Johnson & Johnson on Wednesday said it plans to pay $6.5 billion over 25 years to settle nearly all of the thousands of lawsuits in the U.S. claiming its talc-based products caused ovarian cancer, pending approval of the claimants.Those cases have for decades caused financial and public relations trouble for J&J, which contends that its now-discontinued talc baby powder and other talc products are safe for consumers. About 99% of the talc-related lawsuits filed against J&J and its subsidiaries s...