Seems like they have an upcoming bigger than expected tax bill...
> In September 2020, we received a Draft Notice of Proposed Adjustment from the IRS for the 2013 tax year proposing an increase to our U.S. taxable income that could result in additional income tax expense and cash tax liability of $1.35 billion, plus penalties and interest, which exceeds our current reserve recorded in our consolidated financial statements by more than $1.0 billion.
> In September 2020, we received a Draft Notice of Proposed Adjustment from the IRS for the 2013 tax year proposing an increase to our U.S. taxable income that could result in additional income tax expense and cash tax liability of $1.35 billion, plus penalties and interest, which exceeds our current reserve recorded in our consolidated financial statements by more than $1.0 billion.