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Valuation and Qualifying Accounts and Reserves (Schedule II) (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Allowance for Doubtful Accounts |  |  |
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward] |  |  |
Beginning balance | $ 45.9 | $ 53.0 | $ 40.5
Bad debt expense | 53.1 | 38.2 | 42.7
Uncollectible accounts written off, net of recoveries | (62.5) | (45.3) | (30.2)
Ending balance | 36.5 | 45.9 | 53.0
Deferred Tax Asset Valuation Allowance |  |  |
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward] |  |  |
Beginning balance | 73.5 | 44.1 | 17.3
Additions (deductions) | 7.4 | 10.6 | (0.5)
Acquired balances | 3.7 | 18.8 | 27.3
Ending balance | $ 84.6 | $ 73.5 | $ 44.1

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- Definition Amount of valuation and qualifying accounts and reserves. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 4 -Subparagraph (SX 210.12-09) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e24092-122690 + Details
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- Definition Amount of increase in valuation and qualifying accounts and reserves from charge to cost and expense. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 4 -Subparagraph (SX 210.12-09) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e24092-122690 + Details
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