge!. On 8 January 2010, alongside Nancy Pelosi, Joan Chen and Joe Torre, Kidman attended the ceremony to help Family Violence Prevention Fund break ground on a new international center located in the Presidio of San Francisco.  In 2015, Kidman became the brand ambassador for Etihad Airways.  Kidman supports the Nashville Predators, being seen and photographed almost nightly throughout the season. Additionally, she supports Sydney Swans in the Australian Football League, and once served as a club ambassador.

How much money did she raise?
Kidman's wealth was estimated at A$304 million, down from A$329 million in 2010.