For the record, we used funds from the transportation section of the budget to pay for this.
That wasn't said in the bill. And I remember talking before that this would use up most of our surplus. Nobody said that this was to be taken from the transportation section back then.
I'm also not sure how we could take $20B from the transportation section, since the total transportation budget is only $23.25B:
Transportation ($23.25 billion)
$9.00 billion ..... Highways and highway safety (No Change)
$4.00 billion ...... Mass transit (No Change)
$0.25 billion ...... Railroads (No Change)
$2.05 billion ..... Air Transportation (No Change)
$1.05 billion ...... Water transportation (No Change)
$0.45 billion ...... Other transportation (No Change)
$6.45 billion ..... Non-Highway Roads (No Change)
Mass transit and Rail only accounts for $4.25.