But since their divorce in 2005, the arrangement has been fraught with disagreement.
We both came across as confident and, on occasion, slightly ill-mannered, when met with disagreement from others.
Even if that collaboration is fraught with disagreement, as it evidently was on the set of Blue.
There was also some uncertainty ahead of this week's Opec meeting, with disagreement about whether the cartel would agree to cut production or not.
What is non-negotiable, though, is the group's demand that the church deal with disagreement on this matter by expelling its opponents.
Latin American diplomats, however, say negotiations over a joint text to be issued at the end of the three-day meeting have been fraught with disagreement.
He was not a man to tangle with: disagreement with him tended to convince him one was either thick or anti-Arab.
It's often characterised by personal attacks, sexual comments, racism, homophobia or transphobia and threats of physical violence or rape – none of which have anything to do with disagreement.
Frank opinions were exchanged, and although the meeting ended with disagreement, this was a beginning of a dialogue, one which the free world desperately needs.
Jurors must assess evidence, judge the credibility of witnesses, and decide whether to stick to their guns when faced with disagreement from fellow-jurors.
It was riven with disagreement over the Soviet invasion of Afghanistan in 1979 and had nothing to say about the captive nations of the Kremlin's empire.
