Condensed Consolidated Statements of Financial Position - USD ($) $ in Millions	Sep. 30, 2021	Dec. 31, 2020
Current assets
Cash and cash equivalents	$ 609	$ 884
Short-term investments	310	308
Receivables, net	3,117	3,070
Fiduciary assets	14,017	13,798
Other current assets	687	624
Total current assets	18,740	18,684
Goodwill	8,547	8,666
Intangible assets, net	529	640
Fixed assets, net	541	599
Operating lease right-of-use assets	823	911
Deferred tax assets	761	724
Prepaid pension	1,350	1,280
Other non-current assets	525	610
Total assets	31,816	32,114
Current liabilities
Accounts payable and accrued liabilities	1,995	2,016
Short-term debt and current portion of long-term debt	150	448
Fiduciary liabilities	14,017	13,798
Other current liabilities	1,348	1,171
Total current liabilities	17,510	17,433
Long-term debt	8,250	7,281
Non-current operating lease liabilities	817	897
Deferred tax liabilities	414	262
Pension, other postretirement, and postemployment liabilities	1,607	1,763
Other non-current liabilities	919	895
Total liabilities	29,517	28,531
Equity
Ordinary shares - $0.01 nominal value Authorized: 500.0 shares (issued: 2021 - 221.4; 2020 - 225.5)	2	2
Additional paid-in capital	6,529	6,312
Retained earnings (accumulated deficit)	(445)	1,042
Accumulated other comprehensive loss	(3,877)	(3,861)
Total Aon shareholders' equity	2,209	3,495
Noncontrolling interests	90	88
Total equity	2,299	3,583
Total liabilities and equity	$ 31,816	$ 32,114