I found the lyrics in Reading Lyrics, by Robert Gottlieb and Robert Kimball. In print, it's clearly "MOON a million hours away." Hope you don't mind that I added the correction above, Jim. There are other differences, but nothing significant. I listened to several recordings on Spotify, and heard a lot of minor differences in lyrics. The Ray Bolger recording is terrific, by the way. I suppose Sinatra's recording is the standard, but Bolger is far better at bringing out the cleverness of Loesser's lyrics.

-Joe-