Consolidated Statements of Financial Position - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020
Current assets
Cash and cash equivalents	$ 544	$ 884
Short-term investments	292	308
Receivables, net	3,094	3,070
Fiduciary assets	14,386	13,798
Other current assets	716	624
Total current assets	19,032	18,684
Goodwill	8,434	8,666
Intangible assets, net	492	640
Fixed assets, net	529	599
Operating lease right-of-use assets	786	911
Deferred tax assets	766	724
Prepaid pension	1,366	1,280
Other non-current assets	512	610
Total assets	31,917	32,114
Current liabilities
Accounts payable and accrued liabilities	2,192	2,016
Short-term debt and current portion of long-term debt	1,164	448
Fiduciary liabilities	14,386	13,798
Other current liabilities	1,331	1,171
Total current liabilities	19,073	17,433
Long-term debt	8,228	7,281
Non-current operating lease liabilities	772	897
Deferred tax liabilities	401	262
Pension, other postretirement, and postemployment liabilities	1,375	1,763
Other non-current liabilities	910	895
Total liabilities	30,759	28,531
Equity
Ordinary shares - $0.01 nominal value Authorized: 500.0 shares (issued: 2021 - 214.8; 2020 - 225.5)	2	2
Additional paid-in capital	6,624	6,312
Retained earnings (accumulated deficit)	(1,694)	1,042
Accumulated other comprehensive loss	(3,871)	(3,861)
Total Aon shareholders' equity	1,061	3,495
Noncontrolling interests	97	88
Total equity	1,158	3,583
Total liabilities and equity	$ 31,917	$ 32,114