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Acquisitions - Aggregate Purchase Price (Details) - Nationstar Mortgage Holdings Inc. $ / shares in Units, shares in Millions, $ in Millions | Aug. 01, 2018 USD ($) $ / shares shares
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Business Acquisition [Line Items] |
Converted WMIH common shares (in shares) | shares | 394
Price per share (in dollars per share) | $ / shares | $ 1.398
Purchase price from common stock issued | $ 551
Purchase price from cash payment | 1,226
Total purchase price | $ 1,777

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