Condensed Consolidated Statements of Financial Position - USD ($) $ in Millions	Jun. 30, 2021	Dec. 31, 2020
Current assets
Cash and cash equivalents	$ 1,091	$ 884
Short-term investments	289	308
Receivables, net	3,545	3,070
Fiduciary assets	15,804	13,798
Other current assets	547	624
Total current assets	21,276	18,684
Goodwill	8,659	8,666
Intangible assets, net	564	640
Fixed assets, net	585	599
Operating lease right-of-use assets	863	911
Deferred tax assets	738	724
Prepaid pension	1,349	1,280
Other non-current assets	546	610
Total assets	34,580	32,114
Current liabilities
Accounts payable and accrued liabilities	1,692	2,016
Short-term debt and current portion of long-term debt	13	448
Fiduciary liabilities	15,804	13,798
Other current liabilities	1,418	1,171
Total current liabilities	18,927	17,433
Long-term debt	7,272	7,281
Non-current operating lease liabilities	841	897
Deferred tax liabilities	417	262
Pension, other postretirement, and postemployment liabilities	1,644	1,763
Other non-current liabilities	912	895
Total liabilities	30,013	28,531
Equity
Ordinary shares - $0.01 nominal value Authorized: 500 shares (issued: 2021 - 225.6; 2020 - 225.5)	2	2
Additional paid-in capital	6,381	6,312
Retained earnings	1,823	1,042
Accumulated other comprehensive loss	(3,744)	(3,861)
Total Aon shareholders' equity	4,462	3,495
Noncontrolling interests	105	88
Total equity	4,567	3,583
Total liabilities and equity	$ 34,580	$ 32,114