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Leases - Lease Expense and Cash Flow Information (Details) - USD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2021 | Dec. 31, 2020
Leases [Abstract] |  |
Operating lease costs | $ 76.4 | $ 74.1
Finance lease costs: |  |
Amortization of leased assets | 25.1 | 26.2
Interest on lease liabilities | 27.4 | 22.2
Total finance lease costs | 52.5 | 48.4
Variable and short-term lease costs | 17.8 | 16.9
Total lease costs | 146.7 | 139.4
Cash paid for amounts included in the measurement of lease liabilities: |  |
Operating cash outflows from operating leases | 74.3 | 68.1
Operating cash outflows from finance leases | 26.5 | 20.7
Financing cash outflows from finance leases | 20.1 | 18.3
Right-of-use assets obtained in exchange for lease obligations: |  |
Operating leases | 68.7 | 62.1
Finance leases | $ 73.4 | $ 47.0

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- Definition Amount of interest expense on finance lease liability. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 50 -Paragraph 4 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=123408670&loc=SL77918686-209980 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 45 -Paragraph 4 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=123391704&loc=SL77918638-209977 Reference 3: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 55 -Paragraph 53 -URI http://asc.fasb.org/extlink&oid=123414884&loc=SL77918982-209971 + Details
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