Free download from Lexus tech site.
http://www.lexus-tech.eu/MaintenanceSchedules/ls/Final.pdf
Here's the schedule for the original LS460s
Annual service (minor)
* Replace oil (SL/SM) and filter
* Inspect steering wheel, linkage and steering gear box
* Inspect brake pedal and parking brake
* Inspect brake linings and drums
* Inspect brake pads and discs
* Inspect brake fluid
* Inspect brake pipes and hoses
* Inspect exhaust pipes and mountings
* Inspect battery
* Inspect air cleaner filter
* Inspect suspension ball joints and dust covers
* Inspect rear differential oil
* Inspect front and rear suspension
* Inspect tyres and inflation pressure
* Inspect lights, horns, wipers and washers
* Inspect air conditioner refrigerant amount
* Check that the radiator and condenser are not blocked with leaves, dirt or insects; check radiator fins; check hoses and connections for correct installation, corrosion etc.; clean if needed - every 2 years for first 4 years, then annually
* Inspect 'Fuel tank cap, fuel lines, connections and fuel vapor control valve' every 2 years for first 4 years, then annually
Extra items at major service (every 2 years)
* Replace brake fluid - SAE J1703 or FMVSS No. 116 DOT3
* Replace air cleaner filter
* Inspect drive belts
* Inspect coolant
* inspect charcoal canister
* Inspect drive shaft boots
* Inspect automatic transmission fluid (type WS)
Less frequent items
* Replace coolant at 100,000 miles then every 50,000 miles
Only use "Toyota Super-Long Life Coolant" or similar high quality ethylene glycol based non-silicate, non-amine, non-nitrate and non-borate coolant with long-life hybrid organic acid technology (coolant with long-life hybrid organic acid technology is a combination of low phosphates and organic acids)
* Replace spark plugs (platinum/iridum-tipped) every 60,000 miles
* Replace fuel filter every 8 years
* Replace rear differential oil API gear oil GL-5 every 4 years
The LS600h is basically the same, but with a couple of fluid changes related to the AWD system.
Lexus charge £199 flat rate for an 'essential care' service minor, and £399 for major. It's difficult to see the justification for charging double for the major service.