Cash paid for interest during the years ended December 31, 2019, 2018 and 2017, was $63 million, $49 million and $42 million, respectively. Cash paid for income taxes during the years ended December 31, 2019, 2018 and 2017 was $74 million, $153 million and $57 million, respectively.

The following non-cash activities were excluded from the consolidated statements of cash flows:

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In 2019, we recorded a $23 million non-cash issuance of other debt related to the acquisition of property for future conversion to inventory involving a note payable financed by the seller.

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In 2019, we recorded net non-cash operating activity transfers of $25 million from Property and equipment to Inventory related to the registration of timeshare units under construction.

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In 2019, we recorded non-cash operating activity transfers of $40 million related to the reclassification of deposits on properties for future development into timeshare inventory from Other assets to Property and equipment.

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In 2018, we recorded a cumulative non-cash adjustment of $38 million related to the adoption of ASC 606. See Note 3: Revenue from Contracts with Customers for more information.

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In 2018, we recorded a $3 million non-cash operating activity transfer from Property and Equipment, net to Inventory.

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In 2018, we recorded a $3 million non-cash financing activity adjustment to equity related to the write-off of expenses due to Hilton prior to the spin-off

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In 2017, we recorded a $40 million non-cash operating activity transfer from Property and Equipment, net to Inventory.