Restructuring Costs (Restructuring Activities) (Details) - Jardine Lloyd Thompson Group plc - USD ($) $ in Millions	9 Months Ended	12 Months Ended
	Sep. 30, 2022	Dec. 31, 2021
Restructuring Reserve [Roll Forward]
Liability at beginning of period	$ 69	$ 106
Restructuring charges	96	163
Cash payments	(124)	(178)
Non-cash charges	(7)	(22)
Liability at end of period	34	69
Severance
Restructuring Reserve [Roll Forward]
Liability at beginning of period	35	52
Restructuring charges	6	38
Cash payments	(31)	(55)
Non-cash charges	0	0
Liability at end of period	10	35
Real Estate Related Costs
Restructuring Reserve [Roll Forward]
Liability at beginning of period	34	51
Restructuring charges	12	31
Cash payments	(18)	(26)
Non-cash charges	(5)	(22)
Liability at end of period	23	34
Information Technology
Restructuring Reserve [Roll Forward]
Liability at beginning of period	0	2
Restructuring charges	7	23
Cash payments	(5)	(25)
Non-cash charges	(2)	0
Liability at end of period	0	0
Consulting and Other Outside Services
Restructuring Reserve [Roll Forward]
Liability at beginning of period	0	1
Restructuring charges	71	71
Cash payments	(70)	(72)
Non-cash charges	0	0
Liability at end of period	$ 1	$ 0