If there's one thing Unilever knows how to do it's make money. It's a huge operation and knows exactly what it's doing. It's quite possible that the margins in the US detergent business are just too low for them to have been all that concerned with it - meanwhile they're concentrating on more profitable ventures in the US, mostly in personal care and food products.
Unilever's operations in Europe are enormous, much like P&Gs are in the US. It's just a case of dumping brands they're not making enough profit on.
In Europe, the margins on detergents are being squeezed very hard too.
The major change over here has been supermarket own-brands suddenly going from being BOL cheap and nasty to being quite high tech, effective and often more innovative than Unilever, Henkel and P&G !
E.g. it was own-brand maker McBride that first marketed Liquid-capsules !
The core European Unilever detergent brands i.e. Omo (and re-badged Omo - Persil (UK/IRL), Skip (France)) and Surf are continuing to hold their own.
The Omo (Premium brand) in particular is one of the international 'billion dollar' detergents (Along with Tide, Persil and Ariel)
The US detergent market is possibly even tighter margin squeezing. It's clear from what P&G are up to recently, i.e. launching 'naturals' that they're trying to get more value added into the generic Tide brand by selling premium versions of it.
I generally don't think US detergents, from what I have read/seen first hand, have been particularly 'technology-driven' or 'innovation-driven' compared to Europe. Which has resulted in a situation where the company that can churn out most detergent and get maximum economies of scale i.e. P&G in this case, will squeeze out all competition.
I mean, if you look at US detergents compared to European equivilents. They're all stuck in one bulky liquid format and seem to mostly just be "with bleach" "with bleach alternative" or "bleach free"
This compares to a European market where you've:
Powder, Liquid, Tablets (either to put in drawer/drum), Liqui-Tabs, Disolvable liquid capsules etc.
Then:
Universal
Colour
Darks
Wools & Silks
Then:
Umpteen fragrances
and with : fabric softener or additives like Aloe Vera
Then:
Bio (Enzymes)
Non-Bio (no Enzymes)
Sensitive
etc
And, then you've got constant advertising based on technology innovations and reformatting.
I just found the US detergent market was a lot more stale. Even though there were umpteen versions of Tide, they were all very 'samey' and the other producers were not doing much i.e. Unilever, Purex (Henkel) and Arm and Hammer.
The only interesting products I found were in the naturals type range e.g. Seventh Generation..
I'd say you're heading towards a very boring detergent market unless something changes.
Perhaps if Henkel picks up the Unilever brands you might get them re-invigorated although, I'd say it's a tough market. Doesn't seem henkel's even too keen on doing much with Purex.