I don't have any details.
I've heard people saying this phrase both singularly and plurally, so I want to know which is the correct way. For me, it's easy to understand it as singular, but I'm not sure why they use the plural.
I don't have any details.
I've heard people saying this phrase both singularly and plurally, so I want to know which is the correct way. For me, it's easy to understand it as singular, but I'm not sure why they use the plural.
Instinctively, I would use the plural here.
At face value, both phrases can be used interchangeably. However, there is a difference in implication:
The implication often relies on the rarity of the thing you're looking for.
For your example about details, you are not really limiting yourself to asking about a single detail. If these person has three things to talk about (three details), you'll want to hear all of them, right?
So for your example, I would use plural. Details are not inherently rare, an therefore should not be restricted to singular usage.
edit
There are arguments to be made about the usage of "detail" as an uncountable noun. However, while I don't deny the grammatical correctness of doing so, I would personally favor using the countable plural over the uncountable singular, hence my answer.