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Summary of Significant Accounting Policies Summary of Significant Accounting Policies (Tables) | 12 Months Ended
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Dec. 31, 2021
Accounting Policies [Abstract] |
Redeemable Noncontrolling Interest [Table Text Block] | Changes in amounts attributable non-redeemable noncontrolling interests are reflected in the Consolidated Statements of Changes in Equity. Changes in amounts attributable to redeemable noncontrolling interests are presented in the following table.
(in millions) |
Redeemable noncontrolling interests as of December 31, 2018 | $ | — |
Business acquisition (1) | 8.4 |
Net income | 0.2 |
Redeemable noncontrolling interests as of December 31, 2019 | 8.6 |
Net loss | (0.3) |
Distribution to redeemable noncontrolling interest | (0.5) |
Redeemable noncontrolling interests as December 31, 2020 | 7.8 |
Net loss | (0.1) |
Other | 0.1 |
Redeemable noncontrolling interests as of December 31, 2021 | $ | 7.8 |
(1) Reflects the ownership interests retained by the seller associated with our 2019 acquisition of Latitude Real Estate Investors.
Financing Receivable, Allowance for Credit Loss [Table Text Block] | The following table details the changes in the allowance for uncollectible receivables.
(in millions) | 2021 | 2020 | 2019
Allowance as of January 1,(1) | $ | 66.5 |  | 71.7 |  | 52.0 |
Charged to income | 25.5 |  | 24.3 |  | 30.8 |
Write-off of uncollectible receivables | (22.1) |  | (29.5) |  | (13.8) |
Impact of exchange rate movements and other | (2.3) |  | — |  | (0.9) |
Allowance as of December 31, | $ | 67.6 |  | 66.5 |  | 68.1 |
(1) January 1, 2020 includes $3.6 million adjustment due to the adoption of ASC Topic 326.
Property, Plant and Equipment [Table Text Block] | The following table shows the gross value of major asset categories and the standard depreciable lives, as of December 31, 2021, for each of these asset categories.
| December 31, |
($ in millions) | 2021 | 2020 | Depreciable Life
Furniture, fixtures and equipment | $ | 132.5 |  | 127.9 |  | 3 to 13 years
Computer equipment and software | 886.9 |  | 829.8 |  | 2 to 7 years
Leasehold improvements | 396.0 |  | 352.4 |  | 1 to 15 years
Other (1) | 233.6 |  | 160.0 |  | 2 to 30 years
Total | 1,649.0 |  | 1,470.1 |  |
Less: Accumulated depreciation | 909.1 |  | 806.2 |  |
Net property and equipment | $ | 740.0 |  | 663.9 |  |
(1) Other includes certain assets, such as land, which are not depreciated.
Disaggregation of Revenue | Such out-of-scope revenue was included entirely within Americas Capital Markets and is presented below.
| Year Ended December 31,
(in millions) | 2021 | 2020 | 2019
Revenue excluded from scope of ASC Topic 606 | $ | 337.1 |  | 305.3 |  | 204.6 |
Contract with Customer, Contract Asset, Contract Liability, and Receivable | Detail of our contract assets and liabilities is presented below.
(in millions) | December 31, 2021 | December 31, 2020
Contract assets, gross | $ | 438.7 |  | 347.8 |
Allowance for contract assets | (2.8) |  | (2.1) |
Contract assets, net | $ | 435.9 |  | 345.7 |
Contract liabilities | $ | 128.9 |  | 111.0 |

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