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$450,000 for a Vacation? Inside a Billionaire's Divorce

Chicago billionaire Ken Griffin and his wife Ann Dias are divorcing. CNBC's Robert Frank reports the child support and family expense requests.
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The divorce of hedge fund billionaire Ken Griffin just keeps on providing revelations about the couple's spending.

Last month, we learned that the family spent $1 million per month in expenses related to their three kids. The filings didn't break down the spending much, saying that it included $300,000 a month for intercontinental private-jet travel, $160,000 a month for vacation rentals and $60,000 a month for office space and professional staff.

Now, new court documents give more details on the $1 million a month. According to filings late Friday, Griffin argued that his ex-wife, Anne Dias, is claiming expenses as child support even though the expenses are for her "lifestyle."

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Among the expenses: $6,800 a month for groceries, $7,200 a month for restaurant meals, $8,000 a month for gifts and $2,000 a month for stationery. Griffin also claims his wife has sought $450,000 for a 10-day vacation in St. Bart's during the children's winter break.

Expenses not disputed, per se

Dias' lawyers don't dispute the expenses per se. But they argue that under Illinois law, Griffin is required to fund the children's lifestyle as it was during their parents' marriage. And they say the expenses are simply an accounting of all the couple's child-related expenses while they were married.

Dias is seeking to nullify the couple's prenup and claims Griffin is failing to pay adequate child support for their three kids, who are all under age 10.

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Griffin said he is paying "virtually every expense" related to the children, including their four nannies. He said he has even paid expenses that are solely for Dias' benefit, including a private chef, multiple house cleaners and a house manager/personal assistant. He said that while he declined to fund the $450,000 vacation, he said he gave her $45,000 for the winter vacation.

Griffin said Dias is trying to fund her "opulent lifestyle" by saying her personal expenses should be part of child support.