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Debt (Tables) | 12 Months Ended
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Dec. 31, 2017
Debt [Abstract] |
Available and Unused Credit Lines | Available and unused credit lines at December 31, 2017 and 2016 were (in millions):
| 2017 |  | 2016
Credit Facility | $ | 2,500.0 |  |  | $ | 2,500.0 |
Uncommitted credit lines | 1,181.0 |  |  | 1,132.0 |
Available and unused credit lines | $ | 3,681.0 |  |  | $ | 3,632.0 |
Long-Term Debt | Long-term debt at December 31, 2017 and 2016 was (in millions):
| 2017 |  | 2016
6.25% Senior Notes due 2019 | $ | 500.0 |  |  | $ | 500.0 |
4.45% Senior Notes due 2020 | 1,000.0 |  |  | 1,000.0 |
3.625% Senior Notes due 2022 | 1,250.0 |  |  | 1,250.0 |
3.65% Senior Notes due 2024 | 750.0 |  |  | 750.0 |
3.60% Senior Notes due 2026 | 1,400.0 |  |  | 1,400.0 |
Other debt | — |  |  | 0.1 |
| 4,900.0 |  |  | 4,900.1 |
Unamortized premium (discount), net | 6.2 |  |  | 7.6 |
Unamortized debt issuance costs | (20.3 | ) |  | (24.2 | )
Unamortized deferred gain from settlement of interest rate swaps | 66.4 |  |  | 84.7 |
Fair value adjustment attributed to outstanding interest rate swaps | (39.4 | ) |  | (47.6 | )
| 4,912.9 |  |  | 4,920.6 |
Current portion | — |  |  | (0.1 | )
Long-term debt | $ | 4,912.9 |  |  | $ | 4,920.5 |
Contractual Maturities of Long-Term Debt | The contractual maturities of our long-term debt at December 31, 2017 are (in millions):
2018 | $ | — |
2019 | 500.0 |
2020 | 1,000.0 |
2021 | — |
2022 | 1,250.0 |
Thereafter | 2,150.0 |
| $ | 4,900.0 |
Components of Interest Expense | Interest expense for the three years ended December 31, 2017 is composed of (in millions):
| 2017 |  | 2016 |  | 2015
Long-term debt | $ | 201.6 |  |  | $ | 205.5 |  |  | $ | 210.2 |
Interest rate swaps | (7.2 | ) |  | (13.1 | ) |  | (44.1 | )
Amortization of deferred gain on interest rate swaps | (12.9 | ) |  | (15.4 | ) |  | (9.2 | )
Commercial paper | 12.5 |  |  | 6.8 |  |  | 4.8 |
Fees | 5.6 |  |  | 5.6 |  |  | 5.7 |
Other | 24.9 |  |  | 20.3 |  |  | 13.7 |
| $ | 224.5 |  |  | $ | 209.7 |  |  | $ | 181.1 |

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- Definition Tabular disclosure of long-debt instruments or arrangements, including identification, terms, features, collateral requirements and other information necessary to a fair presentation. These are debt arrangements that originally required repayment more than twelve months after issuance or greater than the normal operating cycle of the entity, if longer. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=84159872&loc=d3e21475-112644 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 470 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=75038535&loc=d3e64711-112823 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(e),(f)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 55 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=64930739&loc=d3e28878-108400 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=84159872&loc=d3e21538-112644 Reference 7: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=84159872&loc=d3e21506-112644 Reference 8: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 1A -URI http://asc.fasb.org/extlink&oid=64930785&loc=d3e28541-108399 Reference 9: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=64930785&loc=d3e28551-108399 Reference 10: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=84159872&loc=d3e21521-112644 + Details
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- Definition Tabular disclosure of short-term or long-term contractual arrangements with lenders, including letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.19(b),22(b)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(e),(f)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 + Details
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- Definition Tabular disclosure of the combined aggregate amount of maturities and sinking fund requirements for all long-term borrowings for each of the five years following the date of the latest balance sheet date presented. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6802200&loc=d3e1835-112601 + Details
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