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Defined Benefit Plans (Tables) | 12 Months Ended
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Dec. 31, 2019
Retirement Benefits [Abstract] |
Schedule of Defined Benefit Plans | The table below provides summary information on the defined benefit plans:
| December 31,
| 2019 |  | 2018 |  | 2017
| in millions
Fair value of plan assets (a) | $ | 1,500.0 |  |  | $ | 1,305.0 |  |  | $ | 1,412.2 |
Projected benefit obligation | $ | 1,407.5 |  |  | $ | 1,217.5 |  |  | $ | 1,335.4 |
Net asset | $ | 92.5 |  |  | $ | 87.5 |  |  | $ | 76.8 |
_______________ (a) The fair value of plan assets at December 31, 2019 includes $1,120.1 million, $113.3 million and $266.6 million of assets that are valued based on Level 1, Level 2 and Level 3 inputs, respectively, of the fair value hierarchy (as further described in note 9). Our plan assets comprise investments in debt securities, equity securities, hedge funds, insurance contracts and certain other assets.

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- Definition Tabular disclosure of net funded status of pension plans and/or other employee benefit plans. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920 + Details
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